ᐅ Insulate the ceiling using drywall / composite drywall?

Created on: 1 Nov 2018 22:02
M
manoloxxl
M
manoloxxl
1 Nov 2018 22:02
Hello everyone,

I want to improve the insulation in my condominium towards the roof.

My ceiling consists of a simple drywall board, followed by a wooden stud frame, a membrane, and above that insulation wool of unknown thickness. On top is a standing seam copper roof.

I often feel that a lot of heating energy is being lost here. Now I would like to screw another drywall board onto the existing one as part of a renovation. Either 12.5mm (1/2 inch) drywall or composite drywall. With this, I want to improve the insulation upwards.

Converting the attic, meaning adding more insulation from above, is not an option. It’s simply not accessible.

What benefits can this measure bring? Is the cost reasonably justified by the potential gain?

Regards

Manuel
E
Elina
2 Nov 2018 22:03
Enter the values into the U-value calculator. Gypsum board is not an insulating material. In composite panels, only the polystyrene part provides insulation, and what difference do 1-2 cm (0.4-0.8 inches) really make?

A more sensible but also more expensive option would be vacuum insulation panels; however, no nails are allowed in the ceiling afterward. They insulate very effectively and are lightweight, so 20 mm (0.8 inches) is sufficient (again, enter these values into the U-value calculator).