Greater London · England
Sand mastic for sash & case windows in Shooter's Hill, Greater London
Our applicators work in Shooter's Hill on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Tired mastic found when preparing windows for paint
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
How we handle sand mastic in Shooter's Hill
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes, where modern sealant can look out of place. We’re often asked to deal with wind and rain getting in round a sash window and mastic round period door frames that has failed, on brick reveals, stone surrounds and period & listed homes.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Shooter's Hill as anywhere.
We stand behind the work with a one-year guarantee.
- Place
- Shooter's Hill (SE18, SE9, DA16)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
When something else is needed
We’d rather tell you now than do work that will not last, so these are the limits:
- Masonry that needs repairing
- Broken panes
- Sash cords, weights and draught-proofing of the sashes
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in Shooter's Hill
- Period & listed homes
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
- Timber door frames
Your questions about sand mastic in Shooter's Hill
Is parking an issue for sand mastic in Shooter's Hill?
Parking in Shooter's Hill, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
I let a flat near Falconwood station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
How do I get a quote for sand mastic in Shooter's Hill?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before any work starts.
Is consent needed for window work on a listed home?
Checking first is sensible. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Is it OK to seal over old sealant?
No. The old sealant always comes out first.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
What affects the quote in Shooter's Hill
Every job gets its own quote. These are the things that affect it:
- Which sealant suits the joint
- The number of rooms or windows
- The old material and how stubborn it is
- The number and length of the joints
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
When you contact us, it’s useful to know:
- The address or postcode of the job
- The type of property
- What’s wrong with the joints now
- Pictures of the joints, sent by email
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
How it works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to a full day, depending on how many windows. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
- Clear items away from the joints we are working on
How to get a quote
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Windows and doors in Shooter's Hill
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. 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.
Schools such as Shooters Hill Sixth Form College are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. Shooter's Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Shooter's Hill is about 1 mile south-west of Plumstead, in Greater London. Anywhere in SE18, our applicators can take on sand mastic. We cover 764 towns and villages across Greater London, large and small. For nearby work, see our London page (7 miles or so).
We work across the SE18, SE9 and DA16 postcode area for sand mastic and the streets around it. You will find streets such as Brent Road, Dover Road and Kinlet Road. We also cover the places around Shooter's Hill: Kidbrooke (1 mile west), Well Hall (1 mile south-west), East Wickham (1 mile east), Avery Hill (1 mile south) and Plumstead (1 mile north-east). We also work in nearby towns such as London (7 miles west), City of Westminster (10 miles west), Marylebone (10 miles west), Kensington (12 miles west), St Pancras (9 miles north-west) and Shoreditch (7 miles north-west).
What’s near Shooter's Hill
We work in homes and buildings around The Bull Public House, Eaglesfield Park and Deansfield Primary School and the streets around them. For rail, the closest station is Falconwood station, roughly 0.9 miles south-east of the centre. Well-known places in the area include Gallions Reach Shopping Park (2.9 miles north) and Greenwich Castle (3 miles west). The countryside around Shooter's Hill includes Summer Hill and Birdbrook Road Nature Reserve.
Signs you need sand mastic in Shooter's Hill
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
The problems people normally mention when they call are:
- Window mastic to renew ahead of painting
- Gaps round a timber door in stone or brick
- Silicone on a period window that looks wrong
- Gaps where the frame meets the masonry
Rented homes near Falconwood station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Comparing quotes
- What insurance they hold
- Which colour the sealant will be
- Whether the sealant suits the joint
- What guarantee comes with the work
Nearby places to Shooter's Hill
Also in Shooter's Hill
Why it’s worth doing now in Shooter's Hill
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Shooter's Hill, the repair is bigger than the sealant job would have been.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and send you a clear quote before we start.
Why Shooter's Hill customers choose us
- Quality sealants from Arbo and Everbuild
- Domestic, commercial and hotel work
- An ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
Take a look at what affects the cost and what customers say.