Pitched roofs, flat roofs, tile and slate finishes: Lian Construction replaces London roofs for homes and commercial buildings, with insulation upgrades and roof details specified to protect the property long term.
Merton overview
Roof Replacement in Merton
Wimbledon's price growth is driving refurbishment demand, with only a handful of dedicated roofing contractors covering the borough. Merton falls well within the South West London ground Lian Construction covers on a regular basis. For roof replacement projects in Merton, that local knowledge means fewer surprises once work is on site and a team that already understands the borough's typical property stock.
Merton's housing stock reflects its position as an outer London borough that developed in waves from the Victorian era through to the interwar suburban boom. Areas closer to Wimbledon tend to have larger Victorian and Edwardian villas and terraces, many built for a more prosperous commuter market, while surrounding streets carry the bay-fronted terraced housing typical of London's inner-outer ring. Further out, 1920s and 1930s semi-detached houses are common, built as London's suburbs expanded along the tram and rail lines, along with pockets of post-war infill and some purpose-built flats. This mix means roof types vary considerably across the borough, from slate and clay tile pitched roofs on older properties to felt or asphalt flat roofs on extensions and later additions. Older properties in particular tend to carry original roof coverings well past their practical lifespan, since replacement is disruptive and often deferred until problems become visible internally. For homeowners and landlords, this generally means roofs, guttering and chimney stacks on period stock are worth checking on a regular basis rather than waiting for a leak to force the issue.
Wimbledon's continued price growth is pushing more homeowners toward refurbishing rather than moving, since improving an existing property is often more cost-effective than trading up in a rising market. This tends to increase demand for structural work, extensions and roof repairs or replacements, particularly where owners are looking to protect or add value ahead of a future sale. At the same time, the borough appears to have relatively few dedicated roofing contractors compared to the level of demand, which can mean longer lead times for quotes and bookings, especially during busier periods of the year. For homeowners, this makes it worth getting roof surveys and repair quotes booked in early rather than waiting until a problem becomes urgent, since availability can be tighter than in areas with more roofing specialists to choose from. Landlords managing rental stock in and around Wimbledon face a similar pressure, needing roofing and refurbishment work completed reliably to keep properties lettable and compliant. Given the limited number of specialist contractors, homeowners and landlords alike may find it sensible to build a relationship with a contractor ahead of time rather than searching from scratch when an issue arises.
Typical roof replacement prices in London
Item
Typical range
Pitched roof, concrete tile
£120–£220/sqm
Pitched roof, natural slate
£180–£320/sqm
Flat roof, EPDM rubber membrane
£80–£120/sqm
Typical semi-detached re-roof (45–60 sqm)
£5,400–£13,200
Lead flashing repair/renewal, per chimney junction
£350–£800
General London market guidance, not a fixed quote — actual pricing depends on a site survey. Full breakdown: cost guide.
What we check during the roof survey
Before we quote, someone comes out and looks at the roof properly rather than guessing from the road. That means getting onto the roof or up a ladder where access allows, checking the pitch, the condition of the covering, ridge and hip tiles, valleys, flashings around chimneys and abutments, and any obvious sagging or displaced tiles. We also go into the loft, if there is one, to look at the underside of the roof timbers, the felt or membrane from below, insulation levels, and signs of damp staining or daylight coming through. Moisture readings on exposed timber tell us more than a visual check alone. On terraced and semi-detached houses we'll also note the party wall line, gutter runs shared with next door, and where scaffolding would need to stand. For flat roofs we check the falls, the condition of the upstands, and how water is getting away at the outlets. We take photos and measurements as we go, partly to size materials accurately and partly so you can see what we saw rather than take our word for it. The survey is what the quote is based on, so a rushed one usually means a quote that changes once the roof is stripped.
Getting the property ready before scaffold goes up
A few practical things make the job run more smoothly once it starts. Loft space needs clearing or at least pulling away from the hatch, since we'll be up there checking timbers and running insulation, and stored boxes get in the way and risk damage from dust. If cars are parked where the scaffold or skip needs to go, they'll need to move before the first day, and on narrow London streets it's worth checking with neighbours early since scaffold poles and a skip can take up more pavement or road than people expect. Anything valuable or breakable in rooms directly under the roof is worth moving or covering, since vibration from tile removal does travel through the structure. If the property is let, tenants need proper notice of dates, expected noise levels, and when scaffolding will restrict access to windows for cleaning or escape routes, which matters for fire safety compliance in HMOs. We'll also ask about access to an outside tap or power point for the duration, and where deliveries can be dropped without blocking the street. None of this is complicated, but sorting it before scaffold goes up avoids delays once the crew is on site.
Pitched roof, flat roof, tile and slate replacementRoof surveys and clear replacement scopesInsulation and ventilation considered during replacementRegular coverage of Merton and the wider South West London area
Signs to look for
Do you need roof replacement in Merton?
Daylight is visible through the roof timbers when you go up into the loft, particularly around ridges, valleys or chimney junctions.
Damp patches or brown staining are spreading across bedroom or loft ceilings, especially worsening after periods of heavy rain.
The roofline sags or dips visibly when viewed from the street, suggesting the rafters or roof trusses have weakened.
A flat roof's felt is cracking, bubbling or holding standing water for more than 48 hours after rain has stopped.
How the work is handled in Merton
Step 1Survey the existing roof
Step 2Confirm materials and access
Step 3Remove failed coverings safely
Step 4Install, weatherproof and inspect
Questions
Roof Replacement questions in Merton
How quickly can Lian start roof replacement projects in Merton?
Merton is part of our regular South West London coverage, so once we've surveyed the property we can usually confirm a start date quickly. Send the address and scope and we'll arrange the next step.
Do you cover all of Merton?
Yes. Merton falls within the area Lian Construction serves across Greater London.
Is it better to refurbish my Wimbledon property or sell and move given current price growth?
This depends heavily on your individual circumstances, so it's not something we'd give a blanket answer on. That said, with prices in the area continuing to rise, many owners find that refurbishing and extending works out more cost-effective than moving, particularly given stamp duty and moving costs on a like-for-like purchase. A good starting point is getting a realistic quote for the work you're considering so you can compare it against local moving costs before deciding.
Do I need planning permission for a roof replacement?
In most cases, no. Replacing a roof with the same or a very similar covering usually falls under permitted development, provided the property isn't listed and there's no Article 4 direction removing that right locally. Conservation areas can be more restrictive, particularly if you're changing the material, such as going from slate to tile, or adding rooflights on a front elevation. If you're unsure, we check the specific planning constraints for your address before finalising the specification, since this affects both material choice and cost.
What's the difference between felt, GRP and EPDM for flat roofs?
Traditional felt (built-up bitumen) is the cheapest option but has the shortest lifespan, often 10 to 15 years, and is more prone to splitting and ponding over time. GRP (fibreglass) gives a seamless, hard-wearing finish that suits roofs seeing foot traffic, though it needs good ventilation during installation. EPDM is a rubber membrane with fewer joints, flexible in cold weather and typically rated for 25 years or more. TPO is a newer single-ply option with welded seams, often used on larger or commercial warm-roof builds. The right choice depends on roof size, falls and use, not price alone, and we'll recommend based on your specific roof.
How much does a roof replacement cost in London?
It's difficult to give a figure without seeing the roof, since size, pitch, access, material and the condition of the timber underneath all move the price significantly. A straightforward re-tile on a terraced house is a different job to a complex hipped roof with dormers, or a flat roof extension needing a full warm roof build-up. We survey the roof and provide a written quote that sets out what's included, covering, underlay, battens, flashings and scaffolding, so you can see where the cost is coming from rather than working from a rough estimate over the phone or a per-square-metre rule of thumb that ignores your property.
Talk to Lian Construction about Merton
Send the site address in Merton, photos if available, and the roof replacement work you need. We can review the scope and arrange the next step.