Help with damp around patio sliding doors

by **Eddieboy** » Sun Oct 01, 2023 12:12 pm

Damp appearing around this sliding door top corner. New extension built just 3 years ago - cavity wall with render top half and slate cladding bottom half.

Previously been fine and signed off by building control etc.

There is a bath in the room above this area but it’s not been used for many months.

We have no idea as to the cause of this issue. Could it be the roof but can’t see any obvious cracked tiles.

Advice would be v much appreciated as causing a lot of stress.
Thanks in advance

by **stoneyboy** » Mon Oct 02, 2023 9:43 pm

Hi eddieboy,
Given the location of the damp, do you know whether a cavity tray was fitted above the window?
Regards S

by **Eddieboy** » Tue Oct 03, 2023 2:37 pm

Thanks for your reply. Yes a cavity tray is above the door. I’ve had the builder look at it today. He reckons rainwater might be getting in behind the slate cladding and building up. Going to try and silicone along the top of the line of slate and fingers crossed that might help. Any other suggestions? Thanks

by **stoneyboy** » Wed Oct 04, 2023 9:34 pm

Hi eddieboy,
I’m not sure how your builder checked the tray since it is located inside the walls. I cannot see any weep holes above the door - may be worth checking.
Regards S

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Help with damp around patio sliding doors