Mastic Sealing in New Malden
Need mastic sealing in New Malden? It’s simple: send details, get a quote, we seal, guaranteed.
- Water getting in round frames after rain
- Old repairs sealed over failed mastic
- Mastic failing across several blocks on an estate
Mastic sealing for New Malden sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Your questions answered
Can you work at a site such as Shannon Commercial Centre, by New Malden?
Yes, sites like Shannon Commercial Centre are within our area, along with the rest of New Malden. A few photographs and the unit address let us price the work.
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Share the building’s contractor rules and we’ll work to them. All of Greater London is inside the ULEZ, and our planning allows for it
Do you take on small jobs?
Single areas, one-off repairs and whole buildings are all quoted the same way: details, then a fixed price, then sealing, then a 12-month guarantee.
Do you need to see the site first?
Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we’ll arrange a visit before quoting.
Can you seal joints high up on a block?
We talk through access for each building when we quote. Tell us the number of storeys and whether scaffold or other access is planned and we will confirm the approach in the quote.
Do you supply RAMS and insurance details?
Let us know your requirements: 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.
What do you charge?
Each job is quoted on its own details. For yours, phone 01277 525 020 or send photos by email.
About our mastic sealing in New Malden
Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you, giving you what you need to notify residents. Communal entrances and stairs stay usable throughout. We work on external wall and movement joints, balcony and threshold joints and shopfronts below residential blocks, and what we’re called in for most is the same joint failures repeated across a portfolio and brittle perimeter mastic across a building. Looking for mastic applicators who cover New Malden? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. Work is planned with the agent so residents get notice and access is arranged in advance.
Every job we finish is backed by a 12-month workmanship guarantee, in New Malden as everywhere else we work. If our installation lets you down in that time, we return and fix it.
- Where
- New Malden (KT3, KT1, SW20)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
After the work
A few simple habits keep the new joints working:
- Check the asbestos register before any old mastic is disturbed
- Track which buildings were done and when
- Avoid piecemeal callouts where you can
- Ask residents or tenants to report leaks and draughts early
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.
Water getting in round frames can damage plaster, decoration and the frames themselves. Early resealing is far simpler than repairs inside.
Nearby places to New Malden
Other services in New Malden
Different surfaces, different methods
Commercial and mixed-use buildings
Commercial occupiers usually stay open during the work, so we plan around them.
Window and door perimeters on blocks
Window and door perimeters are where most mastic failure shows. We remove the failed mastic, prepare the faces, add backing rod if the joint is deep and reseal.
Doing it in-house
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.
The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.
Looking after buildings in and around New Malden
15 care or nursing homes sit less than 2 miles from New Malden. For owners and operators of care buildings, window perimeters and external joints are best renewed in planned phases around residents. Blocks in London are usually run by managing agents, landlords or housing associations, with residents to notify and access to arrange. We plan around the notices and access you arrange.
If your remit includes a building such as Christ Church New Malden CofE Primary School, frame and door mastic can be programmed for the holidays. Buildings close to stations like New Malden station, under half a mile north-east of New Malden, are often flats over shops, with frame mastic to keep sound. Trustees of buildings like New Malden Baptist Church can bring frame and external mastic into a planned maintenance list.
New Malden is about 3 miles south-west of Wimbledon, in Greater London. Any commercial site in New Malden is covered, whether it’s a single job or part of a planned programme. We work across 764 places in Greater London, from busy centres to rural villages. For work in that direction, see our London page.
Commercial sites across KT3, KT1 and SW20 are covered. Streets here include High Street, Ashcombe Square and Melrose Gardens, and sites on any of them can send details for a fixed quote. You’ll find New Malden on or near the B283. Close to New Malden, our area also takes in Motspur Park (1 mile north-east), West Barnes (1 mile east), Norbiton (1 mile north-west), Coombe (1 mile north) and Raynes Park (1 mile east). Further afield, our area takes in London (10 miles north-east), City of Westminster (9 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north), St Pancras (11 miles north-east) and Shoreditch (12 miles north-east).
Near you in New Malden
We work on buildings around Beverley Park, The Glasshouse pub and Holy Cross School and the streets around them. New Malden has its own railway station: New Malden station. Well-known places in the area include Chessington Castle Hill (3.3 miles south) and Bentall Centre (1.9 miles west). Open spaces near New Malden include Rose Walk and Kingston Hill Road area.
Building owners, agents and FMs in New Malden
As a CHAS accredited contractor and Constructionline member, we are straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.
On site: what to expect
Where the site stays busy, we agree a sequence with your contact so the disruption stays in one area at once. Each section is protected, cleaned back and sealed, then handed back before the next one starts. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- We inspect the joints, building by building, and record what has failed and why.
- A fixed quote follows, split by block or building if that suits you.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- We remove the old mastic completely and clean the joint faces back.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
What we need from you
- Confirm the product named in the specification
- Agree which areas must stay open
- Send asbestos survey details if the building is pre-2000
Get a fixed quote
Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, ring 01277 525 020 or email a schedule or drawings.
Advice
Why act early in New Malden
Adding sealant to cyclical maintenance is an easy win. Waiting until leaks appear means working under pressure with less control over timing. 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. Putting it right early is less disruptive than dealing with the consequences.
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
Why choose Mastic Doctor in New Malden
- Clear, fixed quotes
- A Constructionline member, so easy to vet
- Fully insured, including public liability cover
- Over 20 years of commercial sealing
Read what affects the cost and our accreditations.