Greater London · England
Hillingdon Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Hillingdon. Fully insured, ARBOMaster approved and guaranteed for a year.
- Window mastic to renew ahead of painting
- Crumbling sand mastic round a window
- Weathered mastic on the most exposed windows
Surface by surface
Period and listed homes
A traditional finish suits a period property.
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Sand mastic in Hillingdon
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. We are often asked to deal with weathered mastic on the most exposed windows and silicone on a period window that looks wrong, on period & listed homes, sash and case windows and tenement windows.
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 Hillingdon.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or drop us an email.
- Place
- Hillingdon (UB10, UB8, UB9, HA4)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What sand mastic looks like in Hillingdon
With historic houses such as Ickenham Hall (about 1.8 miles north) nearby, there’s older building stock in the area around Hillingdon as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St John, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Hillingdon is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Hillingdon is about 2 miles north-west of Hayes, in Greater London. Homes, rented property, offices and hotels in Hillingdon is covered for sand mastic. The work is guaranteed for a year. Hillingdon is one of 764 towns and villages in Greater London where we work for sand mastic. For nearby work, see our London page (15 miles or so).
We cover every part of UB10, UB8, UB9 and HA4 for sand mastic and the streets around it. That includes homes and businesses on The Larches, Brampton Road and Clifton Gardens. Main roads around Hillingdon include the B465 and B467, so getting to you is simple. Neighbouring places we cover for sand mastic include Uxbridge (1 mile west), Ickenham (1 mile north), Cowley (2 miles south-west), Yiewsley (2 miles south-west) and Hayes (2 miles south-east). We also work in nearby towns such as London (15 miles east), City of Westminster (13 miles east), Marylebone (13 miles east), Kensington (11 miles east), St Pancras (14 miles east) and Hampstead (12 miles east).
Landmarks near Hillingdon
Typical jobs here are in homes near Highfield Primary School, Norman Leddy Memorial Gardens and Oak Wood School and the streets around them. Hillingdon’s nearest station is West Drayton station, roughly 2.2 miles south-west of the centre. Nearby you’ll also find Hillingdon Museum and Archives Services (1.4 miles north-west) and Hillingdon Hospital (1 mile south-west). The countryside around Hillingdon includes Northala Fields and Gutteridge Wood and Meadows.
Do you need sand mastic in Hillingdon?
Some old mastic was never deep enough. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
If you can see any of these, it’s time to have the joints looked at:
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Gaps between timber frames and stone or brick
- Weathered mastic on the most exposed windows
If you look after a building such as Abbotsfield School for Boys, the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Whether all the old sealant comes out first
- Whether you can choose the colour
- How the joint is cleaned and prepared
- Who turns up on the day
How it works
The work is kept neat and contained to the joints we are treating, so you can get on with your day. The job usually takes a few hours per window, depending on the condition of the joints, and we explain the cure time before we leave. In Hillingdon, 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.
- The joint is raked out and cleaned.
- 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
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
Advice
What else we do in Hillingdon
Your questions about sand mastic in Hillingdon
I let a flat near West Drayton station. Can you help?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Is parking a problem for a job in Hillingdon?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Should I check with the council before work on a listed or conservation-area home?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.
Is sand mastic better than silicone for my windows?
That depends on your windows. On many period windows, sand mastic looks right and suits the building and newer frames generally get a flexible sealant.
Can old silicone round a sash window be swapped for sand mastic?
Normally, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Do you guarantee sand mastic work?
Our 12-month guarantee covers every job.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
Letting agents and landlords in Hillingdon can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Aftercare tips
To keep the joints looking good and working properly:
- Make sure water runs off the sill
- Sort the mastic before the decorators arrive
- Find out about consent before window work on a listed home
- Don’t run silicone over sand mastic
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
DIY versus a professional finish
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.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Honest limits
Before booking, it’s worth knowing the limits too:
- Whether work needs listed building consent
- Putty and glazing repairs
- Sashes that rattle, stick or will not open
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Where we work in Hillingdon
- Timber door frames
- Brick reveals
- Stone surrounds
- Period & listed homes
- Tenement windows
- Sash and case windows