Design4 min read

    Rooflights for an extension

    A rooflight can bring daylight deep into an extension and the existing room behind it.

    Rear extensions can make the middle of the house darker if light only comes from the garden facade.

    A well-positioned rooflight solves that problem and can become a defining design feature.

    Position matters

    A rooflight near the old rear wall often brings light back into the original room.

    One large rooflight is not always better than multiple smaller openings.

    Heat and ventilation

    Glass in the roof receives strong sun, so solar control and ventilation are important.

    Opening rooflights can help release warm air in summer.

    Waterproof detailing

    The upstand, roof membrane and drainage around the rooflight must be detailed carefully.

    Good detailing prevents leaks and maintenance problems.

    Summary

    A rooflight works best when daylight, heat control and waterproofing are designed together.

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