Greater London · England
Sand mastic for sash & case windows in Lee, Greater London
Sand mastic for Lee and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
- Window mastic to renew ahead of painting
Frames and glazing around Lee
Historic houses like Eltham Palace (about 1.7 miles east) are a reminder that the area around Lee has older buildings as well as new. 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. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of the Good Shepherd, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Lee station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Lee is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Lee is about 2 miles south of Greenwich, in Greater London. For sand mastic in and around Lee, please call 0345 464 0079 or email us for a quick quote. We cover Greater London from our Crawley base. Across Greater London, we cover 764 places, and Lee is one of them. There’s also a page for London, roughly 6 miles from Lee.
Postcode districts we cover here for sand mastic: SE12, SE13 and SE3. Whether your property is on Old Road, Manor Lane and Mallet Road or anywhere close by, our applicators can take on the job. Other places close to Lee include Hither Green (1 mile west), Horn Park (1 mile south-east), Lewisham (1 mile north-west), Ladywell (1 mile west) and Blackheath (1 mile north). Further out, we also cover London (6 miles north-west), City of Westminster (8 miles north-west), Marylebone (8 miles north-west), Kensington (10 miles west), St Pancras (7 miles north-west) and Shoreditch (6 miles north-west).
Landmarks near Lee
Around Lee, our work takes us to homes and buildings near Manor House Gardens, Trinity Church of England School and International Academy of Greenwich, among other places. Lee has its own railway station: Lee station. Well-known places in the area include Lewisham Shopping Centre (1.1 miles north-west) and Prefab Museum (1.3 miles south). Not far away are Summer Hill and Birdbrook Road Nature Reserve.
Sand mastic in Lee
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. Typical jobs include mastic worn away on windows facing the weather and mastic that needs renewing before redecorating, on stone surrounds, sash and case windows and period & listed homes.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
All of our work is guaranteed for twelve months.
- Where
- Lee (SE12, SE13, SE3)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Lee
Can parking be tricky for a visit in Lee?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you help a landlord with a rental near Lee station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages to suit the site.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Should I check with the council before work on a listed or conservation-area home?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
How it works
We keep the work tidy and contained to the area we are working on. The job normally takes anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. For a job in Lee, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Mention any tricky access
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Read more
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Damaged stone surrounds
- Sash cords, weights and draught-proofing of the sashes
- Putty and glazing repairs
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- Sash and case windows
- Timber door frames
- Brick reveals
- Tenement windows
- Stone surrounds
- Period & listed homes
Why act early in Lee
An open joint round the frame lets weather in. Left, water can reach the timber and the wall, so dealing with it now protects both. 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 Lee, the repair is bigger than the sealant job would have been.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why book with us
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
- One-year guarantee on every job
- We are fully insured
Take a look at our cost guide and customer reviews.
Quotes for sand mastic in Lee
Jobs vary more than people expect. The main factors:
- When we can work, for business premises
- The amount of work
- Access and height
- The product the joint needs
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Whether it has been sealed before
- Pictures of the joints, sent by email
- How we’d reach the joints
- If it’s domestic, commercial or a hotel
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or send us an email.
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Have rotten timber repaired before new mastic goes in
- Ask us before painting near the mastic
- Go gently near the mastic when preparing windows
- Check with your local planning authority if your home is listed
Leave the new mastic alone while it firms up. It skins over quickly, but takes longer to harden fully.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Towns and villages near Lee
More services for Lee
For landlords and businesses
We work for landlords and letting agents as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.