Surrey · England
Sand Mastic in Horsell
Sand mastic for Horsell and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps round a timber door in stone or brick
- Silicone on a period window that looks wrong
- Draughts and rain around sash boxes
About our sand mastic in Horsell
We work across Horsell renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We work on tenement windows, period & listed homes and sash and case windows, and people most often call us about draughty sash windows at the surround and old sand mastic that has cracked, crumbled or fallen out.
Homes around Horsell range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Location
- Horsell (GU21, GU22)
- Region
- Surrey
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Windows and doors in Horsell
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Botleys Mansion (about 3.3 miles north) nearby, there’s older building stock in the area around Horsell as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Woking station, older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to Church of St Mary the Virgin include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like Woking High School? Then its window and door frames need their mastic kept sound, just like a home’s.
Horsell is about 1 mile north-east of Woking, in Surrey. Whether you’re in the middle of Horsell or further out, we cover sand mastic for every kind of property. Horsell is one of 395 towns and villages in Surrey we cover. For nearby work, see our Reading page (20 miles or so).
Postcode districts we cover here for sand mastic: GU21 and GU22. Sand mastic is available to properties on Elm Road, Heath Road and Popes Lane and the roads around them. Horsell is on the A3046, so it’s easy for us to get to. Close by, we work in Woking (1 mile south-west), Goldsworth Park (1 mile south-west), Mimbridge (1 mile north-west), Sheerwater (1 mile east) and St John's (2 miles south-west). Within a short drive, we also cover Guildford (6 miles south), Camberley (7 miles west), Epsom (13 miles east), Farnham (13 miles south-west), Ewell (13 miles east) and Egham (7 miles north).
Around Horsell
In Horsell, that means homes and buildings near The Horsell Village School, Milford Green and Coxhill Green and The Red Lion pub. For rail, the closest station is Woking station, about 0.7 miles south of the centre. Well-known places in the area include The Hockey Museum (0.7 miles south) and Woking Community Hospital (1 mile south). Open spaces near Horsell include Gracious Pond and Boldermere Lake.
Nearby places to Horsell
What else we do in Horsell
Landlords, agents and businesses in Horsell
We also work for property managers and facilities teams in Horsell and across Surrey. Several sites can be quoted together, and we’re fully insured.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Common questions in Horsell
Will you come out to Horsell?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do sand mastic in Horsell?
Yes. We work across London and the South East, and Horsell is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
What does sand mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or email us with a short description of the job.
Do you work for letting agents?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels in Horsell.
Can I choose the sealant colour?
We help you choose a colour that suits. The choice depends on the product the joint needs.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
When it is not the sealant
We will always be straight with you, so here’s what sealant can’t fix:
- Masonry that needs repairing
- Putty and glazing repairs
- Decisions on consent for listed homes
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Timber door frames
- Period & listed homes
- Tenement windows
- Sash and case windows
- Stone surrounds
- Brick reveals
Why it’s worth doing now in Horsell
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. In an older home around Horsell, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why Horsell clients choose us
- ARBOMaster approved applicator
- Homes, businesses and hotels
- One-year guarantee on every job
- 180+ five-star Google reviews
Take a look at what affects the cost or our reviews.
What the job involves on each surface
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
The process
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours per window, depending on the condition of the joints. Parking around Horsell is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Advice
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Don’t run silicone over sand mastic
- Get any rot dealt with first
- Clear gutters so water does not pour onto the windows
- Don’t paint over the new mastic
Leave the new mastic unpainted, as traditional guidance advises. Ask us before any decorating around it.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.