Greater London · England
Sand mastic for sash & case windows in Hounslow West, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Hounslow West. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps between timber frames and stone or brick
- Failed mastic on an exposed elevation
- Wind and rain getting in round a sash window
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Damaged stone surrounds
- Decisions on consent for listed homes
- Timber that has rotted
If you’re not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Brick reveals
- Period & listed homes
- Timber door frames
- Sash and case windows
- Stone surrounds
- Tenement windows
How we handle sand mastic in Hounslow West
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we’ll explain which is best for yours. We work on brick reveals, sash and case windows and stone surrounds, and the jobs we see most are wind and rain getting in round a sash window and old sand mastic that has cracked, crumbled or fallen out.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or send us an email.
- Place
- Hounslow West (TW4, TW3, TW5)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
On the day, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work starts. The work generally takes a few hours per window, depending on the condition of the joints. For a job in Hounslow West, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- 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.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
How to get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.
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How the job changes by surface
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Go gently near the mastic when preparing windows
- Check with your local planning authority if your home is listed
- Avoid patching sand mastic with silicone
- Have rotten timber repaired before new mastic goes in
Don’t touch or press the mastic while it hardens. It forms a skin fairly soon, but takes longer to harden fully.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Signs you need sand mastic in Hounslow West
Most of it is simply age. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
The problems people usually mention when they call are:
- Tired mastic found when preparing windows for paint
- Modern sealant on a period surround
- Mastic dropping out of the joint
- Draughty sash windows at the surround
As a London address, Hounslow West can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before booking
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
- The length of the guarantee
- Who turns up on the day
What else we do in Hounslow West
Frames and glazing around Hounslow West
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 Osterley House (about 2.1 miles north-east) nearby, there’s older building stock in the area around Hounslow West as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Homes close to Church of St Paul include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in. Rented homes near Hounslow station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Hounslow West is about 2 miles west of Hounslow, in Greater London. Jobs in Hounslow West get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Hounslow West is one of 764 places in Greater London we cover for sand mastic. You can also see our page for London, about 13 miles away.
Every address in TW4, TW3 and TW5 is covered for sand mastic. If you need sand mastic at a property on Ivy Lane, Toad Lane and Bath Road or anywhere close by, we can help. Main roads around Hounslow West include the A3006 and A3063, so getting to you is simple. Close by, we work in Heston (1 mile north), Lampton (1 mile east), North Hyde (2 miles north), Hounslow (2 miles east) and Woodlands (2 miles east). Within a short drive, we also cover London (13 miles east), City of Westminster (11 miles east), Marylebone (11 miles east), Kensington (8 miles east), St Pancras (12 miles east) and Shoreditch (14 miles east).
Around Hounslow West
In Hounslow West, that means homes and buildings near Hounslow Heath, The Heathland School and Gunnersbury Catholic School and the streets around them. Hounslow West’s nearest station is Hounslow station, roughly 1.2 miles east. Nearby you’ll also find Museum of Army Music (1.9 miles south-east) and Hounslow Hospital (0.7 miles east). Green spaces nearby include Richmond Hill and Garden Lake.
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
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.
Questions from Hounslow West
Is parking a problem for a job in Hounslow West?
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.
Is Hounslow West in your area for sand mastic?
Yes. We work across London and the South East, and Hounslow West is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
How long will you be here?
Typically it takes a few hours for a single window, longer for several. Bigger jobs take longer, and we’ll tell you how long to expect.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
How much does sand mastic cost in Hounslow West?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Hounslow West and the rest of Greater London.
When will the new mastic be hard?
The surface skins quite quickly and it hardens fully over a longer time. Timing depends on the weather and the joint.