Greater London · England
Sand Mastic in Kidbrooke
Sand mastic for Kidbrooke and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Cement or filler used on old window joints that has cracked
- Gaps between timber frames and stone or brick
- Mastic dropping out of the joint
Sand mastic for homes and businesses in Kidbrooke
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, applied by hand. On older homes, it suits the building far better than silicone. If you have modern sealant on a period surround and mastic worn away on windows facing the weather, we can help, whatever the surface.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease generally says who is responsible for the windows, so it’s worth checking before booking, and access in Kidbrooke is something to talk through when you book.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or drop us an email.
- Where
- Kidbrooke (SE3, SE9, SE18)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Period and listed homes
A traditional finish suits a period property, and sand mastic is one of them.
Stone surrounds
Old stone surrounds are often uneven, so the joint varies in width. We shape it by hand to follow the stone.
Sand mastic in Kidbrooke: local notes
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. With historic houses such as Eltham Palace (about 1.3 miles south) nearby, there’s older building stock in the area around Kidbrooke as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Kidbrooke station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. As a London address, Kidbrooke can be tricky for parking: let us know about parking bays, permits or a driveway.
Kidbrooke is about 2 miles north of Eltham, in Greater London. Jobs in Kidbrooke get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, large and small. We also work in London, around 6 miles away.
Jobs for sand mastic in SE3, SE9 and SE18 works the same way as everywhere else we cover. If you need sand mastic at a property on Brome Road, Briset Road and Nesbit Road or a nearby road, we can help. We also cover the places around Kidbrooke: Well Hall (1 mile south-east), Shooter's Hill (1 mile east), Middle Park (1 mile south), Horn Park (1 mile south-west) and Blackheath (1 mile west). Larger places within reach include London (6 miles west), City of Westminster (9 miles west), Marylebone (9 miles north-west), Kensington (11 miles west), St Pancras (8 miles north-west) and Shoreditch (7 miles north-west).
Local landmarks in Kidbrooke
In Kidbrooke, that means homes and buildings near Thomas Tallis School, The Halley Academy and Eltham Common and the streets around them. Kidbrooke’s nearest station is Kidbrooke station, about 0.7 miles west of the centre. Other landmarks nearby include Brook General Hospital (0.5 miles north-east) and Lewisham Shopping Centre (2.4 miles west). The countryside around Kidbrooke includes Birdbrook Road Nature Reserve and Summer Hill.
How we quote for sand mastic
Your quote is based on your job. We take into account:
- How many areas need sealing
- Which sealant suits the joint
- Mould in or behind the old joints
- The old material and how stubborn it is
What it costs depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What to tell us for a quote
When you contact us, these details help:
- Any access issues, like height or stairs
- The rough size of the job
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
Asking for a quote is easy: let us know what needs doing and where. Photos by email help us understand the job, and we will come back to you with a quote.
Common problems we fix in Kidbrooke
Most of it is simply age. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
Any of these means the joints need attention:
- Silicone on a period window that looks wrong
- Weathered mastic on the most exposed windows
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps round a timber door in stone or brick
For site and facilities teams at buildings such as Henwick Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Before booking anyone
- How long to leave it before use
- How long the guarantee is
- Are they insured?
- Is the old sealant removed completely?
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the 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.
Questions from Kidbrooke
Do you cover Kidbrooke for sand mastic?
Yes, Kidbrooke is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear price.
Can you help a landlord with a rental near Kidbrooke station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Can you do several jobs on one visit?
Yes. Just list everything you need.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
What should I tell you?
A short description and the location, plus photos if you have them. If we need more, we’ll ask.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses, and we’re fully insured.
Towns and villages near Kidbrooke
Also in Kidbrooke
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
For anyone letting property in or around Kidbrooke, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. 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 Kidbrooke, the repair is bigger than the sealant job would have been.
Combining jobs into one visit generally makes better use of the time than several visits. We will send you a clear quote for the lot.
Why Kidbrooke clients choose us
- 4.9 on Google from 180+ five-star reviews
- Any old sealant cut out fully, not covered over
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
Take a look at our cost guide and customer reviews.
How it works
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours for a single window, longer for several. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
How to get a quote
Want a quote for sand mastic? Please call 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear quote before we start.