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 pitch uk building regs.
Also i am woried about rain going under the tiles.
I am not sure if building control will allow this.
This will inevitably result in fixing calculations being required and complied with for all roofing projects covered by building regulations.
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.
All tiles have a minimum roof pitch which is always stated in the manufacturers technical information.
Our 5 web apps provide precompiled building regs specifications that can be compiled into a custom specification for your building projects.
Pitch roof this is where tiles or slates are used and a void is usually created underneath.
Choosing the right pitch.
Does anyone know what is the minimum pitch allowed for a sloping roof to my extension.
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.
Make sure your comply with flat roof building regulations.
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.
Modern tiles permit shallow pitch but some of the older traditional coverings.
These things will affect the timing cost and overall running of your project.
It also requires that roof coverings are fixed correctly.
Flat roof this usually consists of felting which has a slight fall to allow rain water to drain off.
The function of a roof is to protect the building below from the weather.
I ve calculated the propsed roof angle at 19 20 degrees.
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.
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 performance of the roof covering.
The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m.
In accordance with the guidance in bs 8000 part 6 which in turn direct users to the wind uplift calculations in bs 5534.
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.
Any advice would be appreciated.
