If the span of the roof is about 13 16 feet the beams length varies from 5 to 7 inches.
How to build flat roof house.
From there the flat roof system you choose will determine the materials you apply.
The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.
Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.
On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases.
This is where the roof insulation sits directly on top of the timber structure thus keeping it warm and then the roofing membrane is laid over the insulation a cold roof places the insulation between the rafters underneath the ply roof covering.
Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape.
The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure.
Concrete is usually mixed of gravel and cement.
For additional stability you can also use steel joists that are built into one or both of the walls.
Of course you don t need to live in a modern house to deal with a flat roof.
The cheapest and simplest solution is to construct a warm roof.
This will give additional stability to the roof structure.
These components are taken in such a proportion.