Breather membranes: time is the ultimate test
Sam Jones2023-02-27T16:13:56+00:00When designing an external wall system, best practice in breather membrane specification is, on the surface, very straightforward: it should be tested to confirm breathability to BS5250 standards, a W1 water tightness rating, 5,000 hours of UV resistance and a Euroclass A fire safety rating in keeping with minimum [...]