BS5534 Wind zones
With the introduction of BS5534 there has been a change to application of breathable membranes and requires manufacturers to display which zones they are applicable for.
| Geographical Location | Design wind pressure for underlay |
| Well sealed ceiling (Standard appliaction) | Minimum Requirements N/m2 |
| 5 | 1600 |
| 4 | 1330 |
| 3 | 1150 |
| 2 | 975 |
| 1 | 820 |
At all Burton Roofing Merchants depot we have a wide range of membranes to ensure coverage for your required region.
If you are unsure which membrane to use or have any questions about the BS5534 changes don’t hesitate to contact your local depot.
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