Classic Mouldings NI’s dormer window roof units offer a cost and time saving to the builder compared to traditional construction methods. We use durable and low maintenance GRP laminate materials for our prefabricated dormer units and our in-house design department provides working drawings for your approval with each order. The unit has a factory finish with fully bonded treated timber stud framing to walls and ceiling and insulated with polyurethane foam. The dormer window is constructed with GRP side cheeks; either a GRP flat top roof, GRP shallow arched roof, apex GRP reproduction tiled roof, apex trussed ready to tile roof or hipped trussed ready to tile roof, fascia and soffit; and complete with integral side gutter/flashing detail.

We provide full instructions to assist with the installation of the Classic Mouldings NI dormer window unit.

We have several standard sizes offering a great degree of flexibility in terms of; size, and roof pitches. Further bespoke dormer options are available.  Our in-house design and tool making facilities we can produce working solutions to meet your requirements.

We would welcome the opportunity to offer you a quotation.  Please contact 02890 432840 or

Types of Dormers

  • Classic Flat

    Classic Flat

    The Classic Flat will give that finish that can replicate lead, copper or zinc.

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  • Classic Apex

    Classic Apex

    Classic Apex will give your home that added value of a look that can incorporate different finishes from a GRP Tile to smooth.

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  • Classic Curve

    Classic Curve

    The Classic Curve is available in different curve heights and also different colours to help enhance your homes look.

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Classic Moudlings NI
Classic Mouldings NI