Breathable Membrane for Garden Shed Insulation - Shiplap on a Wood Frame Information, help, tips and advice on cavity walls, ceilings and lofts etc....

[afernandeza]

I have started to insulate my garden shed using glass mineral wool. The walls of the shed are just shiplap wood cladding on a wood frame. I intended to just fit the wool directly on the wood cladding inside, and then cover everything with MDF boards. However, someone recommended me to tack a breathable membrane to the walls before fitting the wool. Does this make sense? What difference will this make?

[Colin Evans]

Yes. The membrane will allow moisture in the form of water vapour to escape from inside the building, avoiding a buildup of condensation. Kingspan explain it well on their website, google Kingspan breathable membrane for a full explanation.