Rooflight advice

Preparing Your Rooflight Upstand Before Delivery

Preparing the upstand is a coordination task between the builder, roofer and rooflight installer. Agree the selected product and its support detail before the work is covered up.

Korniche roof lantern viewed from inside an extension — Example product configuration. Check your selected product’s dimensions, finish and glazing before ordering.

Allocate responsibility clearly

Identify who forms the structural opening, builds and insulates the kerb, applies the roof covering and installs the rooflight. Agree the point at which the dimensions and completed support will be checked. A supply-only product order does not include those site responsibilities.

Korniche roof lantern frame viewed from outside — Korniche lantern exterior example; details vary by product generation and specification.

Check the detail against the product

Use the selected product’s current drawing for the measurement reference, support dimensions and required fall. Lanterns and flat skylights can have different details. For a replacement, check the existing support rather than assuming it is suitable because a previous rooflight fitted there.

White Ultrasky roof lantern viewed from outside — White Ultrasky frame example. Screen colours are illustrative.

Measure the completed work

Have the installer compare the finished measurements and diagonals with the order specification before fitting. Record the support and membrane junction while they are visible. If the dimensions or construction do not match, stop and resolve the discrepancy; forcing a unit into an unsuitable opening is not a remedy.

Framed Korniche flat skylight on a flat roof — Framed Korniche flat skylight example; this is a separate product from FlatLite.

Plan the installation day

Prepare a safe unloading and lifting route, suitable storage and access to the roof. Keep the current installation manual available and ensure specified materials and equipment are ready. Protect the opening and the room below while work proceeds. Check the delivered parts before booking the final fitting sequence.

Read the preparation checklist

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Compare specifications and configure your rooflight

Korniche roof lantern specifications Configure Korniche roof lantern Korniche flat skylight specifications Configure Korniche flat skylight

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.