Condensation on a Rooflight: What to Record Before Asking for Help
Record where and when rooflight condensation appears, distinguish surface moisture from misting between panes, and prepare a useful enquiry.
Where is the moisture?
Room-side glass
Record moisture on the face looking into the room. Note heating, ventilation, cooking and drying clothes at the time. Photograph it from a safe position so your installer can distinguish it from moisture elsewhere.
Outside glass
Record the time, weather and whether the moisture clears later. An outside-surface observation is different from misting between panes. Do not climb onto the rooflight to check it.
Between the panes or around the roof junction
If moisture appears between the glass panes, or water is entering at the surrounding roof, give the supplier or installer photographs and the order details. These need separate investigation. Do not order replacement glass or apply sealant until the source has been established.
First identify the location
Note whether moisture appears on the room-side surface, the outside surface or apparently between the panes. These observations help an installer investigate; they are not interchangeable descriptions. Take photographs from a safe position and record whether the appearance changes during the day. Do not climb onto the rooflight to inspect it.
Record the conditions
Write down when the moisture appears and whether cooking, drying clothes or other moisture-producing activities have taken place nearby. Note any recent change in ventilation or heating. For an existing installation, say whether the issue is new or has occurred since fitting. These details give the installer more context than a photograph without a date or description.
Avoid diagnosing from one symptom
Surface condensation, misting within a sealed unit and water entering around a roof junction need different investigations. Do not assume that ordering new glass will fix moisture without establishing its source. An installer may need to check the rooflight, perimeter junction, roof covering and room conditions. Avoid dismantling or applying sealant before the cause has been assessed.
Prepare the product information
Keep the order number, full rooflight name, glass specification and installation date with your enquiry. The Stratus and Korniche specification pages help identify the correct product documents, but they do not replace an inspection. Contact the supplier or installer with the observations you have collected. If replacement is recommended, confirm the exact part and dimensions before placing an order through a designer.
Compare specifications and configure your rooflight
Have your installer confirm the selected product's ordering dimensions and support details before placing an order. Read the measuring guide and keep the final specification with your project drawings.
