Garden Room Workshop: Part 10. Warm roof

Find the full series playlist here: bit.ly/2BiLSyC
Part 10 of a video series about how to self-build a timber-framed garden room office (aka tiny house) /wood workshop in the UK.
This video covers how I built the warm roof.
The purpose of this video series is to provide all the information required for viewers to build their own garden room rather than just a montage of the building work. It took me months of research to learn everything in these videos so I hope to save people time and money.
The videos are a mix of theory and footage of the build including all the mistakes I made along the way. I am not a builder or tradesman, just a keen DIY-er with some basic tools. Everyone can do this!
In the longer term, I hope to turn this channel into a community for garden room self-builders and to eventually evolve into a woodworking projects channel - the real purpose of my garden room!
Garden room ideas: workshop, office, games room, cinema room, art studio, music studio, yoga retreat, spare bedroom, annexe or run a home business such as yoga classes or hair salon.
🌍My website - www.alidymock.com
📸Instagram - / alidymock
💌 Email - [e-mail]
Tools used:
Rope
Circular saw
Impact driver: www.screwfix.com/p/erbauer-er...
Hammer
Tape measure: www.screwfix.com/p/stanley-ty...
Pencil
String line
Ladders
Tarpaulin
Spirit level as a straight edge
Sharpie pen
Safety: gloves, eye-wear, ear protection, dust mask
Materials used:
18mm OSB3
11mm OSB3
Screws 50mm
Nails 50mm
100mm timber
Polythene vapour barrier: www.wickes.co.uk/Wickes-Green...
Polythene tape: www.screwfix.com/p/polythene-... PIR insulation
180mm slab nails: www.builderdepot.co.uk/speed-p...
Rag 'n' Bone Brown youtube channel:
/ @ragnbonebrown
Good websites to check prices for materials :
www.selcobw.com/
www.builderdepot.co.uk/
Music:
/ aka-dj-quads

[@kevinchamberlain7928]

It's clear you're not a pro (we have set methods common to us all but you do things a little differently) but having said, that, you are most definitely a natural! With over 33 years experience of carpentry and joinery behind me, I am utterly impressed and have learned from you! Thank you!

[@jimh2048]

Great job Ali. Thanks for sharing your experience.

[@laneyweb]

Thanks for the latest update Ali. looking forward to seeing the next episodes and the eventual woodworking projects. Glad to see the new boots!

[@AliDymock]

Haha the boots were well needed. Got them for my birthday. I'm looking forward to doing some proper woodworking too!

[@paulfearns7132]

Coming along very nicely and loved the top tip on carrying 8x4 sheets looking forward to watching part 11 another big thumbs up:)

[@SwiftFury21]

Loving the series - can’t wait for the next instalment. Thanks Ali

[@AliDymock]

You're very welcome Kevin, glad you enjoyed them :)

[@backyardstudioslondon1275]

This video series is amazing Ali thanks for sharing!

[@MURRAY91ful]

Cheers mate, I'm an extension builder putting my hand to a warm roof for the first time, video gave me everything I needed to know 👍

[@PhG1961]

Awesome build ! Great video ! Tnxs for sharing ! I've almost finished my build and while finishing the roof I picked up some ideas of your construction.

[@bwgreen]

Keith sent me here too - had a great time watching the back-episodes and always looking forward to the next. Great work, especially since you're doing most of it solo.

[@1DayInTheLifeOfA]

Cannot wait for your next video, using these as a template for building something smaller in my own back garden.

[@paulnann2572]

Keep up the videos ali! Im doing a slight extension and new roof to my garage next month but will involve stud walls and 9x2 roofing so this has helped!

[@jordanallison7105]

Rag and Bone recommended you and I watched all of your workshop videos over 2 days and was left hanging for more! Thumbs up from America.

[@AliDymock]

Thanks America ;) I don't post as regularly as other channels but hopefully will get better once this series is complete.

[@RestWithin]

Great video, excellent presentation. Love the music too. I’m a over the hill woman trying to tackle DIY projects by myself. Thanks for the clear explanations and speaking audibly.

[@AliDymock]

Glad you like :)

[@timmade]

Amazing I have literallyonly just finished watching the previous video and was gutted that I had to wait for the next one. Brilliant!!

[@MoneyRazorVEVO]

what an excellent video series, very well detailed and explained, thanks ali, will be building mine soon

[@andreeward5879]

I'm 33 female from sunny Florida , USA. Love your stuff!!!

[@chazzyboy]

Just have the concrete slab laid for my garden room, will be following your videos closely from this point

[@davecroden9793]

Great video- at last one that helps me !

[@phildowling9723]

Great series, really helped me in my build, thanks

[@TheMrSwilly]

Excellent and informative cheers!

[@Cradley684]

I'm a big fan of Keith's been watching him a bit now, but it as also been very interested in your video's too Ali can't wait to see the next video of the build, Oh and course Keith's video's as well you young guy's make it really interesting for us pensioner's take care now.

[@AliDymock]

Cheers Brian! Glad you're enjoying it!

[@MrAllister88]

I subbed after finding you through my efforts of soundproofing. You gave me the confidence to undertake the project! Thanks!

[@engr810]

Very detailed and nicely presented

[@erwindaveg1]

Great Video!! I love it!

[@postman445]

Brilliant video

[@claudioscola]

Great video series.

[@ZacJones]

Great video! I started with this part but now I need to go back and watch the other 9!

[@AliDymock]

haha hope you enjoyed them! I like the look of your channel, just the kind of projects I like doing. Will watch some in due course.

[@EASYFLASHLTD]

One word mate “fantastic “

[@balrajmaan467]

Bad ass video log, exactly what you want and occasional discount and tips not to repeat errors for humanity, well done

[@rubel247]

great job mate and thanks for sharing and great video

[@FredWilbury]

Watching this for some ideas fir reroofing my modelling shed 😊

[@annapetrosian6696]

Lovin details much love happy healthy new year my darlings

[@lowbonnet72]

Very good, detailed and informative video! Thanks a lot from Holland.

[@AliDymock]

You're welcome, from England.

[@TheZGALa]

Thank you! I am looking forward to watching more of this series in preparation for redoing my flat roof. Nearly 50, female, btw. I appreciate your tips on how to do things efficiently as a solo worker.

[@AliDymock]

You can do it Gabrielle!

[@threepennypirate8529]

I’m. 62 female stated building the shed/garden room when my husband died just to prove to myself it’s all possible. Best investment was a block and tackle, I have both a rope one and a chain one. Both were around the £100 mark. New but as with all things you may be able to find the engine block one second hand . The other investment is a sheet carrier, it a trolly for sheet material, I found that it’s not so much strength that holds me back but my height and therefore reach, lifting sheet a is possible but carrying it even with Ali’s rope trick was impossible as I didn’t have a long enough body! Good luck Gabrielle, go for it girl.

[@martinballard2392]

I have just discovered this series of videos and you (Ali) should be very proud of what you have achieved. A great, simple to understand and realistic set of videos. Well done 👍

[@mariah4451]

Another incredibly informative episode - I'm gripped :-) If I'm ever lucky enough to take on a project like this I'll be using this series as my step by step guide. Thanks for sharing such valuable knowledge and know how :-)

[@AliDymock]

:) Perhaps I’ll share some smaller projects when this is done. What would you like to see?

[@alanbigger4889]

Nice to see someone doing things well without adding all the jargon, great explanation of your method, good method too, this is how I do a warm flat roof also.

[@elijah2280]

works well and good qualitiful shed building guild

[@carlbaldwin8972]

Your video was clearly what I was looking for as I am getting to within 90 days of low pitch roof construction of private residence..here in s.central fla..vapor barrier explained..I am now going to spend the necessary $ at home depot for you much appreciated works you presented

[@paulboyle9605]

Brilliant again Ali, loved it. It’s great to see the transformation after each episode. Really enjoying this, so keep up the good work and congratulations on the subs !! Regards Paul

[@AliDymock]

Cheers Paul, nice to see the same people returning :)

[@tommyoxley7436]

good stuff bro! very informative . really enjoyed it the videos so far! :)

[@DJ-uk5mm]

Superb

[@MadazzaMusik]

Glad I found this chanel I'm doing one myself and am at the insulation stage. Expensive stuff but want a log burner in mine

[@AliDymock]

Nice, I nearly went for a wood burner myself.

[@johngawi3426]

Thank you for the vedio , very informative 👍

[@anzalmusejee842]

Great work... and Very impressive channel

[@AliDymock]

Thanks :)

[@franciscoromerofitness]

Part 11 please! good job!

[@M-ANTONY-888]

Brilliant

[@jimyl77]

this really is impressive work, and mostly working on your own!!

[@AliDymock]

thanks Jim! This series has proven more work than the actual build though 🙈

[@jimyl77]

Im grateful to you for the effort, im hoping to do something very similar for myself and this has given me time inspiration!

[@addisonduggan9551]

Nice one geezer :)

[@JasonShowell]

Everything you have done in your videos I have done plenty of times before. Some I do slightly differently but what I found to be the best thing you did and something I haven't seen elsewhere, was to list plenty of UK regs and also the differences in styles or techniques. I have actually given your videos to a couple of clients and told them to watch as you explain this stuff in a easy to understand format and it saves me going through it with them :) It is also interesting to see your results with minimum / cheap tools rather than having the entire tool shop like the Americans tend to have. I look forward to seeing it finished although I don wonder what you will tackle (or have already tackled) next?

[@AliDymock]

Wow that's great, I hope it's of use to your clients. I guess the most 'useful' video to look at options is Part 9. There's so many methods of building a garden room but I think the majority of my build will suit a novice. It's hard to know which order to do things but you'll find out soon enough which is the next task I took on 😉

[@MrLoderX]

Great videos. I'm planning a similar build and have found your videos invaluable, they have given me the confidence that I can complete my planned build. Looking forward to the next video.

[@jammer5007]

awesome Ali! Suggestion for your channel.. there’s so many that cover projects that are unique and creative but be great to see practical projects in the house.. just a thought. Great work.. tough foundation dig on mine.. found an out building under the soil at the back of my garden.. so getting to the subsoil has been a right pain but now it’s mortaring the blocks!

[@AliDymock]

Yeh I think that will be the general direction of the channel, creating things and doing projects that I need doing whether that's furniture or renovating. Thanks for the idea. Cool! Just think-it's a great workout and you're being productive at the same time! Worth taking your time over the blocks, probably the most important part of the project!

[@redseantlworld]

Surprisingly the UK sets the standard and all others follow suit. I learnt this at college whilst doing plumbing.

[@tomvincent5596]

Good work. As for fixing the 11mm osb and avoiding thermal break. You can use thermal sleeved fixings.

[@AliDymock]

Good advice, I didn't know they existed at the time.

[@phatphil55]

Fine business. My garden room blocks for the base are in and my subframe is going down tomorrow.

[@AliDymock]

Good stuff, that's what I like to hear!

[@cleitonfarli9479]

Ola amigo great content I’m about to attempt doing a a gym in my garden and I start learn a lot from you I will be doing my self

[@AliDymock]

Go for it!

[@DaveBoatBuilder]

Looking forward to seeing how you put in the windows.

[@AliDymock]

That'll be Part 12 :)

[@supernova8962]

I know this video is some what out of date... BUT YOUR A BEAST to do the work by yourself. !!!! I APPLAUD !!!

[@AliDymock]

Ha, thanks. Anyone can do it though!

[@Andrew-pn3bx]

Ali thank you ! Your videos have given me the confidence to build my own garden office. I'm currently well into my project and each of your clips have been an invaluable source of reference to guide me throughout. When is part 11 being posted ?????

[@AliDymock]

That's great :) Part 11- this week!

[@mohamedal-ghaban1798]

You should deserve a medal for this amazing works. Surely this knowledge and experience after years of headaches of fixing idiotic roofers who doesn’t have a clue! Well done and keep the hard work

[@AliDymock]

heheh thanks!

[@michaelord8084]

Excellent series of videos mate hats off to you, I'm currently having a Buy v's Build debate with myself and this gives me a lot of food for thought :)

[@AliDymock]

It's a tough choice for sure. I would say that if you enjoy the thought of building your own and generally doing DIY/using your hands then take it on, you'll get a better end product. If you value your time for other pursuits and have the money go for the buy. Hopefully these videos tell you all you need to know to build or ask the right questions if buying 👍

[@michaelord8084]

@@AliDymock I love the idea of building one and wish I'd started this process at the beginning of lockdown, hindsight is a wonderful thing. I don't think I could build one cheaper than I can buy one bizarrely and that's like for like spec wise, I'd want to upgrade a few things so all adds up 😏

[@elmafudd9703]

Insulate the edges before OSB work I always find is best practice. good to see its not just any old plastic you are slapping down there.

[@zbiku82]

Finally! Waiting for next part was worse than waiting for another episode of Game of Thrones! Great job Ali

[@AliDymock]

I know, I'm super slow! My plan is to finish this series before GRRM finishes The Winds Of Winter though! 😋

[@GoExperimental]

What is the thinnest insulation you could get away with and it still keep the dew point above where it needs to be? I'm building a garden room that has to be 2.5m max so I want to go as low profile as possible. Thanks

[@AliDymock]

I think even 25mm will do quite a bit, 50mm is a nice depth for warmth. If you're really struggling with height I'd go with a cold roof and go thick - 100mm+

[@GoExperimental]

@@AliDymock Thank you for taking the time to reply, it's most appreciated. I can get away with 50mm yes that would be okay. Yes the cold roof option is still on the table I just don't want to mess it up by not having sufficient ventilation and the warm roof seems a bit more foolproof ha. Thanks again.

[@matthewsaunby9056]

@@GoExperimental the ventilation is pretty easy, depending on what you are planning, I’ve just done a cold roof on a 3x5m workshop, left overhangs on all four sides, although really front to back is the most important. I then clad the soffits of the overhangs with recycled pallet wood (although you could use any sort of wood) and left a couple of mm between them to allow airflow above the insulation :) Good luck with your project

[@GoExperimental]

@@matthewsaunby9056 Thanks for the advice, Matthew. I'll give it some more thought. Cheers

[@mattturner6124]

Go Experimental nn

[@kirkcapper1638]

I don’t normally comment on things but thanks for all the help I’m thinking of building one for the kids and you’ve got the best videos I’ve found when’s the rest coming 👍🏼

[@AliDymock]

Well thanks for making the exception this time, much appreciated. Lucky kids! I'm just waiting on something before releasing Part 11.

[@grahamb1]

You may want to consider a suggestion. To save the problem with matching up the board size with the joist spacing I use tongue and groove OSB. It gives a stronger structure even If a space it 2mm to allow for thermal expansion.

[@AliDymock]

Yup, definitely the way to go, I think I make that revision in Part 16.

[@rdelmb8452]

New boots!

[@TheTimutube]

If I lived nearer I would have gladly helped you with the lifting as I always seem to work on my own so know how you feel.Tim

[@ryancarpenter9940]

Great video 👍🏻 only thing I would say is if you want to use GRP you want to use a 18mm P5 t&g flooring board as the top layer. 22mm if it’s a balcony. This eliminates the need for bandaging the osb boards on the joints prior to laying the chop strand matt. I would also use a 225mm double thread screw so they countersink into the boards. It’s nice to see people take care installing the vapour barrier too as this sometimes gets overlooked on sites. Keep up the good work Ali

[@AliDymock]

Great advice here and I agree (I think I mention going with T&G for the roof in Part 16), i just did the best I could at the time with the knowledge I had. I think have thermal break helix screws would have been a good idea too. What thickness of OSB would you recommend for joists spaced 600mm apart - 22mm or will 18mm still suffice if it's not designed to be walked on after installation?

[@ryancarpenter9940]

@@AliDymock if the area was used for any foot traffic it should be 22mm. A OSB board has a larger span of 600mm for joist where the P5 is 450mm. Personally I always do joists at 400mm centres anyway as it’s more suitable for plaster boarding on the inside ceiling and strengthening the roof to avoid the joists sagging over time causing pooling on the roof. Doing a warm roof is always a stronger option anyway so span gaps do not matter as much on the top layer providing the sub deck has been installed to the correctly to board specifications. When installing P5 boards for GRP you install them upside on the top layer. This makes the lower joint tight but leaves a 1-2mm gap on the top side allowing GRP resin to penetrate the joint to locking the boards together and creating a great key for the roof. Like I said before keep up the good work your videos are very helpful to people who may need help installing these roofs the right way. I see way to many times on what happens to poorly installed or incorrectly insulated roofs ! It’s very frustrating and costly to the customers. Thanks for taking the time to make the vids. 😁

[@dancinggorilla7]

You don’t need T&G if you bandage your joints. Again what a way to waste money

[@real_wakawaka]

nice vid! just to point out never cut the vapour barrier like you did. You must overlap over the insulation. Where you had the wood on top and the insulation in the middle you should of overlapped the wood back onto the insulation and taped it on. Then put in osb on top. Then around the edge put in the membrane if needed or upvc.

[@timmo5443]

Brilliant !! well done, if i can just say never walk backwards on a roof.

[@AliDymock]

Wise words!

[@forecastdrums]

Ali, i'm 28. Coming to the end of a year of a full house renovation top to bottom and finally getting to move my workshop to the house. Currently have a very old and tired prefab garage that i'm replacing the asbestos roof with a full timber flat roof and it's been a bit of an engineering feat. I'm about to kick off and watching this series if quick succession has really helped reaffirm the plan I have is both correct (and safe) as well as realistic so I just wanted to drop you a quick thank you and say great work on both the build and the videos.

[@AliDymock]

Thank you, that's great to hear you were thinking along the same lines.

[@rhyswilliams2149]

Come on Ali, we NEED the next video!!

[@AliDymock]

haha, I know. It's pretty much there, I'm just waiting on something first! Sorry!

[@marianhrubypumper4092]

For the numbers I am a 72 year old woman from mex . I love your channel hop to see how you fix it up inside the placing of the woodworking tools etc.

[@AliDymock]

Excellent - nice to have a variety of viewers! It's a good idea, once the project is done I'll do another playlist on setting up the workshop. I'm definitely thinking along the lines of french cleats for a lot of my tools :)

[@G1V3Y]

I know this was 2 years ago but just found your channel and you have gained a new sub 👍

[@AliDymock]

Thanks Ben. 2 years old but still another few vids in the series to go heheh.

[@G1V3Y]

Ali Dymock just gonna binge watch them all as I have nothing else to do 😅

[@AliDymock]

@@G1V3Y Haha enjoy. You can take solace that they took a lot lot longer to make than they do to watch! I'm up to Part 16 and then there are a couple of 'extra' ones clarifying some topics I saw people having problems with :)

[@G1V3Y]

Ali Dymock That’s good to know that your dedicated and still putting in the hard work and effort and putting these so far great videos out and I’m a younger viewer only 16 so I’ll need to wait a while before I’m able to build something like this on my own sadly can’t wait for the day I could build something like this. And sorry for any spelling mistakes and grammar I’m dyslexic so isn’t the best

[@AliDymock]

@@G1V3Y I've always thought that for a teenager to gain their own space and then have somewhere to live in their early 20s when saving for a house deposit, a garden room in your parents' house is ideal

[@whyfearfear82]

another informative video. I have to admit i didn’t really understand youtube until i started watching your channel. I was of the opinion that it was all about funny animals, people watching people play video games or kids opening stuff. This series has been really informative, along with some of the other channels you recommended. thank you for the series. On the back of them, like one of the other posts, my foundation blocks are down and timber floor about to be constructed. The remaining question. warm or cold roof. Just can’t decide. Thanks Ali

[@AliDymock]

haha I guess you'd be right but there's a plethora of other stuff out there. You might like April Wilkerson's channel-she's recently done a series on building a humungous workshop in Texas. Warm/cold roof is a toughy, you'll need to decide before you start the walls though!

[@Senna-xi1gr]

Ali brilliant video but not sure about music 😂👍🇬🇧 Great work.

[@AliDymock]

heheh fair enough!

[@nesshead3051]

I've watched these sssoooo many times it's a wonder I haven't squed the figures😁

[@gordonchapman222]

I've just watched the series up to here Ali, I am so impressed. It's not just clips of you sawing wood and hammering nails, it's you sharing your research on building regs, insulating tables, advice on lumber buying and much more. Not only that, your production... sound, camera and editing etc is top notch. So I thought I would make this comment -I know you didn't make channel for the money, but rather to share you experience to help others and lets be frank it's always great to have an appreciative audience for feed back and advice. Anyway, the comment is this - Are you aware that Amazon is scouting for good quality videos (they already have a few KZbin channels on Amazon Prime) such as your series? I don't know how much of a return you'll get monitory wise, but if you get a wider audience, whats the harm? Make a few enquires, mean while, I'm off to join Ep 11, again, thanks for sharing 👍

[@AliDymock]

Thanks for your comments Gordon! I've tried to make the videos as good as I can but still a bit embarrassed by the earlier videos heheh. I highly doubt Amazon Prime would want this series but hey, I'll check it out! Thanks for the tip 👍

[@gordonchapman222]

👌

[@leegunnerz1830]

What a CHIPPY!💪🏽💪🏽🙌

[@AliDymock]

:D I'm certainly improving, way off professional standard though!

[@leegunnerz1830]

@@AliDymock I've literally stayed awake all night watching the build mate 💪🏽looks amazing

[@Chrismartin88]

Stagger seams in the kingspan also

[@thetravelboss7820]

Thank you Ali, You helped me build my dream. I have a static caravan with an extension. I used this series to help me. LOVE YOUT WORK MAN! RESPECT

[@222rich]

ace vid, will be using this for my lodge 40' x 14'. my lovely wife refuses to live in a ready made mobile home

[@blisteredfingerz]

2:09 Spirit level 😂

[@alexramsay8904]

Thanks for much useful advice! I'm wondering about finishing my roof with corrugated iron or similar - I'm guessing I could waterproof the top deck with a membrane of some kind and then fasten the corrugated iron to it - would that work?

[@kennyriley1976]

When’s your next instalment Ali? In the process of designing my garden room just now, interesting to see how you finished off your roof and fascia! Keep up the good work, loving the series so far

[@AliDymock]

Hey Kenny, I'm just waiting on something before I can finish the video. Glad you're enjoying it so far, sorry about the wait!

[@llisntcoolj2375]

I vapour barriered across the roof joists before laying the sub deck, so I could glue the kingspan to the sub deck, then used 18mm Osb t&g boards, again glued to the insulation. So no need for the long screws or thermal bridge.

[@AliDymock]

Nice! What kind of glue did you use Lee?

[@llisntcoolj2375]

@@AliDymock I used Illbruck CT704 contact adhesive

[@donwill575420]

Thanks for another great video. We are building a cabin in our garden (for us to live in whilst we do our house renovation) and trying to do as much ourselves. We have got a builder to do the main construction. The builder has done a cold roof, but not put OSB boards on top. He has a membrane directly above the joists (where the insulation will be), the battens, then our metal roofing will go on top of that. Im a little confused as I thought you would always have boards on top of the roof, but I guess this way you solve the issue of ventilation/allowing vapour to escape? For peace of mind can you confirm you dont need OSB boards on top? Thanks so much!

[@lillylomax2296]

Ithink this is what Ive been looking for. Thanks a lot. So it doesnt mess up your stats this isnt lilly its her Ddad I don't know how to change it . Like the tips especially the string to nail into rafters

[@AliDymock]

Lilly - tell your dad to get his own google account 😂

[@gwilko6452]

Also vpc should lap up the sides of the insulation around perimeter

[@AliDymock]

Good suggestion 👍

[@TheChief1111]

Completely new to all of this, your videos are very informing, thank you soo much. I am planning my own garden house atm and was wondering if, when i use a wool insulation on the roof, can put lathing over this somehow to be able to attach the top layer of ply wood

[@AliDymock]

I don't think I've grasped what you mean. A cold roof is probably the only way to use wool insulation, not a warm roof like mine. I explain the difference in Part 9.

[@allanhowe6569]

Very helpful walkthrough , just what I need to build my home office. One question did you leave a 3mm gap in the 11mm top osb as well ? Thanks

[@martinjvillasenor773]

This guy is a dope!

[@AliDymock]

you mean IS DOPE, surely!?

[@Palo-jm7xc]

Looking good Ali. Coming along very nicely. Just one thing though. Why didn't you use tongue and groove OSB on the roof deck on top of the PIR, especially with a EPDM? You should have used T&G on the sub-deck with glued T&G and tyvek underneath. Then PU Glued the PIR insulation down to the sub-deck. Then done the same with the osb sarking covering the PIR insulation so no fixings needed. Doing that would eliminate the unsupported edges and prevent movement meaning its less likely to puncture the EPDM. Now when you walk on the roof with the membrane the Insulation will compress a little and the nail heads will pop up a little and pierce the EPDM. BTW i'm not trying to put you down as so to speak as i think this little series is great and very informative. Maybe you have a good reason for what you've done.

[@AliDymock]

Nah, it's cool, we all learn from the comments. T+G was a little hard to find around my area but I agree it would have been nice for the top deck but not a necessity. As for the tyvek under the sub deck- you must mean the vapour barrier? I've never seen the VB under the deck. You can get liquid VBs (at vast expense) that are spread over the sub deck and yes you're right that the insulation can be glued down on to that, but it would be pointless to glue on to a polythene VB, but yes, the top deck can be glued rather than mechanically fixing with slab nails. There's definitely no risk of the EPDM puncturing though-PIR insulation doesn't compress at all when it has sheet material over it. I've walked all over it and the slab nails are in the exact same position as they were in this vid. Of course, there's more than one way to skin a cat!

[@richardcowell5845]

Great series. Im taking the plunge myself. Quick q - in your design video it says you'll use plywood, but you went for OSB. Did you work out that OSB was strong enough etc?

[@markbusby1446]

Great vids...Surely though you pre-cut osb roof sheets before raising deck to top of walls. Avoids unnecessary cutting at height?🤔

[@AliDymock]

Yes that would have been smarter.

[@daviddredge1178]

So professional. Excellent work. Quick question - why do you use both screws and nails? I'm sure theres a good reason!

[@AliDymock]

heheh I think in part 5 I talk about the pros and cons of nails vs screws. In this video I used screws to keep the boards tight and nails in between as they are cheaper! You can use either but I'd recommend a few screws per board at least 👍

[@deanscaife840]

Hi great build. I’m looking to build something similar. Can I ask what size timber you used for the roof joists?

[@DawidhabdArup_N7]

I came across you from Keith, so its nice to hear both you complement each other. Watching your this enormous garden house, I am kinda fighting how I can convert our *_shed_* to my *_studio_* as its fairly big in size. I am also *_disabled_* , so getting it done such a massive scale I wouldn't be even do the floor. Any *_ tips on_* this please how I can convert my Garden Shed to my mini workshop as well as studio for my channel. Have a look at my channel, and please let me know how I can improve to get noticed, as I probably am trying too hard for fineness. I live in Suffolk, perhaps close to *_Keith_* , unless you are closer if I knew where you live (County)... Anyhow, please look after yourself and each other & Stay Safe. I believe " *_Our World_* is a *_Shared Experience_* ." Cheers...

[@AliDymock]

I definitely think you can do something with your shed to make it a bit cosier for a workshop even being disabled. I would look at installing insulation on the inside between the studs (even if they're only 2 or 3 inches thick) and then put ply or OSB over them so you can attach your tools to the wall. Then get an electrician in to add lights and sockets and a little heater and you'll be ready to go! :)

[@madmilner78]

Hi Ali, love your videos mate, so much detail! I have just purchased and built a log cabin. I was going to build from scratch but found a good deal. So I’m insulating my roof with celotex. Currently I have just the roof boards(only finished them today). I can’t help think that the vapour barrier could cause the wood(roof deck) to sweat. Or is it that it won’t because it’s on the warm side of the insulation?

[@AliDymock]

Cheers! As long as you are doing a warm roof like mine the sub deck will be warm so no condensation or 'sweating'. It's worked well for me so far, no issues at all. hope that helps!