This depends on the site upon which the structure has been built.
Flat roof regulations uk.
The preferred design of a flat roof fall is 1 40 although this can vary and be anywhere down to 1 80.
A lower u value indicates better insulation properties hence u value requirements usually specify a maximum value.
Garage porch flat roofing.
When installing or repairing a flat roof you must adhere to building regulations.
It must provide adequate protection against the elements keeping the buildings structure and interior dry.
If you want to carry out repairs on or re cover less than 25 per cent of the area of a pitch or flat roof you will not normally need to submit a building regulations application.
However if the roof with integral insulation is to be replaced then you may be required to upgrade this thermal element of the structure and reduce the amount of heat that was originally lost by upgrading the insulation.
The performance of the new covering will be significantly different to that of the existing covering in the event of a fire.
Flat roofs were uncommon in the uk until after the second world war.
A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less.
Part h of the building regulations regarding drainage state that water should drain to one or two edges.
A qualified roofing contractor will be able to advise on this but here are some of the main guidelines.
A flat roof must be strong durable and stable throughout its lifetime.
We recommend limited access unless the roof is designed for it.
In bs 6229 a roof is defined as flat if it has an overall pitch of 10 degrees or less.
Always follow a safe system of work using a platform beneath the roof where possible.
Most flat roof systems will meet the regulations but check with your contractor.
Flat roofs some repairs to flats roofs will not require an application for approval under the building regulations.
The two variations of flat roof usually flat roof constructions are defined as either cold or warm depending on how the thermal insulation is positioned in the construction.
If occasional access is required e g.
When choosing a flat roof you need to take a number of considerations into account including the look you want to achieve the size of your flat roof the type of weather it ll face and the amount of labour it will require.
There must be a slope of 1 80.
Falls from flat roof edges can be prevented by simple edge protection arrangements a secure double guardrail and toeboard around the edge.
Consult your local authority if you are planning a new flat roof.
A guide to flat roof options.
U value of a flat roof.
You will need approval however if.
