Felt On Timber Flat Roof

Sizes of joists needed for flat roof construction.

Felt on timber flat roof.

Osb3 2440mm x 1220mm x 11mm. Email us call us. While laying felt is not an easy job it can be done by anyone who has the patience to deal with it. The underlying deck must be constructed of moisture tolerant materials such as 18mm wbp plywood or suitable chipboard stirling board on treated timber joists.

So any timber joists that are used need to be strong enough to support this weight. It is very seldom used alone. Follow the 10 steps below in order to felt a flat roof. Light weight shed roofing felt is not suitable for flat roof construction.

Felt is usually used on flat roofs under tar or tar and gravel. 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. T g is recommended as a base for cure it grp roofs as well as torch on felt flat roofs. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.

Check to ensure the roof is in good enough condition to walk over. When installing or repairing a flat roof you must adhere to building regulations. Can t find the timber sheets you re looking for. These things will affect the timing cost and overall running of your project.

Here are simple steps to get you started. 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. 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.

Flat roof with no permanent access and altitude not exceeding 100m 0 75 kn m udl 0 9 kn point load most areas exceeding 100m but not exceeding 200m excluding parts of scotland pennines north east england refer to bs 6399 3 1 kn m udl 0 9 kn point load. 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. Step 1 prep work.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. Multiplying these two together will give you the square footage of the roof. You can either measure the roof from the ground or by standing on a ladder and actually going up on the roof. 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.

Old asbestos roofs are often replaced with flat roofs.