What to look for when building a new flat roof?

What to look for when building a new flat roof?













What to look for when building/refurbishing a flat roof.

Flat roofs are now back in demand and are favoured amongst building owners and architects. With extended life-spans, ease of maintenance, and proven resistance to the climate fluctuations of the British weather! Flat roofs have a high performance and cost effectiveness that when installed and maintained correctly, a flat roof will provide a long service life.

But how do you build a good flat roof?


The roof is the base upon which the entire flat roof relies upon. It must be designed to provide sufficient support for all loads to which it will be exposed, and the method of attachment to it must be appropriate.
Vapour Control layer – Warm roof construction:
Vapour control layers are considered essential under insulation in warm roof construction, more commonly known as a VCL helps to reduce the risk of condensation forming in the flat roof structure.

Insulation – Warm Roof Construction

Insulation is essential on all flat roofs to offices, homes, extensions etc. preventing heat loss through the flat roof. Insulation is rarely used on outbuildings, garages and other buildings which are not heated and will not offer any economic benefits.

U Value:

Building Regulations dictate that certain U Values must be achieved for both new and refurbished flat roofs. The overall roof must meet the requirements of the Building Regulations with regards to the “U” value. Endon Roofing will survey the roof and offer options to provide a flat roof build up to meet with current building regulations.

Flat Roof falls:

A flat roof needs to be able to shed surface water to the gutters. The required falls may be formed by the slope of the joists, tapered firrings installed under a suitable roof deck or a tapered insulation laid to provide falls.

Single Ply Membrane:

The right choice of membrane is critical. Endon Roofing source membranes from accredited, quality manufacturers to provide a high-quality waterproofing solution. Endon Roofing install a high-quality single ply membrane with a life expectancy of at least 30 years.

End use:

This must always be considered, what is the flat roof to be used for? A balcony requiring protective walkway mats, installation of solar panels with specific weld able solar brackets to the single ply membrane. These factors need to be considered when the flat roof is being constructed.


A good quality membrane fitted by a contractor who is trained and approved for that system will help ensure a good flat roof.
No flat roofing system will be the right choice for every situation. For this reason, you should carefully examine all factors about the building, and what’s expected of the roof.

Endon Roofing only employ fully qualified and trained installers for all our flat roof projects.

If you’d like more help and advice on flat roofs, please contact us on 01924 270822 where we will be happy to help.