Greater London · England
Furzedown Sand Mastic
Sand mastic for Furzedown, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic dropping out of the joint
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
What affects the cost of sand mastic
You’ll get a clear quote before any work starts. It takes into account:
- Mould in or behind the old joints
- The old material and how stubborn it is
- How many areas need sealing
- How much there is to do
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- If someone has resealed it before
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Sand mastic in Furzedown, done properly
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice, and we can replace one with the other. We work on sash and case windows, timber door frames and stone surrounds, and the jobs we see most are gaps between timber frames and stone or brick and tired mastic found when preparing windows for paint.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Location
- Furzedown (SW16, SW17, CR4)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Why it’s worth doing now in Furzedown
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. 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 Furzedown, the repair is bigger than the sealant job would have been.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why us?
- Old sealant always removed completely
- Trusted Arbo and Everbuild sealants
- A 12-month guarantee on all work
- An ARBOMaster approved applicator
Take a look at our cost guide or customer reviews.
Towns and villages near Furzedown
Also in Furzedown
What we do, step by step
Before we leave, we go over the finished joints with you. The visit itself normally takes a few hours for a single window, longer for several, depending on the amount of work. In Furzedown, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- Each surround is checked first.
- 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.
- The finish is dressed neatly.
How to prepare
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
Get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.
Advice
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
When to call us in Furzedown
Some old mastic was never deep enough. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
The problems people generally mention when they call are:
- Wind and rain getting in round a sash window
- Crumbling sand mastic round a window
- Failed mastic on an exposed elevation
- Silicone on a period window that looks wrong
Furzedown is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What to look for in a quote
- What insurance they hold
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- Who turns up on the day
Windows and doors in Furzedown
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In a converted house or block, who looks after the windows depends on the lease, so check that before you book.
Letting a property close to Tooting station? Then older sash windows in a rental need their mastic kept sound to keep the weather out. If you live in an older home near St Paul's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Furzedown is about 3 miles east of Wimbledon, in Greater London. Homes, rented property, offices and hotels in Furzedown can book us for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Furzedown is one of 764 towns and villages in Greater London we cover for sand mastic. For nearby work, see our London page (6 miles or so).
All of SW16, SW17 and CR4 is covered for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on Deal Road, Links Road and Seely Road or a nearby road, our applicators can take on the job. Main roads around Furzedown include the A216, which makes travel easy. Nearby, we also carry out sand mastic in Streatham Park (1 mile north-east), Tooting (1 mile west), Tooting Bec (1 mile west), Streatham (1 mile east) and Colliers Wood (1 mile south-west). We also work in nearby towns such as London (6 miles north-east), City of Westminster (6 miles north), Marylebone (6 miles north), Kensington (6 miles north-west), St Pancras (7 miles north) and Shoreditch (8 miles north-east).
Near you in Furzedown
We work in homes and buildings around The Holland Tringham pub, Figge's Marsh and Furzedown Secondary School, among other places. For rail, the closest station is Tooting station, about 0.6 miles south-west of the centre. Well-known places in the area include St Benedict's Hospital (under half a mile west) and London Sewing Machine Museum (0.9 miles north-west). Green spaces nearby include Battersea Park Lake and Knight's Hill.
When something else is needed
Sealant is not the answer to every problem, and we’ll tell you before we start. It won’t solve:
- Planning or listed building consent (your local planning authority decides)
- Sashes that need overhauling
- Masonry that needs repairing
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Sash and case windows
- Tenement windows
- Stone surrounds
- Brick reveals
FAQs for Furzedown
Is Furzedown in your area for sand mastic?
Yes, Furzedown 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.
Do you work for landlords with property near Tooting station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected.
What exactly is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we’ll talk you through it.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Can you match the sealant colour?
Yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before any work starts.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.