Manufacture Direct Skylight | UKCA & BS Certified Rooflight | Flat Roof Window |. Features: 20 year warranty on the seal, Argon Gas Insulated, G Value: 58%, Glazed, Light transmittance : τv [%] 72, Self-cleaning, Sound reduction (EN 12758): 39dB, U Value: 0.9 W/m²K, UV transmission : τuv [%] 0.
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