Greater London · England
Sand mastic for sash & case windows in Yiewsley, Greater London
We cover Yiewsley for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Gaps round a timber door in stone or brick
- Draughty sash windows at the surround
- Mastic worn away on windows facing the weather
What affects the quote in Yiewsley
Some jobs are bigger than they look, and some smaller. The main factors:
- The number of rooms or windows
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- The rough size of the job
- Photos by email, if that is easy
- The problem you’ve noticed
- Whether it has been sealed before
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Sand mastic in Yiewsley
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We work on brick reveals, tenement windows and stone surrounds, and the jobs we see most are draughty sash windows at the surround and patchy fillers round a sash window.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, which is when draughts and damp patches appear in homes in Yiewsley.
You get a one-year guarantee, the same in Yiewsley as everywhere else we work.
- Location
- Yiewsley (UB5, UB4, UB1)
- Wider area
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
In hotels, rooms out of use cost money, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
Nearby places to Yiewsley
What else we do in Yiewsley
Sand mastic in Yiewsley: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In a converted house or block, who looks after the windows depends on the lease, so check that before you book.
Homes close to St Joseph the Worker & Dovetail Centre include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Rented homes near Southall station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Yiewsley is about 2 miles north-east of Hayes, in Greater London. Jobs in Yiewsley get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Yiewsley is one of 764 towns and villages in Greater London we cover for sand mastic. You can also see our page for London, roughly 13 miles from Yiewsley.
Postcode districts we cover here for sand mastic: UB5, UB4 and UB1. Sand mastic is available to properties on Owen Road, Friar Road and Maple Road. If you’re just outside Yiewsley, we cover Yeading (1 mile north), Dormers Wells (2 miles south-east), Northolt (2 miles north-east), Southall (2 miles south) and South Ruislip (2 miles north). Further out, we also cover London (13 miles east), City of Westminster (10 miles east), Marylebone (11 miles east), Kensington (8 miles east), St Pancras (12 miles east) and Shoreditch (13 miles east).
Around Yiewsley
Typical jobs here are in homes near White Hart Public House, Northala Fields and Barnhill Community High School, among other places. For rail, the closest station is Southall station, roughly 1.8 miles south of the centre. A little further out are Hayes Cottage Hospital (1.5 miles south-west) and The Chimes (3.8 miles west). Green spaces nearby include Northala Fields and Yeading Brook Meadows.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Why deal with it now?
New mastic over crumbling mastic won’t hold. Raking out and preparing the joint gives it a sound base so the new mastic stays put. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before we start.
Why us?
- We never seal over old sealant
- A 12-month guarantee on all work
- 4.9 on Google from 180+ five-star reviews
- Domestic, commercial and hotel work
See our cost guide or our reviews.
Common problems we fix in Yiewsley
Water gets into small cracks in the mastic and loosens it further. Exposed elevations usually fail first.
Any of these means the joints need attention:
- Mastic worn away on windows facing the weather
- Wind and rain getting in round a sash window
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
As a London address, Yiewsley can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- Is the old sealant removed completely?
- Are they insured?
- How the surfaces are prepared before sealing
- When the joint can take water or movement
Your questions about sand mastic in Yiewsley
Is Yiewsley in your area for sand mastic?
Yes, Yiewsley is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Is parking an issue for sand mastic in Yiewsley?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
What should I tell you?
A short description and the location. If we need more, we will ask.
How much does sand mastic cost in Yiewsley?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or email us with a short description of the job.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Do you have insurance?
Yes, we’re fully insured.
Different surfaces, different methods
Stone surrounds
Stone openings are rarely perfectly straight, so the gap is not the same all the way round. We shape it by hand to follow the stone.
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for a single window, longer for several. In Yiewsley, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- 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.
How to prepare
- Let us know about stairs, lifts or work at height
- Mention any parking rules near the property
- Clear items away from the joints we’re working on
How to get a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.