Facade and window perimeter sealing in Merton, Greater London
Planning work on a facade joint in Merton? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Sealant pulling away from frames or panels
- Cladding panel joints that have opened up
- Leaks at window and door perimeters
Facade sealing for businesses in Merton
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Facade sealing in Merton
Most facade joint failures trace back to the joint, not just the sealant. The width has to suit the expected movement and the sealant’s movement capability, and closed-cell rod sets the depth, keeping the bond to two faces, often at around 2:1 width to depth, as the manufacturer advises. We work on cladding panel joints, perimeter joints where frames meet the structure and stone and brick facade joints, and the failures we are asked to look at most are previous reseals run over old sealant and damp patches beside frames after rain. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Merton is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Every London site, Merton included, is inside the ULEZ, which applies to deliveries and contractors’ vans alike. Alongside that, sites usually need booked deliveries and a plan for where materials go.
Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.
- Where
- Merton (SW19)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Different surfaces, different methods
Brick and stone facades
Stone can absorb plasticisers from the wrong sealant. The specified stone-compatible sealant is what we use, and mask the edges carefully.
Perimeter joints at frames and structure
Perimeter joints at frames often show their age first. They are cut out, cleaned, backed and resealed.
How a job runs
Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We look at the joints, the drawings and the access before pricing.
- Failed sealant is cut out along its full length.
- Both faces are cleaned and, where the product needs it, primed.
- Closed-cell rod fixes the depth, and the sealant grips two sides only.
- A facade-grade sealant rated for the movement goes in, tooled to a concave profile.
- The completed runs are checked with you, then the 12-month guarantee applies.
What we need from you
- Have the specification and drawings to hand
- Warn occupants and staff about the work
- Move anything stored against the joints
Getting a fixed quote
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.
Advice
When to call us in Merton
New sealant run over old sealant rarely holds. Cured silicone won’t accept a new silicone bead, so the new bead peels away within a season or two.
Things that usually lead to an enquiry:
- Air leaks through failed facade joints
- Previous reseals run over old sealant
- Gaps between rainscreen or cladding panels
- Facade joints cracked through the middle
For a contractor working at a hospital such as St George's Hospital, which lies north-east of Merton, perimeter and facade sealing is planned around patients and deliveries.
What to look for in a quote
- How the joint faces will be prepared and primed
- Who will actually carry out the work
- How they’ll work around occupants
- Will failed sealant be removed rather than covered?
Why it’s worth doing now in Merton
Leaving failed perimeter sealant also makes the eventual job bigger: wet edges break down, so repairs may be needed before resealing. Acting at the first sign of splitting keeps the fix simple. Failed sealant in a building in Merton can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.
Why appoint us
- Fixed quotes based on photographs, drawings or a visit
- Colours confirmed for the specified product
- Specification-led, product-correct work
- Over 20 years of commercial sealing
Cost factors for facade joints
Your fixed quote is built from the real scope. It allows for:
- How much there is to seal
- The product specified
- The size and state of each joint
- The site’s rules and procedures
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits.
What to include in your enquiry
The more we know, the firmer the quote. Helpful details to send:
- The site address and postcode
- A wide shot and a close-up of the area
- The product your specification calls for
- Approximate linear metres or a joint schedule
For a fixed quote, ring 01277 525 020 or email drawings and photos with the site address and an outline of the work. You can also send details through our quote form.
Building owners, agents and FMs in Merton
CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.
Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, with each stage agreed with your site contact.
Mastic packages on Merton sites
As part of Greater London, Merton is inside the ULEZ, which applies to every van on site. Add booked deliveries and tight storage, and the mastic package needs planning with the site team. A 2-mile radius around Merton takes in a good number of hotels. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades.
On a campus such as Kingston University Roehampton Vale Campus, 3.1 miles north-west of Merton, new teaching buildings and residences are normally built and refurbished around the academic year. Hotel extensions and refits, at places such as Antoinette Hotel (under half a mile north-west of Merton), typically run between busy periods, so the sealing is squeezed into short windows.
Merton is about 1 mile south-east of Wimbledon, in Greater London. Anywhere in SW19, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 764 places in Greater London. Our London page has more on work in that area, about 7 miles away.
Commercial sites across SW19 are covered for facade joints. Streets here include High Path, Pincott Road and Hayward Close. Merton sits on or close to the A24, useful when we plan access and materials. Sites close to Merton are covered too, including Merton Abbey (1 mile east), South Wimbledon (1 mile north-west), Colliers Wood (1 mile east), Tooting Bec (1 mile north-east) and Summerstown (1 mile north). Bigger towns within reach include London (7 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north) and Shoreditch (9 miles north-east).
Landmarks near Merton
In Merton, that means premises near The Nelson Arms, Wimbledon School of Art and Wandle Park, among other places. For rail, the closest station is Haydons Road station, about 0.8 miles north. Other landmarks nearby include Southside Wandsworth (2.8 miles north) and St George's Hospital (1.1 miles north-east). Green spaces nearby include Henman Hill and Merton Park Green Walks.
Towns and villages near Merton
What else we do in Merton
Questions about Merton
Would you work within a site like St George's Hospital?
Yes. Healthcare sites are among the places we work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Can you work around term dates at a campus such as Kingston University Roehampton Vale Campus?
Yes. We plan campus work around teaching, exams and residence turnarounds. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Can the sealant be colour-matched?
That depends on the product. Some ranges are wide, others limited, so we’ll confirm the colours available for the specified product with the quote.
How many days will you need on site?
That varies with the scale of the job, though a typical visit normally takes longer on a full elevation than on a handful of window perimeters, and it always depends on dry weather. For bigger or phased jobs, we’ll set out a timescale with the quote.
Can you send site paperwork?
Requirements differ from site to site, so list what you need, whether RAMS, insurance or CSCS details, and we will confirm with the quote.
How much does the work cost?
There isn’t a price list, because every site is different. Send photos or drawings and we will price it at a fixed figure.
Do you seal on top of existing sealant?
No, never. Sealing over old material is one of the classic causes of early joint failure, so it all comes out first.