Xlok Ultra panels are delivered to site with a protective film covering the glazing, which must be removed after installation. Panels should be treated with care. Unloading and manoeuvring is usually easiest by hand. Panels must never be exposed to weather before installation and should be stored in clean, dry conditions, protected against direct sunlight and in an upright position.

Polycarbonate rooflights should only be cleaned with copious amounts of warm soapy water solution and a soft cloth. Never use solvents or alkaline cleaners or thinners. Do not scrub with brushes or sharp instruments, as these will mark the surface. If a rooflight is found to be damaged it must be replaced.