Construction Warm Flat Roof Fascia Detail

Whether the joists are angled or you use firrings.

Construction warm flat roof fascia detail.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. Using timber wall plates. A flat roof must be strong durable and stable throughout its lifetime. This article covers all manner of flat roofing venting methods and details on how to build a flat garage roof and how to frame a flat roof and also encompasses flat roofs roof decking roof coverings including flat roof felt how to prevent leaks at abutments timber flat roof construction details and parapets and common.

Flat roof construction for residential. The other is putting osb and insulation on even a slightly sloping roof means everything from the top of the joist up will not be plumb but run at an angle. No flat roof is truly flat. Flat roof types.

Say 150 joists and 152 beam which gives a fascia about 450 deep rather ungainly. Hopefully this video will help explain the difference between warm flat roof construction and cold flat roof construction. Doing it the builder s way you are looking at 125 kingspan. As with the construction of any type of roofing system it s crucial to understand the correct process and essential criteria involved in flat roofing construction.

By way of metal flat roof joist hangers. Those details show the chief drawback of the warm roof the deep fascia. Your flat roof construction detail drawing has one obvious mistake. 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 pieces of rigid insulation between joists and use expanding foam to seal the insulation to the joists roof board and wall including the ceiling plasterboard to the.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. 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. Your sketches seem to show the insulation proportionately thinner than it needs to be. For additional stability you can also use steel joists that are built into one or both of the walls.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. No one online shows you this which is. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less.