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Repairs and surveys

Edge trims, outlets and drainage across Leicestershire

Across Leicestershire, ponding on flat roofs is usually caused by shallow falls, a sagging deck or outlets that are blocked or set too high. A patch won't fix that. We explain whether new outlets will help or whether the falls need correcting with firring or tapered insulation as part of a replacement.

Aluminium drip trim discharging into a new black gutter beside a roof outlet on a rubber flat roofComputer-generated example image
Guide price
£120–£340
Repair price
Confirmed once the leak or damage is found
Condition survey report
£150–£290
Coverage
England, Wales, Scotland, NI

Leicestershire at a glance

Largest towns
Leicester, Loughborough, Hinckley, Coalville
Postcode areas
LE
Building control
Leicester City Council, Charnwood Borough Council, Hinckley and Bosworth Borough Council and 5 other councils
Neighbouring areas
Warwickshire · Northamptonshire · Nottinghamshire · West Midlands
Guide price region
East Midlands (−2% on West Midlands rates)

How much does a new roof edge or outlet cost in Leicestershire?

Guide prices including VAT at East Midlands rates. We confirm the price once we've traced the leak or seen the damage.

JobGuide price inc VAT
Outlet or drainage repair£120–£340
Localised patch repair£150–£490
Upstand or flashing repair£250–£640
Emergency temporary weatherproofing visit£180–£440
Condition survey and leak investigation£150–£290

Which flat roofs are common in Leicestershire?

Flat roofs in Leicestershire sit on low-rise post-war blocks of flats, newer estates where the first extension roofs are now being replaced and shops with flat-roofed rear stores below flats. The East Midlands is drier than the west of Britain, so most flat roofs here fail through age, UV and poor detailing at upstands rather than sheer rainfall. 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 Leicestershire the application goes to Leicester City Council, Charnwood Borough Council, Hinckley and Bosworth Borough Council and 5 other councils. More on the rules.

How long do flat roof trims and outlets last?

Properly fixed GRP or aluminium trims and well-installed outlets should last about as long as the waterproofing they are part of. What shortens their life is poor fixing, movement in a rotten deck edge and blockages that are never cleared.

A quick check of outlets and gutters each autumn, and again after storms, prevents most drainage problems. Look for leaves and silt in outlets, gutters pulling away from the fascia, trims that have lifted or split at joints and staining on the wall below the edge. The maintenance guide lists what to check and when. Only check what you can see safely from the ground, a window or a ladder at the edge, and never walk on a roof that isn't designed for it.

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 Leicestershire do we cover?

Edge trims, outlets and drainage in Leicestershire: questions

Which towns in Leicestershire do you cover?

All of Leicestershire. 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 Leicestershire?

£120–£340 for an outlet or drainage repair, at East Midlands guide rates including VAT. We confirm the price once we've traced the leak or seen the damage.

Which council handles building control for a flat roof in Leicestershire?

It depends on where the roof is: in Leicestershire that's Leicester City Council, Charnwood Borough Council, Hinckley and Bosworth Borough Council and 5 other councils. 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. We confirm which applies at the survey.

How often should flat roof outlets be cleared?

At least once a year, ideally in autumn after the leaves fall, and more often for roofs under trees. A quick check after heavy storms is also worthwhile.

Do new trims need building regulations approval?

Not usually on their own. Approval only becomes a question if the work is part of a larger re-roofing job or alters the structure.

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.

Everything about edge trims, outlets and drainage → · All flat roofing in Leicestershire →

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