Thanks. I was going to use flooring insulation, and board the internal side of the EXTERNAL only walls with cellotex pl4000. The internal walls being boarded out as appropriate.
Re the installation, I'm going to follow the instructions within the cellotex applications sheet, specifically:
Ensure a continuous seal at skirting, ceiling level and at openings by applying a continuous
band of gypsum adhesive. Gypsum adhesive at perimeter edges can be replaced with thin
• Apply further dabs of gypsum adhesive. This should be in accordance with the adhesive
• Align sheets against the dabs and secure into correct position.
....i'm going for dot and dab
• Once the dabs are set, it is recommended that additional secondary fixings be applied to the
Celotex PL4000. Exact
ixing details should be in accordance with the recommendations of the fixing manufacturer.
....errr... what kind of fixings? are they saying that after dotting and dabbing I should subsequently add screws or similar?
• Joints between the boards must be tightly butted, taped and jointed using appropriate tape
a nd jointing material to
create the vapour control layer (VCL).
OK, understood ..... I guess I need to impress this onto the installers helping me.
• Line window and door reveals with thinner Celotex TB4000 boards to reduce the risk of
....lined how exactly? New upvc windows are going in and will be sealed (foam recommended on this thread) and the area around it made good.
anyone got a simple explanation of "thermal bridging" I''m suspecting its nothing more than a "cold spot" in a house where there is insufficient or wrongly installed insulation. like where windows join the walls. I'm not sure how I can add extra insulation there without taking yet more space from the room? I take it TB4000 is better than PL4000?
here's a sketch of the system.... side on..... maybe I should put some mebrane between the brick walls and the chipboard.
Edited by jono2000, 31 March 2013 - 11:22 AM.