ᐅ Compensating for insufficient parapet height using rigid foam insulation boards
Created on: 10 Jul 2017 08:53
J
joegamble
A friendly "hello!" to everyone!
We are currently in the shell construction phase. The building is using a Wienerberger Plan T-10 block. The window openings are mostly finished. According to the plans, the sill height should be 104.5 cm (41 inches) above the top of the foundation slab. The masonry has been built up to about 101 cm (40 inches), which corresponds to four courses of the Plan T-10 block. So, about 3 cm (1 inch) are still missing to reach the desired sill height. Our site manager suggested compensating for the missing height with a 20 mm (0.8 inch) Styrodur board.
My question is whether this is technically sound and if the Styrodur board might compress once the windowsill is installed and subjected to load (for example, if someone leans on it). If the board compresses, I am concerned that the windowsill could crack or break.
Am I just overthinking this, or is my concern justified?
Good luck
We are currently in the shell construction phase. The building is using a Wienerberger Plan T-10 block. The window openings are mostly finished. According to the plans, the sill height should be 104.5 cm (41 inches) above the top of the foundation slab. The masonry has been built up to about 101 cm (40 inches), which corresponds to four courses of the Plan T-10 block. So, about 3 cm (1 inch) are still missing to reach the desired sill height. Our site manager suggested compensating for the missing height with a 20 mm (0.8 inch) Styrodur board.
My question is whether this is technically sound and if the Styrodur board might compress once the windowsill is installed and subjected to load (for example, if someone leans on it). If the board compresses, I am concerned that the windowsill could crack or break.
Am I just overthinking this, or is my concern justified?
Good luck
J
joegamble11 Jul 2017 15:01I have to agree with you to some extent that discussions and arrangements could have been avoided if more information had been provided in advance.