Greater London · England
Sand mastic for sash & case windows in Sipson, Greater London
Sand mastic in Sipson from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Window mastic to renew ahead of painting
- Crumbling sand mastic round a window
- Wind and rain getting in round a sash window
What sand mastic looks like in Sipson
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Osterley House (about 4.3 miles east) nearby, there’s older building stock in the area around Sipson 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.
As a London address, Sipson can be tricky for parking: let us know about parking bays, permits or a driveway. If you live in an older home near Christ Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Sipson is about 1 mile south-east of West Drayton, in Greater London. Anywhere in UB7, we cover sand mastic for homes and businesses. 764 places in Greater London are on our list, large and small. Our London page covers work nearby, about 15 miles away.
Every address in UB7 and UB3 is within our area for sand mastic. Local streets include East Road, Sipson Lane and Sipson Road, and we cover them all. If you’re just outside Sipson, we cover Harlington (1 mile south-east), Harmondsworth (1 mile south-west), Heathrow (2 miles south), Cranford (2 miles south-east) and Longford (2 miles south-west). Within a short drive, we also cover 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).
What’s near Sipson
We work in homes and buildings around Lake Farm Country Park, Harlington Community School and The Plough pub. The nearest railway station is West Drayton station, roughly 1.4 miles north-west of the centre. Nearby you’ll also find The Chimes (3.7 miles north) and Harlington (less than half a mile south). Not far away are Northala Fields and Crane Meadows.
Sand mastic in Sipson
Silicone on a period window often looks wrong and does not suit the building. Sand mastic is the traditional choice and we can swap the silicone for it. We work on period & listed homes, stone surrounds and tenement windows, and people most often call us about a silicone bead on a sash window that spoils the look 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.
Whatever the size of the job, it’s backed by our one-year guarantee in Sipson and across Greater London.
- Location
- Sipson (UB7, UB3)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Sipson
More services for Sipson
Work for landlords, hotels and businesses
If you manage several properties in or around Sipson, several properties can go on one quote. Just tell us the addresses and what each one needs.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Common problems we fix in Sipson
Timber swells and shrinks with the weather. The movement cracks the mastic little by little.
Signs it’s time to call us include:
- Gaps round a timber door in stone or brick
- Window mastic to renew ahead of painting
- Wind and rain getting in round a sash window
- A silicone bead on a sash window that spoils the look
For landlords with property near West Drayton station, older sash windows in a rental need their mastic kept sound to keep the weather out.
What your quote should include
- Whether you can choose the colour
- What insurance they hold
- When the joint can take water or movement
- Whether they seal over old material or remove it
Common questions in Sipson
I let a flat near West Drayton station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Is parking a problem for a job in Sipson?
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.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We’ll tell you what to expect for your job.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or send us an email.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Can I choose the sealant colour?
Most of the time, yes. We’ll explain which colours are available.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we’re using and why.
Do you work for hotels and businesses?
Yes. Larger jobs can be planned room by room or area by area.
What sealant work cannot fix
In fairness, there are a few things sealant won’t fix:
- Crumbling stone or brickwork round the window
- Sashes that rattle, stick or will not open
- Whether work needs listed building consent
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Surfaces we seal
- Sash and case windows
- Brick reveals
- Period & listed homes
- Timber door frames
- Stone surrounds
- Tenement windows
Surface by surface
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we’ll confirm access.
Looking after it afterwards
Aftercare is simple:
- Plan mastic work ahead of painting
- Ask the planning authority about consent for listed or conservation-area homes
- Take care around the mastic when scraping paint
- Make sure water runs off the sill
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- The old material and how stubborn it is
- Which sealant suits the joint
- When we can work, for business premises
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Any access issues, like height or stairs
- Photos by email, if that is easy
- Any previous sealing or DIY work
- Roughly how big the job is
Need a quote? Please ring 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before we start.
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours per window, depending on the condition of the joints. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
Getting a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.