Do the boards on the upper deck need to line up with and finish to the rafters below? Exact positioning is only approximate so can the boards butt between rafters?
What is the size of that long screw you use at the top of the plywood? What is the spacing between long screws around the perimeter and between inner? Thanks
Hi there, thank you for the very informative video. I am about to place an order on the link below, but I need a bit more info (sorry for my poor knowledge, a beginner DIY...), Our shed's roof is Self Adhesive PU Flet Sheet. A few years, it's not bad but needs some attention, I want to polish it with this Arboflex Pu, followed by UV protection. My question is ) is it ok to use Fibreglass Matting on the PU Flet sheet? and b) Just to reconfirm, is Arboflex Pu, ok to use on the PU Flet Sheet? (I am sorry, as I am still learning so want to make sure before I place an order at the below link)
I actually really enjoyed the video - better than some drab, boring, monotone instructional were usually subjected to. And you're getting it free ya big grump! 😂 I'll say it again, well done lads - excellent video!👍
What is your option on what most roofing manufactures are saying the top osb3/ply should not be used and the roofing product fixed directly onto the insulation. Also the correct flat roof insulation is not foiled back if adhering or torching on the top cover. It must be fleece backed such as the kingspan Thermaroof TR26 or TR27. Full detailed descriptions of the technical reasons I can quote from them. But the short of it is that the top cannot absorb or disperse the heat and is subject to below-ambient low temperatures. So subjects the material to moisture vapour cycles which repeatedly condenses and evaporates on its surface, so in time the top deck will rot and compromise the performance of the system.
No, the first thing to do is treble check that there are no protruding nail heads, splinters or debris after you’ve first rounded off each sharp corner and edge
Why not just torch on two layers again. Far better job no need for pu mastic or any of that prep work. No need for reinforcement matting or any of that shite… torch on still the best flat roof…. Fact
Great video I've bought some 18mm osb3 bourds but the ones I've bought just say kronospan on one side there doesn't seem To be a rough side both sides are smooth Should I sand it or return it for a different type ? Thanks in advance
Good video - but you could have saved the client a bit of money.... osb acts as a vapour barrier, just needed to tape the joints. Also, was the waterproof membrane EPDM? It could have gone over the insulation without yet another layer of osb...
@@johnsonkevin1 Yes it does. I learned this working on Passivhauses and have employed it many times since. If used on the warm side and the joints are taped. Not an airtight layer, but certainly as a vapour barrier. And EPDM can be laid over polyisocyanurate (PIR) insulation, perhaps not the foiled stuff - I don't know about that - but it can be either adhered or mechanically fixed.
Hi, I've recently had my 60m2 flat roof replaced with a rubber roof with one join. The thing is, it doesn't feel like it's stuck down properly. The waters pooling because there isn't enough pitch & the side with the gutters aren't stuck down properly so the water can't run into the gutters. There's also no vapour barrier which makes me think could be a reason why it didn't stick down properly. I was charged 13k just for the roof replaced not including scaffolding
Did you get other quotes? That's incredibly expensive. The good news is it shouldn't matter if it's pooling water won't affect this material. If it looks like it's not been stuck down properly I'd send them pictures and ask for some money back and threaten to take them to court if they refuse as you've not got what you paid for.
If you mean the vapour barrier it’s to stop water vapour entering from the room below and then condensing on the cold side of the insulation i.e the top of the insulation just below the waterproofing layer.
Hi need help. Is OSB wood or structural Plywood better suited for a summer house roof (7m x 4m)? I see everyone is using OSB, but my handy man recommends structural plywood but it is about £150 - £200 more. I'll also be covering the roof with EPDM rubber membrane (classic bond).
Hi need help. Is OSB wood or structural Plywood better suited for a summer house roof? I see everyone is using OSB, but my handy man recommends structural plywood but it is about £150 - £200 more. I'll also be covering the roof with EPDM rubber membrane.
Gunning that chase like a 5 year old what a mess try laying it directly over osb with out old felt under it wont last 5 years you know it i know it .just not roofers end of ...chancers roller and a sweeping brush. talk the talk love to see them on some tricky detail be like a dirty protest they'd be covered in the shite
Hi there, Would you mind me asking you,... I'm doing it on my own and the weather has been the main factor to watch out. I've laid the first sheathing which took me the whole day.... How long did it take you to lay the deck from start to finish? Many thanks!
There is a expensive version of PIR for flat roofs. Does it make any difference? For example: 120mm Recitcel PowerDeck Flat Roof Insulation Board 1200mm x 600mm is double the price per square meter compared to 120mm Recticel Eurothane Insulation Board 2400mm x 1200mm
