Both UV stable and heat resistant, the Glidevale Protect VP300 is a medium-weight and vapour permeable underlay that features better vapour resistance than what is required by BS 5250. As well as being stronger than many other underlays in its class, it is suitable for all pit... Read More
Both UV stable and heat resistant, the Glidevale Protect VP300 is a medium-weight and vapour permeable underlay that features better vapour resistance than what is required by BS 5250. As well as being stronger than many other underlays in its class, it is suitable for all pitched roofs, especially those in applications that are fully supported.
The VP300 is both CE marked and BM TRADA certified, and it offers an economical option when a higher specification underlay, for example VP400 PlusLR, is not needed. It is handled easily due to its lightweight structure and can be cut to size when necessary.
In addition to providing a secondary defence against wind-driven rain and snow, the VP300 also prevents wind uplift loads on the roof covering. It can also serve as a temporary roof covering before the slates or tiles are installed.
Please note:
Question:
Hi I Use your felt all the time but recently done a 3 side re roof using it and noticed damp marks all down the sides of the rafters and the roof has tiles on it why is this happening the customer has asked me the question? But I totally agree with him strange never had it before?
Answer:
It could be many reasons, are there any Vent tiles? Is the pitch correct?
Question:
What is the difference between a breathable membrane and a permeable membrane?
Answer:
It means the same thing, being breathable means the membrane is vapour permeable.
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