Roof Lanterns for North-Facing Extensions: A Daylight Checklist
Plan roof glazing for a north-facing extension, balancing rooflight position, nearby obstructions, daylight and the room behind it.
Map where daylight is needed
Identify the parts of the proposed room that need useful daytime light: a worktop, dining table, reading seat or the connection to the original house. North-facing does not mean every project has the same conditions. Nearby buildings, trees and the depth of the extension can matter as much as its compass direction.
Compare rooflight position with room depth
Consider how the opening relates to the darker areas of the plan. A roof lantern over the far end of an extension may make that area bright while leaving the adjoining room dependent on borrowed light. Ask the project designer to review placement alongside the wall glazing and ceiling layout. A rooflight is part of the overall daylight plan.
Check the glass information
Review light transmission for the selected glazing build-up, alongside thermal and solar-control figures. Do not assume a colour name tells you how much light reaches the room. Photographs illustrate possible layouts but cannot predict the appearance or daylight level of your own space. Where daylight is a major concern, discuss a project-specific assessment before committing to the opening.
Make a practical product shortlist
Compare the Ultrasky and Korniche roof-lantern pages, then check the available sizes and finishes in their individual designers. Confirm the support details with the installer before ordering. Keep the selected product and glazing specification with the building drawings, and allow for safe cleaning access. Roof glazing can introduce light from above, but a particular result should not be promised from a photograph alone.
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.
