Greater London · England
Sand Mastic in Strand-on-the-Green
Window and door surrounds in Strand-on-the-Green need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Draughty sash windows at the surround
- Modern sealant on a period surround
- Patchy fillers round a sash window
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
How we handle sand mastic in Strand-on-the-Green
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. Renewing it closes the gap so the surround looks right again. We work on stone surrounds, timber door frames and period & listed homes, and the jobs we see most are modern sealant on a period surround and window mastic to renew ahead of painting.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Strand-on-the-Green is something to talk through when you book.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Strand-on-the-Green (W4, TW9, TW8)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
The process
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours for a single window, longer for several. In Strand-on-the-Green, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
- Let us know if you’ve seen damp or leaks
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or send us an email.
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Windows and doors in Strand-on-the-Green
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Historic houses like Kew Palace (about 0.7 miles west) are a reminder that the area around Strand-on-the-Green 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.
Homes close to St Paul's Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Chiswick station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Strand-on-the-Green is about 2 miles south of Acton, in Greater London. Jobs in Strand-on-the-Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Strand-on-the-Green is one of 764 places in Greater London we cover for sand mastic. You can also see our page for London, roughly 8 miles from Strand-on-the-Green.
Here we cover the W4, TW9 and TW8 postcode area for sand mastic. You’ll find streets such as Kew Road, Maze Road and Kent Road, and we cover them all. With the A3000 close by, Strand-on-the-Green is easy for our applicators to reach. Other places close to Strand-on-the-Green include Kew (1 mile south), Grove Park (1 mile east), Gunnersbury (1 mile north), North Sheen (1 mile south) and Turnham Green (1 mile east). We also work in nearby towns such as London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles east), Kensington (3 miles east), St Pancras (7 miles north-east) and Shoreditch (9 miles east).
Landmarks near Strand-on-the-Green
In Strand-on-the-Green, that means homes and buildings near Chiswick School, Kew Green and Bull's Head pub. You will also find Library for Iranian Studies (1.6 miles north) and Kew College Prep (under half a mile south-west). The nearest railway station is Chiswick station, about 0.5 miles south-east. Well-known places in the area include Livat Hammersmith (2.2 miles east) and Barnes Hospital (1.5 miles south-east). Open spaces near Strand-on-the-Green include Richmond Hill and Kew Gardens Lake.
Strand-on-the-Green: your questions answered
Do you work for landlords with property near Chiswick station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Is parking an issue for sand mastic in Strand-on-the-Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Is it possible to take out silicone and use sand mastic instead?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Do you work in Strand-on-the-Green?
Yes. We cover Strand-on-the-Green and the rest of Greater London. To book, phone 0345 464 0079 or email us.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
When to call us in Strand-on-the-Green
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
The problems people normally mention when they call are:
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
- Failed mastic on an exposed elevation
- Gaps round a timber door in stone or brick
Strand-on-the-Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Comparing quotes
- What product goes in the joint
- Whether you can choose the colour
- How hidden problems are handled
- Is VAT in the price?
Nearby places to Strand-on-the-Green
Other services in Strand-on-the-Green
Landlord and commercial work in Strand-on-the-Green
We also work for property managers and facilities teams in Strand-on-the-Green and across Greater London. We can quote a run of properties together, and we are fully insured for the work.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Ask us before painting near the mastic
- Look over the window mastic once a year
- Make sure water runs off the sill
- Ask a joiner to look at soft timber first
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens as more mastic falls out.
What we can’t put right
New sealant can’t fix everything, and we’d rather say so up front. Sealant won’t put right:
- Whether work needs listed building consent
- Decayed frames that need repair
- Putty and glazing repairs
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Tenement windows
- Stone surrounds
- Period & listed homes
- Sash and case windows
- Timber door frames
- Brick reveals
What affects the quote in Strand-on-the-Green
Call for a quick quote. The main things that affect it are:
- Which sealant suits the joint
- Whether there’s mould to deal with
- How easy the joints are to reach
- Any working-time requirements on site
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email and we’ll talk you through it.
Asking for a quote
To make quoting easier, let us know:
- Any previous sealing or DIY work
- Roughly how big the job is
- The address or postcode of the job
- Access, such as stairs, a lift or height
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and send you a clear quote before any work starts.