16/10/2026
How should flat tops and parapet walls be waterproofed? 💧
Flat tops and parapet walls are high-risk areas because water can sit on these surfaces and move into the wall if they are not properly protected.
When using Dulux Rainshield, the system should be applied over the full length of the wall top. It should not stop on the flat surface only — it should be taken up, over and down the parapet, extending at least 25mm down the sides.
This helps protect vulnerable edges and wall tops where water ingress can often begin.
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