Greater London · England
Sand mastic for sash & case windows in Motspur Park, Greater London
Window and door surrounds in Motspur Park need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Mastic that needs renewing before redecorating
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
Sand mastic for homes and businesses in Motspur Park
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We are often asked to deal with a silicone bead on a sash window that spoils the look and failed mastic on an exposed elevation, on timber door frames, sash and case windows and brick reveals.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
There’s a 12-month guarantee on every job.
- Location
- Motspur Park (KT3, SW20, KT2)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. In a London area like Motspur Park, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and send you a clear quote.
Advice
How to look after the new joints
So the new joints stay in good condition:
- Sort the mastic before the decorators arrive
- Keep modern sealant off the mastic
- Don’t paint over the new mastic
- Ask the planning authority about consent for listed or conservation-area homes
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
What affects the quote in Motspur Park
Your quote is based on your job. We look at:
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- The product the joint needs
- Working hours on commercial sites
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any previous sealing or DIY work
- Roughly how big the job is
- The address or postcode of the job
- Access, such as stairs, a lift or height
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand.
What we’re called out for in Motspur Park
Timber frames move with the seasons. That movement opens up the mastic joint over time.
People usually contact us when they notice something like this:
- Draughty sash windows at the surround
- Gaps between timber frames and stone or brick
- Cracked mastic round a front door frame
- Crumbling sand mastic round a window
Motspur Park is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What your quote should include
- Is the old sealant removed completely?
- Which colour the sealant will be
- What guarantee comes with the work
- How the joint is cleaned and prepared
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Also near Motspur Park
Other services in Motspur Park
What the job involves on each surface
Stone surrounds
The stone is treated with care while raking out the old mastic.
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Windows and doors in Motspur Park
Historic houses like Southside House (about 0.8 miles north-east) are a reminder that the area around Motspur Park has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like St Matthew's CofE Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Christ Church New Malden, the joint between an old wall and a newer frame is generally the first place rain gets in.
Motspur Park is about 2 miles south-west of Wimbledon, in Greater London. Across the KT3 area, our applicators can take on sand mastic. 764 places in Greater London are on our list, large and small. We also work in London, around 9 miles away.
Work in KT3, SW20 and KT2 works the same way as everywhere else we cover. Streets in the area include Traps Lane, Coombe Road and Coombe Lane, and we cover them all. With the A238 close by, Motspur Park is simple for us to get to. We also cover New Malden (1 mile south-west), West Barnes (1 mile south-east), Coombe (1 mile north-west), Raynes Park (1 mile south-east) and Copse Hill (1 mile north-east). Larger places within reach include London (9 miles north-east), City of Westminster (8 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
What’s near Motspur Park
Typical jobs here are in homes near The Royal Oak Public House, Beverley Park and Coombe Girls' School. The nearest railway station is New Malden station, about 0.5 miles south-west of the centre. Other landmarks nearby include Chessington Castle Hill (4 miles south-west) and Atkinson Morley Hospital (0.8 miles north-east). The countryside around Motspur Park includes Fishpond Wood and Beverley Meads and Kingston Hill Road area.
When it is not the sealant
In fairness, there are a few things sealant will not fix:
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before you book.
Surfaces we seal
- Tenement windows
- Timber door frames
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
Common questions in Motspur Park
Can you help a landlord with a rental near New Malden station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Motspur Park for sand mastic?
Yes, Motspur Park is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Can you match the sealant colour?
We help you choose a colour that suits. The choice depends on the product the joint needs.
Is it possible to take out silicone and use sand mastic instead?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in.
Do you have insurance?
Yes. We are fully insured, with over 20 years’ experience in sealant work.