Glass Roof Repair
Misted glass usually means a failed sealed unit, and a leaking lantern is almost always the upstand flashing, not the glass itself.
Two problems account for most glass roof repairs: seal failure in a double or triple-glazed unit causing condensation to build up between the panes (which needs the unit replacing, not just cleaning), and flashing or upstand leaks at the roof junction, which is a roofing fix rather than a glazing one.
Sherford Roofing repairs glass roofs, lanterns and rooflights across Plymouth and Devon, correctly diagnosing whether the fault is in the glazed unit itself or the surrounding roof detailing before recommending a fix.
Our Process
Diagnose the Fault
We check whether the issue is the glazed unit itself, the upstand flashing, or frame drainage, each needs a different fix.
Unit or Flashing Repair
A failed sealed unit is replaced; a flashing leak is repaired at the roof junction rather than at the glass.
Clear Drainage
Frame drainage channels are cleared where blockage is causing water pooling or ingress at the sill.
Confirm Watertight
The repair is checked to confirm the roof is fully weathertight again.
Glass Roof Repair FAQs
This means the sealed unit's gas fill has failed and the seal has broken, letting moisture in between the panes. It's a unit replacement, not something that can be cleaned or fixed.
More often the roof, flashing or upstand leaks at the junction between the lantern or rooflight and the surrounding roof covering are a more common cause of leaks than the glazed unit itself.
Yes, in most cases an individual failed unit can be replaced within the existing frame, without needing to replace the whole structure.
Need Glass Roof Repair?
Free estimates across Plymouth and Devon. Bauder certified, Checkatrade vetted, honest advice every time.
Or call our office: 01752 741888