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Hahahahaha... absolutely brilliant! Woody, you pretty much always provide answer on the issue in your return questions. Thank you for that. I'm self build hence obvious questions. I will ignore side restraints and strap down joists ends with twisted straps. Roof taking shape now. This...

stumbled on this via google.. http://www.buildingregs4plans.co.uk/guidance_flat_roof_structure.php Looks like wall restraints are also required after all.

I was thinking of strapping down roof from flying off in strong wind rather than walls being restraint. Oh hang on, should there be wall restraints too.

Hi all, quick question... warm deck flat roof being installed, approx 6mx6m. Just relaised I've forgot to install roof straps along the side walls (at 1m) where joists run parallel to the side walls. These straps should have attached above 3 x joists and over noggings and the other end built...

Hi all, quick roofing/decking question... 6m flat roof devided in the middle by UC Steel colum, 3m josts either side. 6m wide. UC is 152x152x30 and joists are 47x150mm approx. After joists notched in to steel beam there is few mm gap at the top edge of each joist and steel. Is there an official...

Hi quick question... 100mm block cavity walls near completion to roof height. Cavity is full fill mineral wool Dritherm32. Roof will be Warm deck Flat. Will there be need for ventilation bricks near the top of walls? (I do not have any built in at the moment) I keep seeing condensation from...

I remeber reading somewhere that, although polyisocyanurate PIR insulation look good on specs but performs poorly in low temperatures. If laying 150mm warmdeck roof, is it better to layer it as follows: (1) Layer1 - 50mm PIR (warm side) (2) Layer2 - 50mm XPS/EPS Polystyrene (to prevent...

vinn, thanks for prompt feedback. I think you're right, Im complicating something that should be simple. As its my own job and I have time, I thought I should improve on areas that tend to trouble people long after builders are gone. If the outer skins can be built up to roof level (epdm level)...

Hi all, Nearly ready to install approx 6x6m timber deck roof (warm-deck), divided in the middle by an RSJ to keep joists shorter and costeffective. Deck will be 18mm OSB3 T&G. Firring on top of joists to create fall. I plan to raise the inner skin side walls to...

Bilabong007, chappers and jontop - thanks for all the advice. Chappers - thanks for the tip on piloting holes in OSB.

Hi all, Im nearly ready to lay down 6x6m warm-deck flat roof single story with 150mm insulation sanwiched between 18mm OSB3 T&G sheets. EPDM on top. Having read about wind uplifts and need to secure things down, can I ask for some advice on fastening down 150mm/OSB sandwich please. Is it...