Leigh at a glance
- Postcode districts
- WN7
- Population
- about 43,626 (GeoNames)
- Council area
- Wigan Council
- Building approval
- Wigan Council building control, or a registered building control approver
- Nearest main town
- Wigan, about 6 miles
- Guide price region
- North West (−5% on West Midlands rates)
What does a balcony or terrace in Leigh need?
Door thresholds are a common reason for balcony work in Leigh. Where a door was fitted with a low step-out and no drainage channel, water driven against the frame finds its way under the sill. Re-waterproofing gives the chance to rebuild that detail properly.
Around Leigh, flat roofs are common on low-rise post-war blocks of flats and on 1930s semis with flat-roofed garages and kitchen extensions. 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.
How much does balcony or terrace waterproofing cost in Leigh?
At North West guide rates, a 12 m² balcony in a liquid-applied system including scaffold comes to £1,800–£3,100 including VAT. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Balcony (12 m²), liquid-applied, scaffold | £1,800–£3,100 |
| Single garage (18 m²), EPDM rubber | £1,500–£2,650 |
| Extension (20 m²), GRP, new deck + insulation | £2,850–£5,100 |
Which waterproofing system is best for a balcony?
For most small balconies, a liquid-applied membrane is the practical choice, because it is brushed or rolled on and forms one continuous layer around posts, door frames and outlets with no seams to fail. Many systems include a hard-wearing, anti-slip topcoat.
GRP fibreglass gives a rigid, walkable surface and suits balconies left exposed rather than paved. On larger roof terraces under paving or decking, single-ply membranes are common, and mastic asphalt has a long record on concrete terraces and blocks of flats.
The choice also depends on what goes on top. Paving on pedestals protects the membrane, while an exposed balcony needs a system rated for foot traffic in its own right. We specify the build-up at survey.
What's included?
- Strip-out of the failed membrane and deck repairs
- Written workmanship guarantee, with approvals handled where needed
- Sealed details at doors, outlets, walls and balustrade posts
- Free survey of the deck, falls, outlets and door thresholds
Building regulations in England
Replacing more than half of a flat roof over a heated room usually counts as renovating a thermal element, so the roof is insulated to around 0.16 W/m²K where that's technically and economically feasible, and the work is notified to building control: the council or a registered building control approver, unless a registered competent person self-certifies it. A roof on a new extension is built to 0.15 W/m²K. Patch repairs, and most unheated detached garages, don't trigger the upgrade. Structural changes, or a new covering that adds 15% or more to the roof's weight, also need approval. More on the rules.
Which nearby areas do we also cover?
- Tyldesley · 2 mi
- Golborne · 3 mi
- Westhoughton · 4 mi
- Hindley · 4 mi
- Newton-le-Willows · 5 mi
- Walkden · 5 mi
Balconies and roof terraces in Leigh: questions
Do you cover Leigh?
Yes. Leigh is part of our Greater Manchester coverage, including postcode districts WN7. Surveys and roofs are carried out by vetted roofing teams working under S&K Property Investments and Improvement Ltd.
Who checks building regulations for a flat roof in Leigh?
Where the work needs approval it goes to Wigan Council building control, or a registered building control approver. We tell you at the survey whether your job needs it and deal with the paperwork as part of the quote.
How much does balcony or terrace waterproofing cost in Leigh?
£1,800–£3,100 for a 12 m² balcony in a liquid-applied system including scaffold, at North West guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Why is water coming through the ceiling below my balcony?
The usual causes are a failed door threshold, a blocked or poorly sealed outlet, or a fixing through the membrane. A survey, sometimes lifting paving, finds the source.
Can I put decking straight onto my flat roof?
Not directly onto the membrane. Decking needs a supporting system that spreads the load and lets water drain, and the roof must be checked for the extra weight.