- Guide price
- £110–£330
- Repair price
- Confirmed once the leak or damage is found
- Condition survey report
- £140–£290
- Coverage
- England, Wales, Scotland, NI
Cumbria at a glance
- Largest towns
- Carlisle, Barrow-in-Furness, Kendal, Whitehaven
- Postcode areas
- CA, LA
- Building control
- Cumberland Council and Westmorland and Furness Council
- Neighbouring areas
- Lancashire · County Durham · Tyne and Wear · Northumberland
- Guide price region
- North West (−5% on West Midlands rates)
How much does a new roof edge or outlet cost in Cumbria?
Guide prices including VAT at North West 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 Cumbria?
Flat roofs in Cumbria sit on terraced streets with flat-roofed rear kitchens and bathrooms, lock-up garage blocks on estates and bungalows with flat-roofed side extensions and dormers. The North West is one of England's wetter regions, averaging roughly 1,290 mm of rain a year, so falls, outlets and well-detailed upstands matter more than the membrane colour. Approximate 1991–2020 regional averages based on Met Office data.
Building regulations in England
Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. Renovated roofs over heated rooms are insulated to around 0.16 W/m²K where that's feasible, and new extension roofs are built to 0.15 W/m²K. In Cumbria the application goes to Cumberland Council and Westmorland and Furness Council. More on the rules.
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.
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.
Which towns in Cumbria do we cover?
Edge trims, outlets and drainage in Cumbria: questions
Which towns in Cumbria do you cover?
All of Cumbria. 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 Cumbria?
£110–£330 for an outlet or drainage repair, at North West 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 Cumbria?
All of Cumbria, including the CA, LA postcode areas. Send your full postcode and we'll confirm.
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.
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.
Why is my fascia rotting under a flat roof?
Usually because water is getting behind a loose or badly lapped trim, or running back under the edge because there is no proper drip. The fascia and deck edge are replaced and new trims are fitted to stop it happening again.
Everything about edge trims, outlets and drainage → · All flat roofing in Cumbria →