Timber flat roofs timber flat roof construction usually consists of structural joists topped with a decking of plywood or a similar sheet material.
Timber flat roof construction details uk.
Roofs tend to be either pitched or flat and typically in residential construction timber is the most common material used.
Part 4 flat roof construction.
Covers flat roof materials and flat.
The definition of a flat roof according to bs 6229 is having a pitch less than 10 o to the horizontal however some in the industry would consider up to 15 o as their definition of a flat roof.
But this type of roof is seldom as attractive as the pitched form as it can result in a blocky stunted appearance.
The supporting structure and the covering.
For additional stability you can also use steel joists that are built into one or both of the walls.
The building regulations in the uk provide guidance on roof design.
When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off.
Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings.
Others would treat even steeper pitches as flat roofs.
Part 3 pitched roof detail.
A flat roof must be strong durable and stable throughout its lifetime.
The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.
There are two basic components of a timber roof.
Flat roofing under construction plywood decking is then used to cover the joists with the width in between also determined by the weight being placed upon them.
Covers pitched roof materials basic pitched roof designs cold and warm pitched roofs and pitched roof construction.
Getting the balance right here is crucial as too much weight will inevitably lead to an unstable roofing structure.
This will give additional stability to the roof structure.
It must provide adequate protection against the elements keeping the buildings structure and interior dry.
A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less.
The roof is a key element of the building structure providing protection from the elements and has a vital role in reducing heat loss from the building.
The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure.
Covers pitched roof detail.
Part 2 pitched roof construction.
Wherever possible joists should span the shortest distance of the roof plan.
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.
