Hi,
I am planning to internally insulate one bedroom (as a learning experience). I am thinking of something relatively thin... 3cm, maybe 4cm..
An easy choice would be to buy insulated plasterboards, but they are relatively expensive and I would waste 12.5mm on plasterboard.
Is it a totally crazy idea to install insulation boards directly on walls and then something on top to achieve smooth decorative surface? Something like cork or wall paper?
I would be very grateful for your suggestions.