- Guide price
- £110–£330
- Repair price
- Confirmed once the leak or damage is found
- Condition survey report
- £140–£290
- Coverage
- England, Wales, Scotland, NI
Glasgow City at a glance
- Largest towns
- Glasgow
- Postcode areas
- G
- Building standards
- Glasgow City Council
- Neighbouring areas
- East Dunbartonshire · East Renfrewshire · Renfrewshire · West Dunbartonshire
- Guide price region
- Scotland (−5% on West Midlands rates)
How much does a new roof edge or outlet cost in Glasgow City?
Guide prices including VAT at Scotland rates. We confirm the price once we've traced the leak or seen the damage.
| Job | Guide price inc VAT |
|---|---|
| Outlet or drainage repair | £110–£330 |
| Localised patch repair | £140–£480 |
| Upstand or flashing repair | £240–£620 |
| Emergency temporary weatherproofing visit | £170–£430 |
| Condition survey and leak investigation | £140–£290 |
Which flat roofs are common in Glasgow City?
Flat roofs in Glasgow City sit on bungalows with flat-roofed side extensions and dormers, 1960s and 1970s link-detached houses with flat-roofed garages and porches and 1930s semis with flat-roofed garages and kitchen extensions. Scotland averages roughly 1,570 mm of rain a year, with the west far wetter than the east, so drainage, falls and wind uplift are part of every specification we write. Approximate 1991–2020 regional averages based on Met Office data.
Building standards in Scotland
In Scotland a building warrant is usually needed for alterations, structural work and new roofs; like-for-like repairs to a covering can be exempt. Section 6 of the technical handbooks sets a domestic roof benchmark of 0.12 W/m²K, applied as far as reasonably practicable on an existing roof. In Glasgow City the application goes to Glasgow City Council (building standards). More on the rules.
Should I fix the edges and drainage or replace the whole roof?
Fix the edges and drainage on their own if the covering is in good condition and the deck is sound. If the covering is near the end of its life or the falls need correcting across the whole roof, it is usually better value to do everything together as part of a replacement.
Trims and outlets are bonded into the waterproofing, so replacing them means cutting into the covering around the edge. On a roof with plenty of life left, that is a worthwhile repair. On an old, brittle covering, the new detail can end up stronger than the roof around it, and correcting falls means taking the covering off anyway. Our repair or replace guide sets out how to decide.
Why does water sit on my flat roof?
Water sits on a flat roof because it can't drain off fast enough: the falls are too shallow, part of the roof slopes the wrong way, the deck has sagged between joists, or an outlet is blocked or set too high.
Current guidance on flat roof design (BS 6229) means most roofs need to achieve a finished fall of at least 1:80, and roofs are commonly designed with a steeper fall, such as 1:60, so that building tolerances and deck deflection still leave enough slope. Many older roofs were built with less, or have settled over time.
A small amount of water that clears within a day or two of rain is often tolerable. Deeper ponding that lingers adds weight, holds dirt and debris, can shorten the life of some coverings and turns any small defect into a leak. A patch won't fix it, because the problem is the shape of the roof. The fix is to correct the falls, either with firring pieces under a new deck or with tapered insulation in a warm roof, or to add or lower outlets so water has somewhere to go. Our ponding water guide explains this in more detail.
Which towns in Glasgow City do we cover?
Edge trims, outlets and drainage in Glasgow City: questions
Which towns in Glasgow City do you cover?
All of Glasgow City. The main towns have their own pages below, and if yours isn't listed we still cover it: send your postcode and we'll confirm.
How much does a new roof edge or outlet cost in Glasgow City?
£110–£330 for an outlet or drainage repair, at Scotland guide rates including VAT. We confirm the price once we've traced the leak or seen the damage.
Which postcode areas do you cover in Glasgow City?
All of Glasgow City, including the G postcode areas. Send your full postcode and we'll confirm.
Can you add a new outlet to an existing flat roof?
Usually, yes. The outlet is cut in at a low point, connected to a downpipe or gutter, and the waterproofing is dressed into it with compatible materials. Whether it solves ponding depends on whether water can actually reach it.
What's the difference between a drip trim and an edge trim?
An edge trim finishes the edge of the roof and holds the waterproofing down. A drip trim has a profile that throws water clear into the gutter. On many roofs a single trim does both jobs.
Is some standing water on a flat roof normal?
A thin film that clears within a day or two of rain is common and usually harmless. Deeper water that lingers for days points to poor falls, a sagging deck or a blocked outlet and should be looked at.
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