18mm Gap

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VELUX’s twin slate 18mm gap flashing has been rigorously tested to ensure it meets all modern needs.

From windows of 55cm by 78cm to 134cm by 140cm, you’ll find all the 18mm gap flashing products you need below.

Looking for something specific? If you can’t find it here, give our friendly customer services team a call on 01752 692760 and they’ll be glad to help you.

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Products in 18mm Gap:
Showing 1-15 of 15 products