Greater London · England
Window & door mastic in Coombe, Greater London
Problem with your window and door frames in Coombe? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Cold air getting in at the frame edge
- Gaps left after new windows were fitted
- Gaps where the sill meets the wall
Quotes for window mastic in Coombe
Every job gets its own quote. These are the things that affect it:
- Working hours on commercial sites
- The amount of work
- Mould in or behind the old joints
- The old material and how stubborn it is
Doing several joints on one visit is normally more efficient than separate visits. You will get one clear quote for the whole job.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Roughly how big the job is
- Whether it has been sealed before
- Any access issues, like height or stairs
- The address or postcode of the job
If you are in Coombe and need window mastic, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
How we handle window mastic in Coombe
Over two decades of sealing frames has taught us which products suit which walls. We are ARBOMaster approved and fully insured, and we give a 12-month guarantee on the work. If you are dealing with cracked or shrunken mastic around the frame and old mastic that has gone black or come away, we can put it right, whatever the surface.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
Our work is backed for twelve months, in Coombe and everywhere else we cover.
- Place
- Coombe (KT2, KT3, SW20)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What window mastic looks like in Coombe
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Christ Church New Malden, frames set in older brick or stone need a sealant that suits the wall as well as the frame. As a London address, Coombe can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Schools such as Coombe Hill Junior School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Coombe is about 1 mile north of New Malden, in Greater London. Every kind of property in Coombe can book us for window mastic. The work is guaranteed for a year. Coombe is one of 764 places in Greater London we cover for window mastic. For nearby work, see our London page (9 miles or so).
We cover every part of KT2, KT3 and SW20 for window mastic. We cover properties on West Road, Crown Road and Traps Lane. We also cover Motspur Park (1 mile south-east), Coombe Hill (1 mile north), Kingston Vale (1 mile north-east), Norbiton (1 mile south-west) and New Malden (1 mile south). We also work in nearby towns such as London (9 miles north-east), City of Westminster (8 miles north-east), Marylebone (8 miles north-east), Kensington (6 miles north-east), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
What’s near Coombe
Around Coombe, our work takes us to homes and buildings near Canbury School, Coombe Girls' School and The Royal Oak Public House. The nearest railway station is Norbiton station, roughly 1 mile south-west. Other landmarks nearby include Bentall Centre (1.8 miles west) and White Lodge Museum (1.8 miles north). Green spaces nearby include Kew Gardens Lake and Kingston Hill Road area.
Places near Coombe
What else we do in Coombe
Landlord and commercial work in Coombe
We work for landlords and letting agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
What the job involves on each surface
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the sealant goes in between frame and wall and tooled smooth.
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it.
The process
When we arrive, we start by going over the job with you. We protect the surfaces around the joints before we start. The work usually takes most of a day for a typical house, less for a few frames. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Coombe. It helps if you can point us to a visitor permit or a bay close to the door.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
How to prepare
- Move anything stored near the joints
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
Read more
Honest limits
It helps to know what we cannot do too:
- Damp problems in the wall away from the window
- A sash or casement that won’t close properly
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- uPVC windows
- Patio & French doors
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
FAQs for Coombe
Can parking be tricky for a visit in Coombe?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can you do window mastic in Coombe?
Yes. We work across London and the South East, and Coombe is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
What should I tell you?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or email us.
Is it messy?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we are done.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Why deal with it now?
Getting a straight, even bead on an outside frame takes practice, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- Homes, businesses and hotels
- Trusted Arbo and Everbuild sealants
- Every job guaranteed for a year
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced and what customers say.