Further Detail Hinged opening dome which is operated manually via a worm gear drive, pole available if needed. There are also a range of powered opening options as well. Available in either triple of double skin*, the double skinned domes will provide acceptable insulation where as the triple ones will offer excellent insulation. As well as being practical these domes are easy to install. The kerb foot is tapered avoiding the need for timber fillets while an integral membrane clamp holds the roofing membrane or felt in place. The triple polycarbonate version comprises a unique cassette to minimise the risk of condensation. Mardome Rooflights have a wide range of different options making them extremely versaltile and additional options are available for acoustics, ventilation and light transmission. PLEASE NOTE: These are bespoke items so are non-returnable unless faulty. *Double skin is not suitable for new builds, so in this situation you will need to select the Triple Skin option.