Well done guys. Lots of progress. Mick has the same temperament as myself. Middle age grumpiness 😂😂. 👍👍

Exellent job great description.

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.

Great job and very well explained.

bless you! great work, thanks for sharing

Roof looking 👌

Thanks for the video boys

Went OTT with ours. Marine Ply on top of the insulation - roofers loved it though

kingspan thermataper comes with tissue face to bond edpm directly onto. saves the double boarding and messing with firring strips.

Blinding job as always lads

lovely skill

omg you Brits and your insulation with hidious boxes tacked onto back Malcs in Perth WA ♥️

Good job :)

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. 🤞🤞

Great job guys. Which vapour barrier did you use?

Nice... 👍

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 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.

the accent you hear when you are told 2 inches is the standard foundation depth

It does look like a substation now but I'm sure it will look great when done.

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

Definitely agree there is no plywood in osb

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

How long does this single build taken you guys from start to finishing in weeks ?

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?

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!

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.

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.

Saw with a guard rail for he long cuts will be looking more pro :)

Would sips panels be another option for the roof?

great job gents, could i ask what type of vapor barrier are you using ? thanks

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?

Nice job Hartley lad, how’s Jasper getting on with his house?

Are you not primer before viper barrier roll off?

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

i think there's meant to be 5mm between the osb boards ?

This is the most ln formative building channel

Hi there, what are these thermal fixings called and what size would I need for 120mm insulation over 18mm ply deck. Thanks

Nice job, I can supply you with a knife and fork for your next project

Just a question, why is mick so grumpy all the time does he need a good cuddle lol

Any idea of material cost for the roof in the video . estimate cost would be helpful

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! ☹

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

alutrix, the best VCL around. not cheap though

This is definitely not plywood it's OSB

Scaffold?

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