The wall of my room is covered with a thermal insulation under CLIMAPOR wallpaper in expanded polystyrene 4 mm thick and covered with a wallpaper from above. The wallpaper has some blackish spots at the bottom near the skirting boards. I want to replace the vinyl wallpaper. How to remove the paper alone or remove paper and insulation glued to the wall?
If there are black spots near skirting boards it is because you have a moisture problem that you will have to determine the origin before considering installing a new coating. This phenomenon can come from capillary rise in the ground, accentuated by the laying of a layer of insulation which prevents the walls to breathe properly and to evacuate in a natural way the humidity. I am therefore of the opinion of removing all to make a more conventional insulation (rockwool + plasterboard) which will be much more effective in terms of thermal and acoustic insulation. You can then glue the coating of your choice. But first of all, determine the cause of this humidity (make sure that the ventilation is satisfactory)!
Consult our sheet "INTERIOR INSULATION OF WALLS BY THERMO-ACOUSTIC DOUBLING" which is on the site.
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