Surrey · England
West Horsley Window Mastic
Window mastic for West Horsley, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Black, perished sealant on frames
- Cold air getting in at the frame edge
- Damp patches on the reveal after heavy rain
How it works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours for a few frames, or a day or more for a whole house. Parking around West Horsley 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.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
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 pictures if that is easy.
Advice
Window mastic for homes and businesses in West Horsley
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. We work on uPVC windows, aluminium frames and patio & French doors, and people most often call us about gaps left after new windows were fitted and cracked internal joints between frame and plaster.
In smaller places like West Horsley, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
You are covered for a year from the day we finish. If anything is not right with it, phone 0345 464 0079 or email us.
- Place
- West Horsley (KT24, GU23)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in West Horsley
The quote reflects the job in front of us. We look at:
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- The type of sealant required
- When we can work, for business premises
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
What to tell us for a quote
To help us quote quickly, please include:
- Whether it’s a home or a business
- What’s wrong with the joints now
- Whether it has been sealed before
- How we’d reach the joints
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before work begins.
What window mastic looks like in West Horsley
With historic houses such as Hatchlands Park (about 1.6 miles south-west) nearby, there’s older building stock in the area around West Horsley as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of St Mary the Virgin, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Schools such as The Raleigh School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
West Horsley is about 6 miles west of Leatherhead, in Surrey. We carry out window mastic for householders, landlords and businesses in West Horsley and nearby, as part of our work across Surrey. Our Surrey coverage runs to 395 places, and West Horsley is one of them. Our Crawley page covers work nearby, about 16 miles away.
Every address in KT24 and GU23 is covered for window mastic, from the main roads to the quietest streets. Streets in the area include The Street, Woodside and Long Reach, all of which we cover. You will find West Horsley on the A246 and B2039, which makes it straightforward to reach with everything needed for window mastic. Nearby, we also carry out window mastic in East Horsley (1 mile east), Ockham (2 miles north), East Clandon (2 miles south-west), Effingham (2 miles east) and Ripley (3 miles north-west). Further out, we also cover Guildford (6 miles west), Woking (6 miles north-west), Camberley (13 miles west), Epsom (9 miles north-east), Horley (14 miles south-east) and Redhill (13 miles east).
Landmarks near West Horsley
Typical jobs here are in homes near Howard of Effingham School, The Barley Mow pub and The Forest and the Highlands and the streets around them. West Horsley’s nearest station is Horsley station, roughly 0.7 miles east of the centre. A little further out are Woking Community Hospital (5.2 miles north-west) and Send and Ripley History Society Museum (2.4 miles north-west). Not far away are St Martha's Hill and Papercourt Marshes.
How to look after the new joints
Aftercare is simple:
- Paint up to the joint, not over it
- Keep solvents and bleach off the sealant
- Don’t aim a pressure washer at the joints
- Repaint timber before it’s bare
Silicone can’t usually be painted, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Leaks generally show up in wet, windy weather, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Different surfaces, different methods
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Also near West Horsley
What else we do in West Horsley
When to call us in West Horsley
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that can’t keep up eventually tears.
Keep an eye out for these signs:
- Mastic that’s falling out in pieces
- Gaps where the sill meets the wall
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
Letting a property close to Horsley station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
What to look for in a quote
- What insurance they hold
- The length of the guarantee
- Whether all the old sealant comes out first
- Whether VAT is included
When something else is needed
Before booking, it’s worth knowing the limits:
- Damp coming through the wall itself rather than the frame joint
- A door that needs adjusting, rehanging or new seals
- Rotten timber, which needs a joiner first
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Aluminium frames
- uPVC windows
- Window sills
- Composite doors
- Patio & French doors
- Timber windows & doors
Leave it or put it right?
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. Problems with the glass or gaskets are for a window company, and we will say so. In a smaller place like West Horsley, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
No two jobs are quite the same, so each one gets its own quote. 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 us?
- Domestic, commercial and hotel work
- We agree the colour with you first
- 20+ years of sealant experience
- Rated 4.9 stars on Google
Common questions in West Horsley
Do you cover smaller places like West Horsley?
Yes, West Horsley is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is West Horsley in your area for window mastic?
Yes, West Horsley is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Can you do the inside joint as well?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly, using a paintable sealant if you want to decorate.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.