Roof window and dormer leaks
Leaks around a roof window or dormer: the junctions are the first to go.
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Around roof windows and dormers, many materials meet: flashing kits, underlay connections, sealant and lead. It is precisely these junctions that leak first — often only visible during rain with wind from one particular direction.
Repairs cost € 125 to € 400: from renewing sealant joints and underlay connections to redressing the lead around the dormer. On an ageing roof window, the flashing kit may need replacing.
Note: condensation is regularly mistaken for a leak. Drips under a roof window in cold, dry weather often point to condensation or a ventilation problem — a professional spots the difference quickly.
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