Greater London · England
Chiswick Sand Mastic
Window and door surrounds in Chiswick need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Patchy fillers round a sash window
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
Sand mastic in Chiswick: local notes
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. With historic houses such as Hogarth's House (about 0.2 miles south-west) nearby, there’s older building stock in the area around Chiswick 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 is traditional sand mastic.
If you look after a building such as The William Hogarth Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Chiswick station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Chiswick is about 1 mile south of Acton, in Greater London. Jobs in Chiswick get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, and Chiswick is one of them. Our London page covers work nearby (7 miles or so).
We work across W4 and SW14 for sand mastic. We cover properties on Pumping Station Road, Dale Street and Devonshire Road and the roads around them. If you are just outside Chiswick, we cover Turnham Green (1 mile south), Old Chiswick (1 mile south-east), Grove Park (1 mile south-west), Gunnersbury (1 mile west) and Strand-on-the-Green (1 mile west). Within a short drive, we also cover London (7 miles east), City of Westminster (5 miles east), Marylebone (5 miles east), St Pancras (6 miles north-east), Shoreditch (8 miles east) and Walthamstow (12 miles north-east).
Landmarks near Chiswick
Typical jobs here are in homes near Polish Library POSK in London, Mawson Arms and Chiswick School. Other local landmarks include Turnham Green (0.5 miles west) and The Swedish School (0.6 miles south-east). Chiswick’s nearest station is Chiswick station, about 0.8 miles south-west of the centre. Other landmarks nearby include West London Hospital (1.5 miles east) and Kurdish Museum Library and Archive (0.8 miles east). The countryside around Chiswick includes Campden Hill and Duke's Hollow.
Sand mastic in Chiswick
A silicone bead around a sash window can look out of place and does not suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on stone surrounds, brick reveals and tenement windows, and people most often call us about gaps between timber frames and stone or brick and patchy fillers round a sash window.
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.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Chiswick (W4, SW14)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
When to call us in Chiswick
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
The problems people generally mention when they call are:
- Old cement repairs round a window that have failed
- Silicone on a period window that looks wrong
- Mastic dropping out of the joint
- Mastic that needs renewing before redecorating
For an older house near a landmark such as St. Nicholas Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
What to look for in a quote
- Whether the sealant suits the joint
- Whether you can choose the colour
- Whether they’re fully insured
- Is VAT in the price?
The process
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes anything from a few hours to a full day, depending on how many windows from start to finish. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Chiswick. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- The finish is dressed neatly.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Mention any tricky access
- Tell us if parking is tricky
Ask for a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or email us with the details.
Read more
Nearby places to Chiswick
What else we do in Chiswick
Why it’s worth doing now in Chiswick
New mastic over crumbling mastic won’t hold. We remove the loose material first so the new work lasts. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Chiswick, the repair is bigger than the sealant job would have been.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- Rated 4.9 stars on Google
- We leave the area clean and tidy
- ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
Read what affects the cost or what customers say.
What the job involves on each surface
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
Timber door frames
Doors face weather and wear and the mastic can crack early. It’s renewed by hand.
When something else is needed
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- Sashes that need overhauling
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Stone surrounds
- Brick reveals
- Sash and case windows
- Tenement windows
What affects the quote in Chiswick
We quote each job individually. This is what makes a difference:
- How many areas need sealing
- Mould in or behind the old joints
- The size of the job
- Access and height
Combining jobs into one visit generally makes better use of the time than several visits. We’ll send you a clear quote for the lot.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
- What the problem is, such as mould, gaps, leaks or cracking
For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before we start.
Common questions in Chiswick
Do you work for landlords with property near Chiswick station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Can you do sand mastic in Chiswick?
Yes. Our work covers London and the South East, and Chiswick is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
Where are you based?
We work from Crawley. We cover Chiswick and the rest of Greater London, along with the rest of our area.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We will tell you what to expect for your job.
Do you have insurance?
Yes. We’re fully insured.
How do I get a quote for sand mastic in Chiswick?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or send us an email with a short description of the job.