Greater London · England
Sand mastic for sash & case windows in West Heath, Greater London
We cover West Heath for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Gaps round a timber door in stone or brick
- Weathered mastic on the most exposed windows
- Tired mastic found when preparing windows for paint
How we handle sand mastic in West Heath
On many period windows, sand mastic looks right and suits the building. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. We work on sash and case windows, period & listed homes and timber door frames, and people most often call us about draughty sash windows at the surround and old cement repairs round a window that have failed.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
Each job carries a 12-month guarantee, large or small.
- Location
- West Heath (DA7, DA16, SE2)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
All our tools and materials come with us in the van. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours per window, depending on the condition of the joints. In a London area like West Heath, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Mention any parking rules near the property
- Clear the area around the work
How to get a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Advice
Your questions about sand mastic in West Heath
I let a flat near Abbey Wood station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Can you do sand mastic in West Heath?
Yes, West Heath is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Is sand mastic better than silicone for my windows?
We’ll talk it through with you. Period homes often look best with sand mastic, and modern sealants suit newer frames.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover West Heath, along with the rest of our area.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Is it possible to take out silicone and use sand mastic instead?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages to suit the site.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
When to call us in West Heath
Over the years, sand mastic weathers. It hardens, cracks and starts to come away on the stone or timber.
If you can see any of these, it’s time to have the joints looked at:
- Patchy fillers round a sash window
- Weathered mastic on the most exposed windows
- Window mastic to renew ahead of painting
- Silicone on a period window that looks wrong
Letting a property close to Abbey Wood station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Before booking anyone
- Which colour the sealant will be
- Whether they seal over old material or remove it
- Whether they’re fully insured
- What happens if the job turns out different
Windows and doors in West Heath
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Danson House (about 1.5 miles south) nearby, there’s older building stock in the area around West Heath as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
As a London address, West Heath can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Homes close to St Andrew's include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
West Heath is about 1 mile north-east of Welling, in Greater London. Whether you’re in the middle of West Heath or further out, sand mastic is available for homes and businesses alike. West Heath is one of 764 places in Greater London where we work. We also work in London, about 10 miles from West Heath.
Every address in DA7, DA16 and SE2 is within our area for sand mastic. If you need sand mastic at a property on Hurst Lane, Hadlow Road and Denton Road or anywhere close by, our applicators can take on the job. Being close to the A206, West Heath is easy for our applicators to reach for sand mastic. Nearby, we also carry out sand mastic in Abbey Wood (1 mile north-west), Crook Log (1 mile south), Lessness Heath (1 mile north-east), Upton (1 mile south) and Bexleyheath (1 mile south-east). We also work in nearby towns such as London (10 miles west), City of Westminster (12 miles west), Marylebone (12 miles west), Kensington (14 miles west), St Pancras (11 miles west) and Shoreditch (9 miles west).
Near you in West Heath
In West Heath, that means homes and buildings near Co-op pub, Lesnes Abbey Woods and Welling School and the streets around them. West Heath’s nearest station is Abbey Wood station, about 1 mile north. Nearby you’ll also find Broadway Shopping Centre (1.7 miles south-east) and Bexley Hospital (1.4 miles south). Green spaces nearby include Crossness Nature Reserve.
How we quote for sand mastic
You’ll get a clear quote before work begins. It takes into account:
- The number of rooms or windows
- Access and height
- When we can work, for business premises
- Whether there’s mould to deal with
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before work begins.
What we need to know
To help us quote quickly, let us know:
- Any previous sealing or DIY work
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- Where the job is, and your postcode
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Why deal with it now?
If you’re redecorating, renew the mastic first. Painting over failed mastic doesn’t seal it, and the new mastic is traditionally left unpainted. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in West Heath.
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why book with us
- Old sealant always removed completely
- Arbo and Everbuild products
- More than 20 years in sealant work
- Neat joints and a tidy finish
Landlords, agents and businesses in West Heath
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Nearby places to West Heath
Other services in West Heath
DIY sealant or a professional job?
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.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Damaged stone surrounds
- Sashes that rattle, stick or will not open
- Decayed frames that need repair
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Where we work in West Heath
- Period & listed homes
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows