Hi all,
Looking for a bit of advice on cavity trays above a roof abutment. I've had an extension built and the builders skipped the cavity tray. They've gone bust so I'm left to try and find a solution.
The building inspector has picked up on it, and said it really needs to be there. The plans say cavity tray or Vandex BB75 to waterproof, which is a cement slurry, and it seemed like he would accept that as a less optimal solution, but I'd probably have to hack all the render off to apply it.
The wall is rendered finish and there are 3 windows and an internal corner above the abutment, presumably the cavity tray wouldn't need to extend under the windows, so it feels like a lot of stop/starting bits of cavity tray to insert, with the sloping/corner abutment being the most difficult.
If I go down the cavity tray route, what would be the best way to cut the block out? I don't think there is enough clearance to get a stihl saw in due to the low pitched roof.
Part of me thinks the waterproofing option is better because it's not disturbing the integrity of the walls.
Thanks,
Henry
Looking for a bit of advice on cavity trays above a roof abutment. I've had an extension built and the builders skipped the cavity tray. They've gone bust so I'm left to try and find a solution.
The building inspector has picked up on it, and said it really needs to be there. The plans say cavity tray or Vandex BB75 to waterproof, which is a cement slurry, and it seemed like he would accept that as a less optimal solution, but I'd probably have to hack all the render off to apply it.
The wall is rendered finish and there are 3 windows and an internal corner above the abutment, presumably the cavity tray wouldn't need to extend under the windows, so it feels like a lot of stop/starting bits of cavity tray to insert, with the sloping/corner abutment being the most difficult.
If I go down the cavity tray route, what would be the best way to cut the block out? I don't think there is enough clearance to get a stihl saw in due to the low pitched roof.
Part of me thinks the waterproofing option is better because it's not disturbing the integrity of the walls.
Thanks,
Henry