How to create a stunning flat roof in 2023, how to build an extension step 4

In this video we will show you step by step, how to install a flat roof finished with flexible resin.
Thank you for visiting. I hope you enjoyed watching my video and I am looking forward to seeing you again.
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[@martindabrowa1565]

Thats not membrane mate😂 you need a proper VCL 🦆 vapour control layer if you’re wondering🎉

[@yesconstructionltd]

@@martindabrowa1565 I know what vcl is 🎉🙂 There was a general problem with building supplies at the time when this was built (COVID bull...t) The BC suggested this solution as we couldn't get the vcl. Thanks for pointing out mate, shows you know what you are doing 😜

[@rdev1696]

Very neat job but 1 question. Where you put the guttering on the roof, there's no insulation. Will this cause problems down the line? Like a cold spots?

[@yesconstructionltd]

Hi We have the 150mm Celotex wrapping the gutter from the bottom (in the ceiling) and overlapping it by 200mm, so there are no cold spots. Well spotted!

[@MattLeon-c2n]

You didn’t install a vapour control later before the insulation. This will cause interstitial condensation between the insulation and timber which is I’ll inevitably deteriorate the insulation and rot the timber. From the video you’ve adhered the insulation straight to the timber substrate.

[@yesconstructionltd]

Hi We did. Take a look again. We laid down the membrane before installing insulation. Building control had to see it as well to sign it off .

[@MattLeon-c2n]

@@yesconstructionltd I do apologise. I’ve seen the full video on your channel. What grp system did you use? Was it an iko product?

[@yesconstructionltd]

​@@MattLeon-c2n 😊 No worries We use RESTEC FLEX Brilliant gear. It's flexible www.roofingoutlet.co.uk/products/res-tec-flexitec-2020-resin-20kg?variant=39639333961799&gad_source=1&gclid=CjwKCAiA0PuuBhBsEiwAS7fsNS7o-wRchj3mTRQXsRa5H9FDxo4hojyn4jDOu1FPe4rm0gfnbRfT-RoC4s8QAvD_BwE

[@plummetplum]

Lovely job. Although im pretty sure that the membrane under the PIR should be a vapour control membrane and is mandatory for warm roof design regs not a luxury? Also what do those spiky joist washers do?

[@yesconstructionltd]

Hello mate Thanks for dropping by. This was done in times when it was very hard finding supplies. Could not find the VCB anywhere so the building control agreed on using a roof membrane. It's there to protect the plywood from condensation. The spiky washers (timber connectors) are to stop the joist from moving independently. If they move, they move together so they work like one massive beam.

[@plummetplum]

​@@yesconstructionltdThanks for the info 😊

[@Deanwhitfield]

Should have a proper vcl

[@yesconstructionltd]

@@Deanwhitfield We normally do, but at the time this was built we had nationwide problems with materials supply. The BC approved the membrane instead

[@Seqhael]

Hey man very informative video I am new to the UK from NZ and I’m doing a big renovation for a family friend. The building processes here are very different. Our roof is a cold roof, can you suggest to me how I use a VCL on cold roof without plasterboard screws penetrating it? What is the best practice here?

[@yesconstructionltd]

Hello mate Thanks 👍 You need to install the barrier onto the joist from the inside. Use 50mm double sided tape. As you tighten the plasterboard the tape will compress and seal the penetration (so they say) 😉

[@KilkennyLights]

What are the windows called. Special Glass name thanks Lads. Lovely work. Sure I suppose I could do it myself with a handy builder. What do ye think ? Frank Manning Kilkenny Ireland

[@yesconstructionltd]

@@KilkennyLights Thanks mate 😉 Skylight glass it is. Combination of two glasses glued together. One larger to cover the outside and one smaller to go inside. Wooden batten holding it from the bottom, covered with plasterboard. You can get UV reflective glass as well, it will help to keep it cool in summer. It's not hard. It's all about building the frame 6x2 joist. The glass gets measured, supplied and installed by the glass company. This video should be sufficient for you to understand how and surely you can do it 😉

[@gafffisher]

Do you recommend a vapour barrier on the skylight upstanding where you’ve you’ve installed PIR

[@yesconstructionltd]

hi We have a barrier as high as the insulation. There is no need to go above it, as there will be no condensation there. All the wood above it is cover with resin and flushings.

[@gafffisher]

@@yesconstructionltd I was told to put a sheet of visqueen in before the insulation but your Video didn’t show this. Thanks for the reply

[@kli309]

Hi, this is done very nicely! Is the glas glued only or is it also fixed with clips to re wodden frame? Thx, Jacob

[@yesconstructionltd]

Hi Jacob I am sorry, I missed your comment. I always try to reply to all comments. The glass is glued- two layers. One is silicones on top of the opening and the second letter is smaller and it sits inside on the frame so there is no chance for it to slip, fall etc.

[@ETB9090]

I notice your insulation stops short where you form your trough, which would create a cold spot, how have building control been about this?

[@yesconstructionltd]

Hi It is insulated from underneath with 150mm celotex. We overlapped by 200 so no cold spot.

[@ETB9090]

@@yesconstructionltd Cheers mate I was going to suggest the same and seal with expanding foam 👍👍

[@aaronmunden3069]

Enjoying your videos, keep up the great work!

[@yesconstructionltd]

Thank you 😊

[@franksexton4083]

Great job once again! Keep those videos coming with plenty of explanations thanks ❤️🏴󠁧󠁢󠁳󠁣󠁴󠁿👏🤙

[@yesconstructionltd]

Thank you very much 😊 Yes, I know I need to improve. I am preparing a nice video about silicone rendering where there is going to be a lot of explaining and talking. I know it sounds silly because I am talking to my own camera so there is no pressure, but sometimes I forget how to speak English 😅 I am getting better though. I appreciate your comment, thanks !

[@franksexton4083]

You’re doing great keep it up 🤙

[@colaistechiarain5768]

Very impressed with your work. Can I ask as to how you insulated under the gutter. Obviously there will be nothing close to the 150mm running down the roof.I know of some roofers who add PIR below the deck but others say this practice should be avoided.

[@yesconstructionltd]

@@colaistechiarain5768 Hello, and thank you for engaging We installed the 150mm insulation under the gutter so the roof doesn't have a cold spot. We overlapped it by 200mm just to be sure 😊 It was done under the BC supervision so this is the correct way.

[@zacayo8488]

Cost?

[@yesconstructionltd]

Do you mean the cost of the entire roof?

[@fazekaslaszlo]

Great video but tbh you’d struggle to find decent roofers like these guys and flat roofs are just not suitable for the UK climate, I have one and it’s a constant struggle with the element 😊

[@yesconstructionltd]

Hi, and thank you for engaging. There are many ways of finishing a flat roof. In the video we are using top quality materials and the job is executed properly so roofs like this should last a very, very long time.

[@abzcyclingadventures4918]

Great job, Done to perfection 👌

[@yesconstructionltd]

Thank you :-)

[@Alex-if3sr]

I know this video is old but what size metal beams did you use? And what was the length of the room?

[@yesconstructionltd]

@@Alex-if3sr Hi There are 7 steels all together. You can see how we are installing them in my other video from the same playlist. The main steel is 305x203 and 8m long It has splice on 1/3 and joining plates due to difficult access. In one piece, it would have been a nightmare to move around and install

[@AdrianWlodyka]

accurate and professional work, keep it up👍👌

[@yesconstructionltd]

Thank you Adrian

[@jilltyrell6741]

fantastic very useful video thankyou

[@yesconstructionltd]

Hi Thank you 😉 I am glad someone is watching it

[@KilkennyLights]

Frank here. Thank you for the prompt reply. I will use your idea. The video is great and gives me the confidence to go with a flat roof myself. Best of luck to you and your family in your new home. Cheers. F

[@yesconstructionltd]

@@KilkennyLights Thanks Frank Good luck 🤞

[@DICEGEORGE]

are those skylights double glazed with aluminium edges or what please? I need some !

[@yesconstructionltd]

Exactly how you described. The glass on the outside is bigger and the one inside is smaller so it fits inside of the opening. It's supported with a wooden frame inside and covered with plasterboard.

[@mrboyban]

Hopefully the customer didn't have any issues with the ceiling height....

[@yesconstructionltd]

It was a tricky one. The only way to achieve more height was to install a cold roof but this is not how it was designed by the architects.

[@jonathantongs1568]

Am I the only one who is mentioning the breather membrane being used as a vcl !😅

[@yesconstructionltd]

You are the second one actually 😉 This was the time when I couldn't get the VCL even online, and other materials too. I asked the building control and they said that the membrane is fine so we used it. Looks like you know the game, good on you mate 👍

[@robevs100ok]

why did you use shuttering ply instead of engineering or marine?

[@yesconstructionltd]

I was waiting for someone to ask this at some stage 😉 I couldn't get it on time from Jenson and Selco didn't have it either. I asked the building control if he is happy with normal ply and he was as long as we covered it with a membrane.

[@ETB9090]

Hi mate I can see that your not using thermabate type cavity closures around your openings are you using an insulated vertical dpc as a thermal break

[@yesconstructionltd]

Sometimes we do In this case we have the 150mm cavity wool coming all the way up and we lay down dpc on top to prevent any moisture penetrating through.

[@yesconstructionltd]

If you check my other video 5 leaking roofs(thumbnail) you will see that in there we used cavity closure. It's not a regulation to use the closures on top of the wall. You must use them around doors and windows

[@ETB9090]

@@yesconstructionltd Hi mate, yes I no that, I just couldn't see cavity closures or insulated dpc in those reveals, still can't to be honest, it just looks like you've returned the blockwork

[@yesconstructionltd]

@@ETB9090 I thought you were talking about the top of the wall on the roof. This is an unusual case. The bifold door is 3.6m, each section is 1.2 m triple glazed so very heavy. The door company suggested returning the brickwork in the reveal for strength. We then took this thought to building control and he blessed the idea providing that the client agrees. Later we glued insulated plasterboard in the reveal to provide some form of insulation. Sometimes we have to tweak the rules to achieve a greater goal and as long as the BC blesses everything, it's all good 😊

[@ETB9090]

@@yesconstructionltd well if BC have signed it off mate I suppose that's all u need, I notice you've done the same to the window, I get the reason behind it returning the blockwork, but in that situation I would of used Damcor or similar insulated dpc and still returned the blockwork as it's only about 20mm thick, you've had a very flexible BC officer out mate as I there's a lot that probably wouldn't pass that on new construction, on existing to mitigate cold bridging I've used 10mm aerogel in the reveals then bonded plasterboard to it, in all honesty I prefer blk returns it's a better fixing but use Damcor, anyway great videos mate, and thanks for taking the time to answer my questions, cheers👍🏻

[@oneinteriors5179]

Hi. Great job. What is the size of this extension in meters

[@yesconstructionltd]

Hi 6x8 m 7steels. It was a nice project 😊

[@bilpat5123]

Nice job👌, just out of interest would the box gutters which doesnt have insulation underneath cause cold spots inside the ceiling?

[@yesconstructionltd]

Hi The box is insulated from the bottom with 150 mm celotex and we overlapped it by 200mm. Building control wouldn't pass the job if it wasn't done. Well spotted! I like to have the gutter concealed in the roof. The extension looks a lot neater from the outside. Thank you for engaging 😉

[@bilpat5123]

@@yesconstructionltd hi, thanks for your reply... Nice work and videos, keep it up 👌

[@yesconstructionltd]

@@bilpat5123 Thank you 😉

[@dariuszgwiazdowskiqd1040]

professional job 👌👍

[@yesconstructionltd]

Thanks 👍

[@ferdousurbanowicz9180]

Amazing work 👌👌👍👍

[@yesconstructionltd]

Thank you! Cheers!

[@skrzypix]

💪👍

[@moksudkhan]

Excellent work!

[@yesconstructionltd]

Thank you very much 😊

[@tonygilmour9104]

Excellent job - well done

[@yesconstructionltd]

Thank you 🙂

[@nickbranch3588]

Great videos

[@yesconstructionltd]

Thank you very much

[@ablubliblabpablublu9066]

Dobra robota

[@yesconstructionltd]

Dzięki 😊

[@ianwebster652]

brilliant job

[@yesconstructionltd]

Thank you very much 😊

[@davidosullivan3432]

half the time lapse and more explaining the detail would make a better video . for example how you showed the connection for timber beams was informative. how is the osb held down ? screws what type of screw? how do you go about fixing the trims ? stick it nail it or screw it? fine telling us its done great but would be much better to tell us how its done . thanks

[@yesconstructionltd]

Thank you David for your honest opinion and I definitely take that on board. I am emotionally connected to the videos so I make many mistakes and I only see them a month later. It's also a confidence issue ( talking to camera) but I think I am over that now and I feel a lot more comfortable. You are not the first person saying this to me so I am reall trying now to take my videos from a different angle where I explain the stages, layers, materials etc. I will be recording how to apply micro cement in the bathroom and a double pocket door installation and I have plan to really go into details. Thanks again for the valuable comment

[@petersmrek7617]

Would be nice if you have put timber into the steel too and then rafters onto hangers not just let them sit on steel, lazy build 🫣

[@yesconstructionltd]

@@petersmrek7617 Thanks for the comment Yeahhh, the next one I've built was done like that. It's a long story why we didn't do it the way you say. I am starting a new extension soon and your comment motivated me to make another roof video, thanks 👍