Protect Zytec is a high performance type LR roof underlay for use in warm and cold roof constructions. Its low vapour resistance helps to avoid the risk of harmful condensation whilst at the same time remaining completely airtight. Protect Zytec is both CE marked and BM TRADA certified. Where the highest performance of Protect VP400 Plus LR is not required but a heavier underlay than Protect VP300 is needed, Protect Zytec meets the requirement by still providing a performance greater than many other underlays in its class. Protect Zytec provides a secondary line of defence against wind driven rain and snow and resistance to wind uplift. Being entirely waterproof yet highly vapour permeable it can be used as a temporary roof covering during the period the roof covering is applied. Please note this product does not require the joints & laps to be taped but must be battened correctly. PropertiesLength: 50m. Width: 1.5m. Roll size: 75m2. Roll weight: 12.3kg. Weight: 158gsm. Brand: Protect. Certification: CE marked. Features Highly vapour permeable, but entirely watertight. Helps to avoid condensation risk in the roofspace. Tough and durable. UV stable and heat resistant. For use in zones 1-4 at 345mm batten gauge in regard to wind uplift. Can be used as temporary roof covering.