Flat roof leak repair
Fault finding and repair for leaking garage, extension, dormer and commercial flat roofs.
Check the covering, edges, outlets and roof deck.
Flat-roof water entry can come from splits, open seams, failed upstands, blocked outlets or movement in the deck below. We inspect the whole water path before recommending a local repair or replacement system.
Built-up felt roofing
Roof outlets, trims and upstands
Domestic and commercial flat roofs
Why flat roofs leak
Standing water, blocked drainage, surface damage, poor edge details and ageing coverings are frequent causes. Water can also enter at a wall junction, rooflight or pipe penetration rather than through the main surface.
Repair or replace the covering
A sound roof with one defined defect may suit a local repair. Widespread cracking, repeated leaks, wet decking or failed detailing can make a full replacement the more reliable option.
Choosing a replacement system
JDL Roofing installs GRP fibreglass and built-up felt systems. The specification depends on the roof size, shape, use, outlets, adjoining walls and condition of the existing deck.
Common questions.
Can a flat roof be repaired without replacing it?+
Often, yes, when the fault is local and the remaining system is sound. We assess the covering and deck before recommending a repair.
Why is water pooling on my flat roof?+
The falls or drainage may be inadequate, an outlet may be blocked or the deck may have moved. Persistent ponding should be investigated.
Which flat-roof system do you install?+
JDL Roofing installs GRP fibreglass and built-up felt roofing for suitable domestic and commercial roofs.
Related roofing information.
Explore connected services and common roof issues before requesting a survey.