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If you use a cavity tray do you still need to have a horizontal dpc?
Anonymous user 28/02/2024 - 4.03 PM
In a cavity wall, If you install a cavity tray 150mm above ground level, do you still need to install a horizontal dpc?
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4 Answers
Stewart James Brickwork And Building Services
Rating: 5 out of 5
Yes, you always need to add horizontal damp proof course (DPC)
Answered18 March 2022
9
Brick & Stonework Services
Rating: 5 out of 5
As a cavity tray is plastic it is a DPC in itself, no need for additional DPC if it is on the existing DPC !
Answered18 March 2022
1
Anonymous user
Yes, You would add horizontal DPC underneath cavity tray. This will act as a double barrier against rising Damp.
Answered20 March 2022
1
Dave charrett
Rating: 5 out of 5
Yes, I always add a horizontal damp proof course as well as a cavity tray. Most cavity trays won't cover all of the masonry below a horizontal dpc is a must .
Answered28 March 2022
0