Minimum Roof Pitch Uk Building Regs

Pitch roof this is where tiles or slates are used and a void is usually created underneath.

Minimum roof pitch uk building regs.

Does anyone know what is the minimum pitch allowed for a sloping roof to my extension. According to bs 6229 bs 8217 flat roofs should be designed with minimum falls of 1 40 to ensure a finished fall of 1 80 can be achieved allowing for any inaccuracies in the construction. Sometimes the excitement of starting a new construction project or building venture can lead you to forget about the finer details such as planning permission and local building regulations. There s no minimum pitch the only requirement is that the roof covering is appropriate.

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. To enable compliance with the requirements of the building regulations to be demonstrated full details of the new roof will be needed including materials and their dimensions and performance. This will inevitably result in fixing calculations being required and complied with for all roofing projects covered by building regulations. 10 degrees with a flat roof covering edpm grp etc would be fine.

It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. Also i am woried about rain going under the tiles. In accordance with the guidance in bs 8000 part 6 which in turn direct users to the wind uplift calculations in bs 5534. I ve calculated the propsed roof angle at 19 20 degrees.

It is a requirement of building regulation part h that adequate provision is made for rainwater to be carried from the roof of the building. Make sure your comply with flat roof building regulations. It also requires that roof coverings are fixed correctly. Our 5 web apps provide precompiled building regs specifications that can be compiled into a custom specification for your building projects.

The function of a roof is to protect the building below from the weather. Flat roof this usually consists of felting which has a slight fall to allow rain water to drain off. Modern tiles permit shallow pitch but some of the older traditional coverings. 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.

Choosing the right pitch. If you have a covering in mind look at the manufacturer s instructions. 35 is considered to be the minimum for slate and clay but if you do need to go below this interlocking concrete tiles are the best option. Slate is often 25 degrees some 20 and some as low as 15.

I am not sure if building control will allow this.