Minimum Roof Pitch Uk Building Regs

Flat roof drainage.

Minimum roof pitch uk building regs.

To enable compliance with the requirements of the building regulations to be demonstrated full details of the new roof will be needed including. Pitch roof this is where tiles or slates are used and a void is usually created underneath. The first decision is whether to insulate a pitched roof at ceiling or rafter level. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units.

The function of a roof is to protect the building below from the weather. Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15. Minimum roof slope roof pitch r905 3 2. In order to satisfactorily fulfil this function over a period of years it must be strong stable and durable.

Deciding on the correct roof pitch for your home very much depends on the style of house you are building or renovating and to a lesser extent your local area. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. Minimum roof pitch for shingles.

In accordance with the guidance in bs 8000 part 6 which in turn direct users to the wind uplift calculations in bs 5534. The justification for roof access informs which aspects of the building regulations apply and which safety measures you should employ. How to insulate a roof. It also requires that roof coverings are fixed correctly.

Choosing the right pitch. The current trend is for a warm roof where insulation is installed between the rafters thereby keeping the roof timbers warm. If it s going to be used infrequently for maintenance only the requirements will differ from a skylight meant to provide regular rooftop access. A correctly build flat roof will drain the rainwater quickly and effectively into the gutters without allowing water to collect in depressions and pond on the surface of the roof leading to the build up of silt deposits on the roof and stresses in the membrane when the water freezes a small amount of ponding is inevitable and it should not reduce the.

In addition roofs must provide good thermal insulation and prevent the spread of fire from adjacent or adjoining properties. The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. This will inevitably result in fixing calculations being required and complied with for all roofing projects covered by building regulations. Flat roof this usually consists of felting which has a slight fall to allow rain water to drain off.