Flat Roofing Warm Flat Roof Fascia Detail

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Flat roofing warm flat roof fascia detail.

This approach uses insulation with no air gap either immediately above or below the roof deck. Construction studies drawing detail showing how to draw a flat roof warm deck construction detail to a scale of 1 10 with a short introduction highlighting t. The major difference between the warm flat roof and the cold flat roof has to do with the air flow between the roofing timbers known as joists that help to hold up the roof. For cold flat roofs the vapour layer needs to be positioned underneath the insulation layer on top of the room below to create an effective barrier.

So if i make the new roof a warm roof insulation behind the fascia is straightforward if fiddly i just need to persuade the roofer to close and insulate the gaps between joists by taking off the old fascia and inserting. Steve from london flat roofing explains how warm flat roof construction works in this excellent short video. Good question theoretically when building a warm roof the vaper control layer goes on the warm side of the insulation. Find warm flat roof cold flat roof insulation solutions at iko polymeric.

Whether the joists are angled or you use firrings. A vapour control layer must be used below the insulation. For guidance on roof insulation please contact us on 44 01257 488 000. If you put insulation under the decking and between the joists you lower the temperature of the decking and lower the due point thus bringing it closer to the danger point of being in the building.

In the warm flat roof construction there is insulation packed into every possible space where air can flow. No flat roof is truly flat. This option avoids the requirement to ventilate the roof. Your flat roof construction detail drawing has one obvious mistake.

I explain problems with insulating a roof using the warm and cold roof construction methods. A 50mm air gap must be left. On a warm flat roof the layer is installed underneath the insulation to stop moisture interacting with it through rising thermal pressure lower down in the building.