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Breathable Membrane Required for Loft Conversion?

Postby lsteele » Sun Jul 31, 2016 6:13 pm


I'm in the process of having a loft conversion performed on my small 1st floor flat in a Victorian terrace house in London. To give you an idea of the size of the flat, it's a 2-bed with an area about 55 m^2.

Our builder has recommended that we replace the insulation with a breathable membrane to prevent condensation in the future. We've been quoted £2500 for this including parts + labour. They've said it's not an absolute necessity but they recommend it. My questions are, is this necessary, and does this seem like a reasonable cost?

Thanks very much for any advice!

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Loft Light attic lighting products

Postby welsh brickie » Tue Aug 02, 2016 7:47 pm

It is a good idea, to have air circulation in your roof. I would have it done, See if you can haggle about the cost
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