Sustainable Building Forum
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What U-value should I target when insulating an existing roof?
For existing domestic roof structures that are being refurbished, you should target a U-value of 0.18 W/m2K as a maximum. You can go lower if you wish but unless you’re insulating your walls as well it is probably not necessary.
To see what we’d suggest, click the relevant link below:-
If these specifications don’t quite fit with your scenario, please feel free to use our Specification Generator to create a specification that fits your situation better.
These specifications will help you build spaces that are both warm in winter, cool in summer and quiet, even in urban locations.
We offer dynamic heat and moisture modelling as well as condensation risk analyses.
Back to Earth is a natural building material supplier. We're not your typical builders' merchant though and instead work closely with our clients during the planning, designing and building phases of projects.