How to insulate a flat roof

white modern self build with flat roof and garden
(Image credit: c/o Baufritz)

Understanding how to insulate a flat roof is crucial for renovators working with old properties, where insulating a roof properly is likely to be top of their to-do list.

Flat roofs are a major weak point in the thermal defences of our homes because so many were originally built with little or no insulation. 

Ian Rock
Ian Rock

Ian Rock is a chartered surveyor and author of eight popular Haynes Home Manuals.

Ian Rock

Chartered surveyor Ian Rock MRICS is a director is and the author of eight popular Haynes House Manuals, including the Home Extension Manual, the Self Build Manual and Period Property Manual.

Ian is also the founder of Zennor Consultants. In addition to providing house surveys, Zennor Consultants provide professional guidance on property refurbishment and maintenance as well as advising on the design and construction of home extensions and loft conversions, including planning and Building Regulations compliance.

Ian has recently added a 100m2 extension to his home; he designed and project managed the build and completed much of the interior fit-out on a DIY basis.