Felt On Timber Flat Roof

Felt is also used under shingles as a sub layer in most cases as additional protection and to protect against nail heads on the wood covering or other underlying shingles if re roofing over existing roof.

Felt on timber flat roof.

Email us call us. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. So whether your new flat roof is to be made of timber concrete or felt or a combination of these materials you need to comply with flat roof building regulations. Old asbestos roofs are often replaced with flat roofs.

Multiplying these two together will give you the square footage of the roof. Here are simple steps to get you started. You can either measure the roof from the ground or by standing on a ladder and actually going up on the roof. Light weight shed roofing felt is not suitable for flat roof construction.

These things will affect the timing cost and overall running of your project. Follow the 10 steps below in order to felt a flat roof. Bituminous felt is a form of waterproof sheeting that is used to cover flat roofs or as an underlay beneath slate or tile roofing. Osb3 2440mm x 1220mm x 11mm.

For additional stability you can also use steel joists that are built into one or both of the walls. You will then need to measure the length and width of the roof. View as grid list. Can t find the timber sheets you re looking for.

While laying felt is not an easy job it can be done by anyone who has the patience to deal with it. The substance itself is made from bitumen which comes from the distillation of crude oil that has been either mixed with sand or crushed limestone. It is very seldom used alone. Sizes of joists needed for flat roof construction.

When installing or repairing a flat roof you must adhere to building regulations. Felt is laid on a flat roof to help keep the roofing system waterproof. The underlying deck must be constructed of moisture tolerant materials such as 18mm wbp plywood or suitable chipboard stirling board on treated timber joists. T g is recommended as a base for cure it grp roofs as well as torch on felt flat roofs.

Felt is usually used on flat roofs under tar or tar and gravel. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. Make sure the roof is clean dry and that all nail heads are flush with the deck. Step 1 prep work.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc.