Search the Community
Showing results for tags 'coldroof'.
-
Due to circumstances I have ended up with a cold roof for front hallway/porch. During renovation of the old house, I noticed mildew on underneath of the decking due to condensation. There was quite a bit of humidity at the time when the old internal slab of the house was being dug up. Roof didn't have any insulation or VCL at this time so I can see how condensation occured between cold/warm surface of the roof deck. I'm now at the stage to insulate and plasterboard the flat roof and want to minimise any future risk. I will have a 50mm ventilation gap between insulation layer and also a VCL beneath insulation layer as in this pic: However, still a bit concerned about condensation underneath the deck itself, so was either going to stick some VCL/polysheeting directly under deck or use some liquid DPM instead: Painting on the DPM would be a lot easier and a bit safer as over time the spray adhesive with the VCL could fail causing the sheeting to come unstuck and block any airflow. Any cons for me for using a liquid DPM instead? I'd end up with 2 VCLs - good if the main VCL is punctured at some point (electrician / downlights).
- 6 replies
-
- vcl
- condensation
-
(and 1 more)
Tagged with: