Surrey · England
Window & door mastic in Horsell, Surrey
Professional window mastic in and around Horsell, with old sealant always removed completely.
- Rain getting in at the frame or under the sill
- A bead that does not match the frame
- Old mastic that has gone black or come away
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Keep timber frames painted
- Walk round the house once a year and look at the joints
- Keep drainage slots and sill grooves clear
- Clean frames with a soft cloth and soapy water
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
Window mastic in Horsell
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that cannot flex, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We work on window sills, aluminium frames and patio & French doors, and common reasons people get in touch are gaps left after new windows were fitted and cracked internal joints between frame and plaster.
Many houses in smaller places like Horsell have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
Big or small, you get the same 12-month guarantee.
- Location
- Horsell (GU21, GU22)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
If you manage several properties in or around Horsell, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
What affects the cost of window mastic
Every job gets its own quote. This is what makes a difference:
- How many areas need sealing
- Working hours on commercial sites
- The type of sealant required
- How easy the joints are to reach
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Asking for a quote
When you call or email, it’s useful to know:
- The problem you’ve noticed
- Roughly how big the job is
- Access, such as stairs, a lift or height
- Where the property is
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.
What the job involves on each surface
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
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. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
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.
Nearby places to Horsell
More services for Horsell
What we cannot put right
In fairness, some problems need a different trade:
- Worn gaskets, brush seals or a door that has dropped
- Misting between the panes of a double-glazed unit (that needs a new unit)
- A sash or casement that will not close properly
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Aluminium frames
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Composite doors
- Window sills
Common questions in Horsell
Do you cover Horsell for window mastic?
Yes. We work across London and the South East, and Horsell is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
I let a flat near Woking station. Can you help?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Where do you work from?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Will the old sealant be removed?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Does the work come with a guarantee?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
How do I get a quote for window mastic in Horsell?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Will new mastic stop draughts?
Yes, where the draught is at the frame edge. We check where the draught is before work begins.
Do you have sealant for grey or black windows?
Generally, yes. Tell us the frame colour when you get in touch and we will match it as closely as we can.
How it works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a morning for a couple of windows and a door. Parking around Horsell is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Mention if the joints have been sealed before
- Let us know about parking restrictions
Ask for a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved and give you a clear price.
Related advice
Windows and doors in Horsell
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. 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. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you live in an older home near Church of St Mary the Virgin, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you let a flat or house near Woking station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. 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. Wherever you are in the GU21 postcode area, our applicators can take on window mastic. We cover 395 towns and villages across Surrey. You can also see our page for Reading, about 20 miles away.
We work across GU21 and GU22 for window mastic and the streets around it. Whether your property is on Elm Road, Heath Road and Popes Lane or anywhere close by, we can help. You’ll find Horsell on the A3046, which makes it straightforward to reach. Neighbouring places we cover for window mastic include 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).
Near you in Horsell
We work in homes and buildings around The Horsell Village School, Milford Green and Coxhill Green and The Red Lion pub. The closest station to Horsell is Woking station, about 0.7 miles south. Other landmarks nearby include The Hockey Museum (0.7 miles south) and Woking Community Hospital (1 mile south). The countryside around Horsell includes Gracious Pond and Boldermere Lake.