Mastic sealant contractors in Colliers Wood
Planning work on a mastic joint in Colliers Wood? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Leaks at window and door perimeters
- Occupiers reporting cold air round windows
- The same joint failures repeated across a portfolio
Mastic sealing near Colliers Wood
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our mastic sealing in Colliers Wood
Managing agents and housing associations typically need paperwork before anyone starts. For documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We are CHAS accredited and a Constructionline member, with public liability insurance. Most enquiries involve brittle perimeter mastic across a building and failed external movement joints, on window and door perimeters on blocks, balcony and threshold joints and communal entrances and stairwells. A single leaking joint is often how a building in Colliers Wood first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Across Greater London, Colliers Wood included, the ULEZ applies, and parking and loading rules differ from street to street. For block-wide work, a place to park and store materials saves time on every visit.
Work we carry out comes with a 12-month guarantee. If an installation problem shows up, speak to us on 01277 525 020 or email us and we’ll arrange a return visit.
- Where
- Colliers Wood (SW17, SW19, CR4)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
How a job runs
Occupied buildings need a little choreography. We sign and contain the area we’re in, keep walkways clear and move on in phases so staff and visitors can carry on around us. In Colliers Wood, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.
- First comes a look at the joints and, for older buildings, the asbestos records.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- The joints are prepared and resealed with the right product.
- We finish each building before moving to the next.
What we need from you
- Send asbestos survey details if the building is pre-2000
- Warn occupants and staff about the work
- Let us know about inductions and permits
Getting a fixed quote
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.
Advice
Aftercare for building managers
Regular inspection catches problems early. In particular:
- Avoid piecemeal callouts where you can
- Check the asbestos register before any old mastic is disturbed
- Start inspections with the most exposed faces
- Track which buildings were done and when
If a joint we sealed fails within 12 months, tell us and we’ll look at it. After that, regular inspection keeps the programme on track.
Mastic fails gradually, then all at once in a wet spell. Resealing when cracking first shows avoids water damage and saves internal repairs.
Planned mastic for Colliers Wood portfolios
There are five care or nursing homes within about 2 miles of Colliers Wood. Care home owners need frame and external mastic kept sound without unsettling residents. London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We work to your notice and access plan.
If you own or manage units on a site such as College Fields Business Centre (0.5 miles south-west of Colliers Wood), failed mastic on frames, door surrounds and external joints can be dealt with unit by unit. Site managers at schools like Sellincourt Primary School can fit frame mastic into the summer works. Student accommodation around universities such as Kingston University Roehampton Vale Campus (3.8 miles west of Colliers Wood) is normally managed block by block, which suits a planned mastic programme.
Colliers Wood is about 5 miles south of Brompton, in Greater London. We cover commercial sites throughout Colliers Wood, for single jobs and planned programmes alike. We work across 764 places in Greater London, from busy centres to rural villages. There’s a separate page for London, roughly 6 miles from Colliers Wood.
We take on mastic joints across the SW17, SW19 and CR4 postcode area. For a building on Acre Road, Boyd Road and Park Road or nearby, send details and we will quote for mastic joints. Nearby places we also cover include Tooting (1 mile north), Tooting Bec (1 mile north), Merton Abbey (1 mile south-west), Furzedown (1 mile north-east) and Eastfields (1 mile south-east) for mastic joints. Nearby towns on our patch include London (6 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north) and Shoreditch (8 miles north-east).
What’s near Colliers Wood
We work on buildings around Figge's Marsh, Ensham School and The Royal Standard pub, among other places. There’s a railway station in Colliers Wood itself: Tooting station. A little further out are Grove Hospital (0.6 miles north) and Wandle Industrial Museum (1.2 miles south). The countryside around Colliers Wood includes Henman Hill and Myrna Close.
How the job changes by surface
Tenement and older buildings
Stone needs a neutral-cure product, so we pick a grade that won’t mark it.
External movement joints
Brickwork, blockwork and panel joints let a building move. Once that sealant goes, rain can reach the wall.
What sets the cost
Before we quote, we look at:
- Joint width, depth and condition
- Which sealant the job calls for
- The total length or number of joints
- Travel to remote or island sites
The price depends on how many linear metres there are, what has to come out first and how the joints are reached. Call for a quote when you are ready.
Before you send an enquiry
Good information means a firmer quote. When you get in touch, include:
- Specification clauses that apply
- Whether the building will be occupied during the work
- Drawings or a marked-up plan, if available
- The site address and postcode
For a fixed quote, speak to us on 01277 525 020 or email drawings and photos with the site address and an outline of the work. Our quote form is another easy route.
Why act early in Colliers Wood
Looking at mastic during planned maintenance costs little. Waiting until leaks appear means working under pressure and less choice about when. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote and we will put a fixed figure on it.
What you get with us
- Work carried out by CSCS-carded applicators
- RAL and finish matching where the product range allows
- Failed material removed, not covered up
- Health and safety: CHAS accredited
Read our cost guide and how we’re accredited.
When it isn’t the sealant
Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. It won’t fix:
- Glazing that needs replacing
- Substrate edges that need repairing first
- Leaks from above rather than through a joint
If in doubt, call 01277 525 020 or send details through our quote form and we’ll say what we think.
What we seal
- External wall and movement joints
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Balcony and threshold joints
- Communal entrances and stairwells
- Communal kitchens and washrooms
Places near Colliers Wood
What else we do in Colliers Wood
Common questions from Colliers Wood clients
Do you take on jobs in Colliers Wood where loading and access are tightly controlled?
Yes, we plan every London job around the building’s own access rules. Share the building’s contractor rules and we will work to them. The ULEZ covers the whole of Greater London, which we allow for
We manage a building near Tooting station. Can you help?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Send the address, photographs of the elevations and your access arrangements, and we will give a fixed quote.
How do you handle work on occupied blocks?
We plan around people living or working in the building. Dates and areas are agreed with you so residents or tenants can be told and communal access is kept open.
Will you just go over the old sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
Do you do block-wide mastic programmes?
We can. Each building is inspected, quoted and scheduled in turn, and the programme can start with the worst.
What paperwork can you provide?
Let us know your requirements: tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We hold CHAS accreditation and Constructionline membership.
Can you seal joints high up on a block?
It depends on the building. How upper joints are reached is agreed before work is booked so there are no surprises.