Build a Warm Flat Roof the Right Way

How to avoid common mistakes in flat roof construction, here's a step by step Timelapse guide show you the mistakes that Builders make, why they make them, how you can avoid these mistakes, and make your roof last for as long as you’re going to live in it.
I’ll look at warm roof, cold roof, and that one that’s in between, with the insulation between the joists.

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How to choose PIR insulation : Size & Cut the fast way
   • How to choose PIR insulation : Size &...  
Insulation - Warm roof v cold roof v hybrid - and why should you care
   • Insulation - Warm roof  v cold roof v...  

0:00 Roof deck is in the wrong place
0:50 Cold Roof, Warm roof, “Hybrid” roof
1:31 warm roof for permitted development 2.5m
1:42 vapour barrier for warm roof,
2:44 Finding the dew point
4:17 Why Roof decks fail - positioning of OSB or plywood
5:42 Is OSB waterproof?
5:49 Wet rot within roof make up
6:26 why 2 layers of OSB in warm roof makeup?
7:37 Solvent based versus Water based adhesive for rubber EPDM roof
7:57 Foil faced or tissue faced PIR insulation for warm roof
9:21 Fixing roof insulation into Deck
10:54 Bonding the rubber roof onto the insulation
12:01 Completed roof and Timelapse, roofer’s tips