Warm Roof Extension - Part 5 VCL, Insulation and rubber roof
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- Опубліковано 6 жов 2024
- In this episode we fit the the vapour control layer, insulation and the install the rubber roof. We cut and fit the plywood to carry the fascia and get ready for the guttering.
I'm just in the process of doing this for myself.
These warm roof videos have helped me no end..
Thank you.
Forgot to mention in last post - have been watching this build and previous builds with great interest, thank you Adam, Richie, Mick for taking the time to put these videos together. with regards to the fully filled cavity - I know from building my single skin extension at home, the brickworks gets quite wet on the inside after prolonged driving rain and as the insulation quilt is in contact with the outer leaf this will also get wet - is there a danger moisture could track across to the inner leaf? On my single skin WC extension I left a 50mm air gap then studwork sheathed in dpm, inside the studwork I put 75mm Celotex, then 12mm osb covered in upvc decorative boards - this was all as advised by the Building Inspector - I am confident that no matter how wet the inner face of the brickwork gets, the strudwork will stay dry, just to add - at the bottom of the brickwork I used 18inch dpc lapped up the studwork with the studwork dpm dressed down over the outside edge of this dpc so if any moisture runs down the brickwork, or any condensation forms on the dpm it will drain out via the weeps. A good coat of Thomsons Water seal on the external face of the brickwork will also help keep the wall dry.
Well done guys. Lots of progress. Mick has the same temperament as myself. Middle age grumpiness 😂😂. 👍👍
😂 I know he plays up to the camera though which makes it more funny for me. 👍🏻
kingspan thermataper comes with tissue face to bond edpm directly onto. saves the double boarding and messing with firring strips.
Not something I’ve ever used I’ll have to have a look at it but I think I’d be uncertain as to the bonding of the rubber straight onto it. I presume you put your thermal fixings into it to hold it down the same way as the Ply?
The cold OSB on top of insulation will be vulnerable to rot out from condensation. Best hope VCL is a vapour barrier rather than a vapour control layer.
I hope the customer has got a good supply of lights bulbs for that lounge! they are going to be on 24/7! it looks like the black hole of Calcutta in there! incidentally what are they going to use the extension for? it just doesn't look big enough to do anything with? especially with the new regs 6 inch cavity,
yes I hear you say - the customer is always right!
Your last sentence says it all mate. What can I say 😂👍🏻
I definitely recommend tongue and groove OSB3 sheets for rubber roofing becase regular sheets will often be slightly different thicknesses and this results on a very noticeable bumpy line on the join. Also make sure you sand all the screw holes and bumps properly or they will show. I used 1mm skyguard rubber which is a bit thinner though and primarily for sheds and it’s harder to use
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16:49 😅😅😅😅😅😅😅
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Exellent job great description.
It does look like a substation now but I'm sure it will look great when done.
Funny you should that Western Power are in next week fitting out
@@mrabuilders6723 😂
Looking good
Out of interest how did you resolve the cold bridging above the cavity wall insulation to the deck? I may have missed a video update, but wondered if you had to lift the deck again to insulate or not.
Looking good,
Just buttoning up a mammoth roof build ourselves, waiting for scaffolders to arrive to dismantle today. 🤞🤞
I'm planning to squirt phone down the black plastic fixing thingys after theyre screwed in...
and maybe some sticky vapour barrier on the vertical sides of the kingspan
It’s not gonna hurt anything but I’d say that’s definitely over kill mate. Butt your kingspan and make sure they are tight and silver tape the joints. No need for foam in the thermal fixings. Hope your project goes well 👍🏻
@@mrabuilders6723 but wont damp air trickle in the end side of the kingspan and condense over time? I know you have done it how others do, but I may have found a hole in the method.
Went OTT with ours. Marine Ply on top of the insulation - roofers loved it though
I use a company called Fixfast for the tube washers and fasteners. They are very efficient and the kit is very high quality. I buy fasteners long enough to fix into the joists and not just the deck or firring. IKO fast drying primer on osb before vb. Fill the washer voids with foam for max thermal efficiency.
bless you! great work, thanks for sharing
omg you Brits and your insulation with hidious boxes tacked onto back
Malcs in Perth WA ♥️
Roof looking 👌
Nice job Hartley lad, how’s Jasper getting on with his house?
Are these nicknames you’ve created for us on the channel?😂👍🏻
@@mrabuilders6723 Jasper carrot 😂
I had a builder round for a quote for flat roof extension, I’m a keen DIYer and have an all flat roofed art deco house so made it my business to learn how warm roof are built and this builder who has a very good reputation tried telling me you dont need a VCL on a warm roof, when u know you should do but not in a position to argue my point not having any experience in it so i told him what i thought but let it go, i actually really like the firm and seem a shame to not use based on this one point but it makes me worry about what else he doesn’t know, i mean his so knowledgeable i was shocked he doesn’t think its needed.
You 100% need a vcl for a warm roof. If I'm honest, the only material I would use is alutrix 600 as a vcl.
Hmmm - no primer on the vcl and a top deck of ply on a warm roof are big no no’s in my neck of the woods , tr27 insulation and no deck on top to avoid the dreaded rot
Hello Ian, hope you're well mate. When you say rot, how would that happen exactly?
@@mrabuilders6723 the top deck of timber needs 20mm of cross ventilation in order to dry out after freezing temperatures ie a cold deck style - the only truly warm roof is membrane directly bonded/fixed to the correct insulation
Google has tons on this plus if you search all the main roofing systems ie sarnafil/danosa etc they have the regs on build ups
Great job and very well explained.
Blinding job as always lads
How did you connect the cavity insulation to the ply underneath the roof insulation? It seems like there's a hollow space there that hasn't been filled with insulation?
Definitely agree there is no plywood in osb
Super impressed mate, a cheeky question, how much would a 3 x 3 extension cost from start to finish using the same materials, gives me an idea for my new house that i will be moving into in around 2 months.
Think ppl saying 2-3k m2 now I think. Which I think u be looking at higher end now tbh. Prices for materials still not favourable 😒
This is really interesting and I have a question/ observation. Before sealing the rubber roof, do you not fill in the screw holes, the big plastic tubes that holds down the insulation and any gaps in the wood? This would lead to a fully flat roof. Cheers
Hi Peter. The plastic tubes are thermal break fixings designed specifically for this type of install so no need to fill them in. I could agree with you that they do produce a bump in the rubber but these are the fixings we have to use to do it properly. I’m not concerned about the thermal break fixings or anything else having an impact on the fall of the roof because I have designed in enough fall for no water to be able to sit on this roof. Thanks very much for commenting and watching our video. Enjoy the rest of your weekend 👍🏻
@@mrabuilders6723 Thanks very much for taking the time to reply. I'm just a DIYer and having to replace my 12 ft x 10 ft shed roof due to a leak. I have added OSB and now ready to fix the rubber roof, which is why I asked the question. Thanks again and hopefully this storm doesn't stop you from working.
What about the cold bridge at the top of the wall where it meets the roof? Did you put insulation in the cavity to meet the roof? Because if not, when you put the insulation on the roof you’ll have a big non insulated gap between the raters, from the roof to the insulation in the cavity.
Are you not primer before viper barrier roll off?
great job gents, could i ask what type of vapor barrier are you using ? thanks
Hello, on this project we used an unbranded bitumen based foil backed one. It's identical to Alutrix 600 in everyway but the price!
@@mrabuilders6723 thank you
Great job guys. Which vapour barrier did you use?
i think there's meant to be 5mm between the osb boards ?
Hi there, what are these thermal fixings called and what size would I need for 120mm insulation over 18mm ply deck. Thanks
the accent you hear when you are told 2 inches is the standard foundation depth
This is the most ln formative building channel
That’s very kind of you to say Lee thank you. We do try to be informative without telling people how to do things because there is more than one way to do something and our method may not always be the best for the next person. As long as it’s done right it doesn’t matter how you get there.
We always say on the channel ‘it’s not the only way it’s just the way we do it’
Enjoy your weekend Lee 👍🏻
Hi Rich, at 9.18 on the video the 18mm strips Mick was cutting was the idea of them to screw them down through the 12mm OSB, and push that up hard against the insulation. I thought you had to allow for a lath along the front edge of the roof for the water to run into the gutter?
Hi. Did you watch until the end? You’ll have seen the lath go on to form the drip
At 22 mins he talks about putting the lath on and he has.
Yes I did see the lath but couldn't understand why you were using the 18mm strips for
Won’t those round fixings be seen once the rubber is glued down ? I used longer 200mm screws last time I did a warm roof, works ok?
Thanks for the video boys
Saw with a guard rail for he long cuts will be looking more pro :)
lovely skill
I know this is an old video but i have a question. When you put on the fascia, do you follow the angle of the roof or do you attach it straight and then cut off the excess?
Can you share a link for the vapour barrier and the rubber? Thank you
Nice job, I can supply you with a knife and fork for your next project
Sorry guys, you promised to clarify the side cold bridge / uninsulated top of wall situation and you haven't. The rest of the roof build up I can't fault but the missing insulation is a massive no - no and i'd be asking for that roof to be taken up and for the two insulation elements to be linked. And before anyone mentions 'spray foam' as a solution - no it wouldn't be acceptable as a fully filled void cannot be guaranteed! Sorry if it sounds harsh but 45 years of monitoring building & construction does that! ☹
They can still access that area from the inside before boarding the ceiling. I’m sure they’ll fill it with the same 150 fibreglass to the underside of the deck. They seem to know what they’re doing
Hi and yes I probably did but until you edit the footage you have you don’t know what is going or fit in. The person who has commented on this one is correct. We have pushed rock wool into the perimeter from the underneath.
It looks like Alutrix like I fitted to the timber. The roof is mean to be coated with a black glue before putting the sheet down but it’s a nightmare putting it on. Of course when you watch them do it on YT they make it look easy in a workshop demo. The Alutrix is self sealing when you put the mushrooms on as you said.
This manufacturer didn’t specify a primer but you’d have to give it a good yank to get it up once the heat had been on it and yes once the thermal fixings go in it can’t go anywhere can it 👍🏻
@@mrabuilders6723 Didn't want to call you out but from ep 3., the side ceiling joists are approx 20 - 25mm off the side blwk. so pushing 6" quilt through that gap just wouldn't happen! I'll say no more on the situation !
Any idea of material cost for the roof in the video . estimate cost would be helpful
Just a question, why is mick so grumpy all the time does he need a good cuddle lol
Would sips panels be another option for the roof?
Good job :)
How long does this single build taken you guys from start to finishing in weeks ?
Nice... 👍
Scaffold?
Yes please!
alutrix, the best VCL around. not cheap though
It’s like a lot of products that are on the market. We’ve had the chance to use a lot of different ones and sometimes you are just paying for the brand name. We shop around a lot more now and we found the VCL we used and I can’t fault it. 👍🏻
What brand did you use?
Yeah would be nice if you can share the materials you used especially this vcl?
Where is cavity closures how u fix them they ment to tie in how do u get away with this is beyond me u rip customers off not doing job right
That doesn't make any sense but thanks for watching.
no idea why you didnt just build it out of wood and then brick it after. no idea why you guys do most of the things you do compared to what i do here. lol. also....what is a warm roof and what is hardcore? hardcore is what i used to dance to at raves back in the early 90's. i see a lot of over kill in all of these videos but then again i dont know what your codes are. i know our codes are made by the lobbyists for the most part so sometime we get forced to use certain products until that guy is voted out then everyone forgets about it until the next lunatic "code" that some lobbyist paid for that do absolutely nothing. every time i hear you say fixins i keep thinking mashed potatoes, gravy, corn, yorkshire pudding...etc etc..lol
This is definitely not plywood it's OSB