Garden room 1st fix electrical circuits and roof insulation

Well here it is, this 1 video promises to be the 1 that gives me the most grief from both electricians and warm roof supporters.
we have used 1mm twin and earth for the lighting circuit and 2.5 twin and earth for the socket radial and heating circuit.
100mm insulation is fitted tight to the underside of the ceiling and this then eliminates any trapped air that may condensate, as is sometimes an issue in a cold roof.

[@nicholasroyle1814]

I am a 61 year old qualified spark and I don't see a problem with what you have done, in fact I was particularly impressed with the effort taken to neatly clip the lighting circuit internally and is an example of how it should be done. However as some viewers will take this as an instructional video on how to instal electrics in a garden room, please will you show how you are going to take the supply from the house and point out to your viewers that the installation is notifiable to building control regardless of planning permisssion being required for the garden room itself. I am a great fan of your videos and your work by the way, and your standard of workmanship is clearly second to none

[@steveharman8907]

Loving your vlogs William...simple to understand....not for me to do myself but certainly helped with the design and exactly what we need to include and consider...thanks again

[@TheSpudder007]

You’re a brave man Liam. Mixing the controversial external wiring installation with the hybrid roof info all into one video!! I look forward to reading the comments! 👍🏼👍🏼👍🏼

[@diywooddesign1548]

I take alot away from your videos, thanks for the great tutorials. Keep them coming!

[@cristianmoore2158]

Nice work lads I've been a sparky for 32 years and can see you do a grand job.Totally agree with your installation practices,love watching your videos keep up the good work 👍

[@casperme6552]

Speaking as a spark with 30 years experience (RAF bases, GCHQ, hospitals etc, I was expecting to be shaking my head (or more likely laughing, given that I enjoy taking the piss), but tbh you are, in theory at least, 100% spot on👍 Taping cables together so you know you've pulled them all through- smart (many sparks don't bother and are then searching for cables after the boarders have left some above the ceiling). Running cables on the outside- smart, as you say, there is more chance of the cables being damaged on the inside than the outside. Ring mains are (apparently) a thing of the past, the UK is unusual in still using them. Having said that, you can very quickly run out of power on a 16amp radial circuit , less so on a 20amp, and obviously much less so on a garden room. Wiring a ring does gives you a chance of rescuing a circuit which has been nailed through (making 2 radials from the ring main). Domestic electrics are pretty simple, you could teach someone to wire one of your rooms in a week. The much more difficult thing is the practical side of things, you wouldn't believe the amount of bad connections that I've come across, mostly done by builders and diy'ers . I'd use 'wago' connectors instead of chocblocs, once you've used them you'll never use anything else. If you are worried about your cable ratings and insulation, you could always use 1.5mm, unless you've got a complicated multigang switch, it won't make your life any harder. I was honestly expecting these video's to be really shoddy and the buildings thrown up in a day, but they do look really well done 👍

[@andrewlangridge8619]

As a landscaper with a small business on the South Coast I really enjoy your uploads, it amazes me how you fit so much useful info in as well as filming and explaining, very informative even to a decades served cynical old Landscaper like me. Thanks again! And remember to have some downtime!

[@mikejohnson363]

Great videos, I always enjoy and get a lot of inspiration and knowledge from them, I have shared your hybrid roof vid many times, I am ready to start building

[@abuubaydullah1]

I'm still re-watch your videos as there is always that little thing i did not see first time round lookin forward to spring and thank you to all for sharing your skill sets, you all need to give yourself a good patt on the back ;-)

[@Tom_Prendiville]

They are called easter eggs 🥚

[@jamesbanni]

These videos are great. Obviously know your stuff and sound logic being applied to everything you do👍

[@waynematthews4030]

Hi guys I am very much liking the information you are sharing perfect for any common sensed diy er to follow and hopefully execute keep up the great vids You and Jen work well as a team 👍👍

[@TheRobeyRober]

This is a cracking video, thank you. I’m currently building my garden room - this has helped massively 👍

[@peterobson1634]

Really enjoyed this series of videos. As an estimator for a flat roofing contractor, there's absolutely nothing wrong with your hybrid roof approach.

[@neildickson330]

Liam awesome video, I'm long way from the electrics but definitely will help when I get there. It takes little or no ability to find faults, that's why there is many critic's out there...!! Keep up the great work....!!

[@marvelousmarve4550]

Taking all this information in for when I start mine in a couple of months great work mate keep it up

[@paulwills3774]

Awesome insight! Love it, not afraid to be challenged

[@Cablesmith]

can’t fault that electrical work at all mate. I think your wise running them externally, having them pressed against the insulation lowers their current carrying capacity. lovely and neat all clipped etc, king span cut for the lights to a nice size plenty of space around the lights. Better than I’ve seen some sparks do. Even taking the feed to the switch is a smart move 👌🏼 keep up the good work mukka.

[@thegardenroomguru]

Thank you, appreciate you’ve taken the time to write this, coming from a spark I truly appreciate it

[@Cablesmith]

@@thegardenroomguru no problem at all, you might wanna look at “2 way ideal insure connectors” for your neutral at the switches, for speed Obviously nothing wrong with a connector block tho. lovely work my friend. I’d be proud of that

[@abobharding]

Yep time served spark 40 years experiance nowt wrong with that !

[@lukepeacham9663]

Thank you for the lesson. Your work is great.

[@glenbuchanan5886]

I also used 100mm PIR for the roof but I had over ordered on the 50mm PIR for the walls. So, where the spot lights are, I used 2x 50mm boards instead of 1x 100mm and cut out 120mm square for the light on the first board, leaving the board against the osb intact with foil on both sides. I also foil taped any cut/exposed PIR edges. (Overboard I know but was paranoid about cold roof condensation). I ended up paying my electrician to do the roughing out (1st fix). He also used 1mm² for the led lights because apparently its a nightmare to fit 2x 1.5mm² wires into the terminals. Great to see you standing by what you believe to be right. Well done.

[@jmom687]

Binge watching your video's. Love them great Job 👍

[@totaltouring829]

Liam, if you know what your doing is right then don’t worry about the shoulda squad. Keep em coming 🙂

[@AccountantDoesDIY]

Exactly what I need and at exactly the right time for the stage of my build. Cheers bud!

[@zjzozn]

Bish-bash-bosh.... Great vlog 👍 Flat surface mounted LED lights are better than downlights. Maintains the integrity of the installation 👍⭐️

[@tentonhammer5469]

I'll watch this in a day so I can enjoy all the comments with a cup of tea when the babies asleep. 👍

[@ooooobpbpbpooooo]

Love the detail around the lighting.

[@calvinhale2723]

I've been a sparks for 20yrs and this is everything that goes wrong when builders do electrics, BS7671 appendix 6 pg 492 paragraph 17 line 4 states.... only joking :) ! great video and I totally agree with the zone of the cable runs, logic and common sense has to prevail. If the regs said jump off a cliff would we ? Love the vids even though I'm a sparks I like the technical work ethic of each build, it's addictive viewing haha.. If you can I'd love to see a run down of how you guys deal with the supply from the internal DB and the ethernet cable install ? If possible, just interested as lots of different methods and ideas. Keep up the good work chaps ! P.s love the gap for the downlights, we usually come back to a job to find our cables wedged on the other side of the Celotex :()

[@calvinhale2723]

@@macsmith6216 Part P is a building regulation stating that the electrics have been carried out by a 'competent' person. William has said he is a competent person. I'm not sure what your point is. All their electrical works are certified and Part P certs issued. (Going by what they say in the videos)

[@moedot7]

You had me there for a second 😂

[@MB-iw6gu]

@@calvinhale2723 not exactly that . Some work needs to be notify to local building authorities and there are 3 ways to do it . Otherwise is no e compliance

[@jeracom]

This guy is a machine 💪 great work 👏

[@therealdojj]

To be honest, I subscribed for the commentary, it's like listening to a South American football game 😁 Learning stuff about stuff is an added bonus 👍

[@thegardenroomguru]

Thanks, I think 🤣

[@therealdojj]

​@@thegardenroomguru I don't have the space to fit one of those rooms if I'm honest, and if i did decide to diy it, i'd probably give up after about 6 months but listening to you explaining the building stuff is simple, to the point, and easily understandable and also hilarious...

[@darrenqualters2341]

Nice install 👍 I’ve been a sparky for 16 years and couldn’t really pick faults with that. You’ve observed the regs better than many installs I’ve seen by so called qualified sparks registered with NICEIC ! Enjoy your videos too, excellent workmanship and enjoy watching a tradesman who does a great job and has pride in his work 👍

[@anthonycampbell9807]

As a sparks myself he’s done a pretty good job there to be fair, seen sparks do a lot worse, he takes pride in what he does and has gone to the effort to learn how to do each thing and does it well. I do have one question though about the supply to your consumer unit. The regs say your not supposed to export the earth from the property to an outbuilding, an earth rod is supposed to be installed which makes your out building a TT earthing system.

[@richmiller540]

@@anthonycampbell9807 this is interesting! I did my electrical qualifications about 20 years ago (16th edition) but then changed jobs so I'm way out of date and have forgotten 99% of what i learnt anyway, can you explain what a TT earthing system is and how it should be done for a garden building like the one in this video. Would really appreciate your reply / advice. Thanks.

[@tresslerj1985]

@@richmiller540 TT or Seperate earthing can be considered advantageous if the supply is coming from a Pme or TNCS where the neutral is used as the return path for protective earthing as if the neutral was to break or be worked on by the DNO there is no earth fault path so no protective devices would work. The danger could be that there is energy coming into the installation and under a fault condition you would be more likely to be the fault path than athy thing else.

[@megazeus7972]

@@tresslerj1985 never understood this point, if theres a break in the supply pme neutral then the house installation would not have a fault path too, so should we rod the house as well?

[@Mark-xz1su]

No dislikes. Says it all. Always risky putting electrical work on KZbin but usually the negative comments never actually back it up with actual facts. Great video

[@marknadin770]

Like the fact your first line of defence is attack the sparky warriors great vids Liam

[@pd-wo3vz]

Absolutely loving your videos!! Might even attempt a build myself but would hire a chippie to help as I struggle to put a shelf up😩

[@starkhorn2626]

So far so good only positive comments. I love your videos Liam, please keep going!!

[@POUSEaroundtheHOUSE]

Nice to see someone else putting their neck on the line with electrical work but disappointed to see no trolls yet, maybe give it until the morning! You've thought about maintenance in the event it goes wrong which makes sense to me. Good work as always 👍

[@Tom_Prendiville]

Dylan Thomas called Swansea an ugly lovely town. I'd call it a pretty shitty city. 🤣 I hope you and all the pouses are well 👍🏼

[@POUSEaroundtheHOUSE]

@@Tom_Prendiville indeed we are thanks for asking. Now buy yourself a nice big tub of sticky sticky and f*** off.

[@kit131179]

Could not wait for video to end so I could start reading through all the Keyboard Warrior comments.... love it every time you discuss the roof and now you added electrics to the equation..... double trouble 😀😀😀

[@thegardenroomguru]

It’s like potentially the most controversial video to date 🙈 just need to put the rubber roof on in temps under 4°, it’ll go crazy then 🤣

[@kit131179]

@@thegardenroomguru dare you too !! 🤣. All the best to you and the team !!

[@thegardenroomguru]

Might get the space heaters out and force dry the plaster at the same time 🙈

[@kit131179]

@@thegardenroomguru cracks, cracks, cracks everywhere 🤣🤣🤣

[@thegardenroomguru]

@@kit131179 cranks mate! 🤣

[@johnfradgley7368]

What a great bloke,does he ever slow down? Working hard and delivering a running commentary.Really enjoy your show

[@skaterguy52]

When you do your drip loop just pop the cables up the back of the overlap of the breather membrane to stop the need for silicone 👌🏻

[@nickdemetriades335]

Is there are no end to your talent Liam. Love the vid and always!!! Very well explained and informative. Looking forward to the next stage. Keep up the good work mate

[@thegardenroomguru]

Nick, we will meet! Your always there!!

[@nickdemetriades335]

Once this lockdown is over mate nothing would please me more. Honestly mate your vids have been inspirational to me and shows with hard work what’s possible. Just love them!!!

[@tentonhammer5469]

@@nickdemetriades335 I do hope you're in the UK or thats gonna be one helluva an expensive meet up for liam 😂😂

[@nickdemetriades335]

Based in London but it’s only a 3 hour drive. 🚗😀

[@momiah5635]

Your a legend mate

[@vajindertaak3158]

Haven't seen you do a first fix video before! I may need to watch this several times when it's quiet. The only other one I've seen is the Ali D one you referenced. I know there's probably a lot out there but I was deliberately avoiding them until after I've settled (and started) my build. Was thinking of just paying for the course to become qualified instead of paying the electrician.

[@thegardenroomguru]

probably cheaper in the long run mate

[@b3zzwilliams988]

Tbh I wouldn’t even go into the electrical wiring side of things in your videos, all you will get is more people having a go at their own electrics which will cause issues down the line. If they are competent themselves they won’t need your Information on how to wire a lighting circuit or a ring circuit. Great videos great builds top stuff. Love it

[@Murdo132]

William. 60 mins and no thumbs down. 🤣. Good work.

[@peterprice8393]

Liam Great videos , but you did not show or mention how the earth is connected and just how important the CPC. Or Earth cable are to firstly protect the cables as well as the lighting and power point connections. You also keep pointing out the RCD protection and the earth plays a large part in the safe working of an RCD. But with todays regs we would now protect individual circuits with RCBO’s. Instead of RCD’s. But the ultimate thought as you say it to always have some body qualified and competent to test the installation if you do it as a DIY protect. Love the video Liam like that you give out as much tech details as possible and the are always a great watch please keep them coming👍.

[@peterthomas9440]

Great video again Liam and love the smirk you have when talking hot/cold roof and electrics. I did my own build (inc. wiring) and as a competent person had more faith in my own work than someone who may not take time to install with care. As the supply was off a new 18th edition split load RCD it is not advised to add another RCD in the office DB - so I fitted RCBO’s on each circuit to protect. Hager boards are the best!

[@peterthomas9440]

@@macsmith6216 nope but as a competent person I know what I’m doing. Also Part P does not apply if supply to DB is on a temporary supply I.e. 63A 2P+E plug. Had it reviewed by building control and they had no problem.

[@peterthomas9440]

@@davebadger100 and you are?

[@Mr-T123]

Hi Will, Great work, I was a sparky turned electrical design engineer. Your install is brilliant. Truth be told it can't be faulted and is compliant with regs. You'd be surprised at the amount of sparks that install cabling without a drip loop. Also it derates the cables current carrying capacity if you run them in insulation. So running them externally makes sense. If you were being OTT - cable guard could be used externally for a little extra time and money but to be honest the cladding is sufficient protection. Only recommendation I'd have is to use 1.5mm instead of 1mm for lighting. Actually nothing to do with the load or current rating but in fact it's because the cabling is so pissy it's often prone to snapping/ damage more easily deteriorates over time. Also it might be worth mentioning that it can in fact be tricky to find sparks to sign of the average DIY'ers work. Most don't like doing it and those that do will charge a premium for doing so. Thanks for sharing. 😁👌👌👌

[@thegardenroomguru]

Thank you very much, good solid comment! Will use this on the Facebook group but delete your name Thanks again

[@darrenqualters2341]

The cpc conductor is the same size in 1mm twin and earth as it is in 1.5mm twin and earth

[@154electrician]

Strange how you can say it doesn't fail on any regs ? There was no cable calculation for the cables in the ceiling that are packed tight in 100mm insulation , also you don't know what size of mcb he's putting them on 🤔🤔🤔

[@thegardenroomguru]

There led, we both know there’s next to no draw, it’s a garden room mate, not drax

[@154electrician]

@@thegardenroomguru not knocking your work , planning on building my own and your vids are a big help ,it all looks spot on , just found it strange the electrical engineers comment without knowing the details .

[@Yodaman2344]

hi great videos and information , just wondering with reference the cold roof scenario i have a new garden shed pressure treated but only felted . It has an overhang around it but the inside of the roof looks and feels damp. I have contacted the supplier as it is just over a year know since being erected and they have advised to put air vents in which are on order now to hopefully cure this problem.Can i do the cold roof option of insulation tight to the ceiling then the damp proof membrane then osb over the top on the inside to insulate the roof . Then if i can do it then i will have to work out how to do the shiplap walls as there is no membrane how would i do this .sorry its so long was going to phone and ask but thought others might have the same issues. if it was me i would knock it down and get you to build me a nice warm shed / workshop for an old man.Keep up the good work

[@liammulligan1279]

Top end job . There is a lot of labour involved I hope the price reflects this

[@Bluestaffy09]

Awesome video mate. I'm going to do this hybrid roof but please can you answer this question. With a hybrid roof do you still need to ventilate the soffits/eaves area to get airflow into the roof?

[@jameswilliams7974]

Its worth noting that 90% of electricians won't sign off a DIYers Electrical Installation Certificate, and those that do are cowboys. Unless the entire installation is visible and they inspect first and second fix. If they did not inspect first fix the best thing can can offer is an EICR.

[@megazeus7972]

Limitations

[@megazeus7972]

@@154electrician yet i see Lim on a test sheet every week, funny eh

[@thegardenroomguru]

Just out of curiosity as I genuinely don’t know, on a new build housing estate, who signs off the installations on all the houses that have been bashed? Is it the guys doing the install or one guy testing all? Like I say I don’t know, but I do remember my time on site years ago, and it certainly wasn’t the guys who threw it in

[@megazeus7972]

@@thegardenroomguru usually a QS, qualifying supervisor

[@megazeus7972]

@@154electrician is gn3 statutory or non-statutory?

[@danhenshy23]

Great video! Currently renovating my garage as a DIY project. What would you suggest insulation wise if there wasn't a layer of OSB above the joists? (Assuming this is a cold roof?)

[@Mclarenbod]

Top MAN 👍

[@lhch]

very nice

[@thelegand1]

Here we go!!!

[@thegardenroomguru]

you aint seen me, right!

[@marcopetrillo6867]

To self-builders, take on board the advice about the thin layer of insulation Liam drops back in the downlight hole (15:10). I never did that, and on frosty mornings I can see 6 patches on the top of the roof where the hot air is obviously getting through haha live and learn.

[@thegardenroomguru]

I think you’d still see it on mine tbf mate, but at least you can see the rest of your roof is insulated right 👌

[@highlandriders9696]

Really enjoying binge watching your videos. Can you clarify can Rockwool be used instead of Kingspan to create a hybrid. I know in a more recent video you use 50mm solid insulation and 50mm rockwool to create the hybrid but could in this case you just use 50mm rockwool? It appears to be quite a bit cheaper.

[@videogalore]

This won't be a popular comment, but for the sake of circa £200 you can submit something for planning permission and not have to worry about keeping below 2.5m height. This then means that you can avoid any potential issues with a roof like this. I appreciate what you have said and the way that you have said it, to make it clear that it's down to choice, but fundamentally warm roof designs get rid of all of these *potential* issues. You mention the use and that if it was intended for a different use than occasional then you would approach it differently, but that doesn't allow for someone moving house and the new owner wanting to use it more intensively. It sounds inherently negative, but it's not intended to be a slight on your work as your detailing looks great, just that you could save yourself and your clients a potential headache by not worrying about obtaining planning permission (or just dropping the rear section enough to bring the tallest part to 2.5m with a warm roof).

[@michaelatkinson1378]

What about some flexi conduit for the wires. Not needed, but it keeps the sparkies off your back

[@82dickiebo]

Hi Liam, I am currently building a Garden Room myself after following your videos, which have been a massive help. Can I just ask, do I need a vapour barrier on the internal walls and ceiling if my build will not have any heating in it? I have done a cold roof with soffit vents at the front and back and was planning using Rockwool in the walls and ceiling leaving a 50mm gap in the ceiling for airflow to get to the soffit vents. I read somewhere that if the building does not have heating in it then a vapour barrier will actually trap moisture and the coldness of night time will not be able to cool that down and get rid of it. Not sure if this is accurate. Thanks!

[@MrBrianmccormack1304]

Another great vid. Can you tell me if its possible to fit a wood burner into your style of build, if so could you explain how to install around the rubber roof etc? Best regards Bri 🏴󠁧󠁢󠁳󠁣󠁴󠁿

[@thegardenroomguru]

You can mate, it’s not something I’ve done but priced for a lot. You’d need to get a certified installer with Hetas, they cut through the roof and use a flashing kit, or out the wall and up, but this is more expensive. Also I believe ideally you need a 2mtr flue for draw efficiency

[@MARTINA-gc3tq]

most of the KZbin "electricians" would be running rings so power to you mate for using radials.

[@erlwindegans3954]

And they will never agree how dangerous a ring is and why ;). Radials all the way

[@sambarnes2063]

@@erlwindegans3954 you’re probably french and upset that we’ve left the EU.

[@erlwindegans3954]

@@sambarnes2063 whahahahaha.

[@erlwindegans3954]

@@macsmith6216 the current-carrying capacity of 2.5mm twin and earth cable is 20-23A hence why a radial is allowed to have a 20A breaker. In a ring, fused at 32A, as soon as a part of the ring fails you won’t notice because your sockets keep working, you technically now have 2 radials but still on a 32A breaker so the cable is now the weakest link in your installation and not properly protected anymore

[@trig33]

Did my wiring externally just like this under double battens and sparky was fine with it

[@jab9208]

I knew you reminded me of someone.. it's T-Bag of prison break.

[@DavidSmith-nd6pj]

Av u ever thought of using insulated plaster board over walls and ceiling .stop any cold bridging and b warmer room .

[@megazeus7972]

I'm a sparky, if it complies to the regs then you can look the judge in the eye 👍

[@ryanmarder2446]

Hi Liam would this idea of a hybrid roof work with normal insulation boards that aren't foil backed?

[@johncooke5816]

Hi mate what size mm do you use for walls and what size for roof installation

[@davidosullivan3432]

nice well thought out fair play seems a very sensible method but how does the the fuse board get power? do you run an armoured cable inside the cladding also or do you have to bring it up from the ground .learning a ton from your videos thanks

[@thegardenroomguru]

we bring a 10mm SWA up the exterior wall under the cladding mate

[@AR_909]

Hey Guys, you mentioned about a different roof for an annex or a dwelling that will have higher occupancy or running water etc... do you have any plans to do a video of one as I'd like a shower/toilet in my build. *Edit* and would a build pack detail the different roof construction? Thanks.

[@TheMaverick177uk]

If you are putting a vapour barrier on what about when you put the lights through it does this not break the seal?

[@goodwin4924]

how are getting the supply to the garden db? Ie fed via swa from existing install in the house or Henley blocks and kmf switch out and split the tails ? cheers and nice work

[@thegardenroomguru]

Not looking in the house yet, if they have a spare way then it’ll be in their board, if not Henley block as you say mate

[@stevepereira9921]

Hi with your wiring system run externally does the electrician sign this off? as i would like to do the same thanks steve

[@russ67]

As a sparky it's annoying to watch non sparkies doing electrics, but like your build you obviously take care with what you do and I've seen worse done by fully qualified sparks. Although not perfect crack on. You know the dangers...

[@dwalsh3469]

What do you think wrong, and how would you change it? Genuine question.

[@markveganism5003]

Could I use 50 mm inbtje roof instead of 100mm ? Obviously it would have a greater air gap ,ambient temp ..what would be the difference? Great video again 👏

[@sadiewatkins92]

Nice video, if I foil taped gaps and wood can I still put vapour barrier sheet on or would I get condensation between the 2 layers? Kind Regards

[@thegardenroomguru]

No, it round be fine mate if your not sleeping in it or showering, lie occupy rooms is the key

[@edwardbroomhead4463]

Not the warm cold hybrid roof debate again lol some folk will never be satisfied but clearly works well 👍

[@SandyMiller737]

Think I understand the warm and cold but what is the hybrid please?

[@mikelewis5218]

Hi Liam What led lights are best using your 100 mm cut out in roof insulation Really love your videos, keep it goingMike

[@moedot7]

Hey Deadpool, how did you get the armoured cable into the building?

[@ayyazmirza]

Is the vapour barrier the GREEN 300 gauge 20 X 2.5M from Screwfix? According to NHBC should be 500 gauge. But I assume it doesn't matter for an outbuilding?

[@ROYALMENN]

Thank you for sharing, is Hybrid Roof will work, if people will live all the time?Thank you 🤝

[@howardbriggs3092]

Genuine question as I am doing my own garden room. If you are placing the light switch in the circuit between the fuse board and the fittings, rather than putting the live through the switch and joining the neutral in a junction block, would it be acceptable to use a double pole switch and simply put both live and neutral through the switch? (Sorry if my terminology is a bit off.)

[@nadeemkhan-nb3ew]

Hi, does this insulation have to be foil backed , or can i use polystyrene boards only asking as i have loads of polystyrene boards, and would lile to make use of them, thanks

[@AGRElectrics]

Im a sparky and if you can tell me no UV is hitting the PVC cable id be happy to sign it off all day long! Ive seen much much worse from apprentice trained sparks. keep up good work lads!!

[@rjkelectrical6086]

What zones are they running the cables in externally? That cable with only cladding on it, could be subject to extreme weather conditions which PVC isn’t designed for.

[@Don-xl7me]

Oh no gonna sit back n watch the comments 😂 but as ever fantastic video mate 👍

[@thegardenroomguru]

it'll all kick off soon enough :-)

[@garyflint1932]

Perfect video again Liam in great detail. Luckily my bezzie is a spark so I would get him to do my electrics. 1 question though, when you were describing the 1mm cabling, it was pinned to the OSB and you mentioned with the cedar on the outside that would give you 68mm depth (9m.56s into vid) and you have a drip loop. Could the 2.5mm cable not be tucked under both Slate laths at either the top or the bottom though to still give you the 68mm depth rather than pinned to the timber to only now give you 43mm (20m.33s into vid) depth once cladding is on? Forgive my ignorance, I'm not a spark (or a moaner or hater), just a chap who has bought a build pack from you and wanting to pick up as much info as possible :-) Cheers buddy and keep up the amazing work

[@thegardenroomguru]

yes mate, we normally drill through the 1st vertical batten to keep it back to the OSB but on this occasion we had snapped the 10mm drill bit :-(

[@derekhenry2053]

**grabs popcorn** straight to the comments ......... You can't please everyone Liam.

[@staceyismine]

I aways say if you dont like what i say dont listen to it..its that simple if you dont like it dont watch it🤷‍♂️

[@mikeoverthrow]

So does the hybrid roof method mean you don't need to ventilate the roof?

[@user-xt5ry9jp3r]

Like it 👍

[@pipsqueak3652]

Uv done a good thing, anyone who comments something bad now will get hammered by the rest of us lol

[@thegardenroomguru]

;-)

[@negara54]

14. 40 sec Could you not cut a circular hole for the downlight. This would halve the insulation needed to be removed. Also to ensure the insulation is tight up against the underside of the OSB, and remains in place, could some glue be used?

[@donaldmcintyre3990]

Hi Liam, have you tried Gapotape to go on edges of the pir insulation to give you an air tight fit rather than expanding foam, only an idea ,cheers

[@SandyMiller737]

Robin Clevett did a great video on GapoTape

[@tentonhammer5469]

I think that'll come down to the time it would take and what the customers willing to pay. Theres only so much you can do.

[@staceyismine]

What lights do yous use William

[@RoughRestos]

As an electrician, not too bad. But by running the cables on the external side you've actually put them out of zone, technically they are only permitted on the other side if the wall is 100mm or less where the zone get mirrored to the other side of the wall

[@ianfinch1522]

Just wondering if you have tried insulating the roof with 50mm pir leaving a void above with continuous soffit vents front and back to allow airflow

[@thegardenroomguru]

the level of insulation wouldn't be enough mate, as most of the room heat is lost through a roof

[@ianfinch1522]

@@thegardenroomguru fair enough mate we are looking to do a similar thing to you down in Essex so fully appreciate any feedback as we want to get this right from the word go. 👍

[@dsmith5395]

@Ian Finch Buy one of Williams build packs 😃

[@mgdew]

I think the only way to do that is have more insulation as Liam says, so you would ultimately need to increase the height of the joist to give a 50mm void above, then essentially turning it into a cold roof I think (I am no builder lol). In theory a 6x2 (150m high would allow for 100mm flush from bottom of joist, same cut out for lights he shows in the video, then 50mm space above which you would need to vent front and back so any possible moisture that went through would then vent through the draft, but again its another 25mm of space you need to factor on the overall 2.5m under permitted, and everything is a challenge. extra weight of the 6x2 also probably would need to be factored - btw, I am probably wrong with everything I have written here so don't shoot me... I am going to be doing my own and currently deciding on this approach or the hybrid, I like the idea of a warm roof but with 5x2 + insulation on top and 2 layers of OSB is just eating too much into the 2.5m overall.

[@ianfinch1522]

@@mgdew that’s exactly the approach I’ve been looking at using 150 mm rafters and in theory the pir could be increased in size to leave a 50 mm air space which is vented from the front and rear soffit vents through out. ( noggins at 90mm ) then I’ve found pre made light box’s to fit in the insulation (sealing the void) then vapour barrier then plaster board. Using doors at 1950 mm this stays under the 2500 permitted development. Liam has been doing this for many years so fully trust his methods but there’s lots of horror stories of failed systems from other companies on here.

[@deanhustings6047]

Well well well what do we say about this🤔..... Its a fine job!! 🤣

[@pseggons9512]

Electrically sound if unconventional. All I would add is to run the cables slightly up hill when penetrating the insulation, so condensation and any other moisture does not run into the sockets (water penetration through the cladding). Like the explanation of the build.

[@mikeoverthrow]

Another question, where do you put the connector block with the two Neutrals? is it inside the switch?

[@ursamajor6546]

Yes, inside the switch - (though I prefer Wago connectors - once discovered, you'll never go back to connector blocks again!)

[@leeg713]

Hi, do you ever put vents into the buildings?

[@RB-lt8kt]

Should the light fittings be capped?

[@peterreeder181]

Grabs the popcorn and waiting for the sparks to comment 😁

[@iansendall9368]

😄