Heavy sliding patio doors over cavity wall opening

[sg1999]

Hello everyone,

I read on the sliding patio doors brochure that they are very heavy and require a solid base. Their base frame will sit over a cavity void. I am thinking to close the cavity with a steel plate, they are "standard" 8mm thick, runs all the length along the bottom of the door.

Is that a good idea?

 

[Swwils]

Lots of products exist.

marmox blocks, cavalok, etc.

It's not a new problem, also despite being heavy the load can be spread over considerable cm2.

 

[sg1999]

It's more about the load, half of the frame potentially dangling over the cavity, rather than insulation issues. But yes I will stick some celotex in that (very deep) gap first.