I am going to start internally insulating my external walls over the break. I am using 50mm celotex board over-clad with 12.5mm plasterboard. The ceilings are 2800-3000 so there will eb joints even if the boards are installed vertically.
Given that the boards are the same size i was planning on installing one horizontally and the other vertically so that there is never a joint straight through both boards. This could of course be achieved by staggering vertical joints but i thought it would be easier running at 90 degrees to each other.
3 Questions before i begin;
1) Is 1 skin vertical and the 2nd horizontal common practice and ok to do (i have seen it regularly done on site but with both skins being plasterbaord?
2) Is there a preference of the celotex or plasterboard layer to be laid horizontally/vertically
3) Due to ceiling heights there will always be a 200-300 section on top of a full board. Should this strip be always placed at the top/bottom or should these also be staggered.
Given that the boards are the same size i was planning on installing one horizontally and the other vertically so that there is never a joint straight through both boards. This could of course be achieved by staggering vertical joints but i thought it would be easier running at 90 degrees to each other.
3 Questions before i begin;
1) Is 1 skin vertical and the 2nd horizontal common practice and ok to do (i have seen it regularly done on site but with both skins being plasterbaord?
2) Is there a preference of the celotex or plasterboard layer to be laid horizontally/vertically
3) Due to ceiling heights there will always be a 200-300 section on top of a full board. Should this strip be always placed at the top/bottom or should these also be staggered.