Surrey · England
Window Mastic in Westborough
Window mastic for Westborough, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Leaking joints at the ends of sills
- Cracked or shrunken mastic around the frame
- Rushed sealant from a window installation
When it is not the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Broken hinges, locks or handles
- Soft or decayed wood in the frame
- Damp coming through the wall itself rather than the frame joint
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer before you book.
Surfaces we seal
- Aluminium frames
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Window sills
- Composite doors
How we handle window mastic in Westborough
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through. If the draught is through the window seals instead, we will tell you. We work on aluminium frames, composite doors and window sills, and the jobs we see most are cracked internal joints between frame and plaster and whistling draughts around closed windows.
Many houses in smaller places like Westborough 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.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Westborough (GU2, GU1, GU3)
- Region
- Surrey
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Westborough
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What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take most of a day for a typical house, less for a few frames. Parking around Westborough is normally 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.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
- For business premises, tell us about site rules or sign-in
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.
Related advice
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What window mastic looks like in Westborough
London and the South East are among 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 Guildford Castle (about 1.4 miles south-east) nearby, there’s older building stock in the area around Westborough as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Rented homes near Guildford station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. If you look after a building such as St Joseph's Catholic Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Westborough is about 1 mile west of Guildford, in Surrey. Our applicators cover window mastic for homes and businesses in Westborough and nearby, as part of our work across Surrey. Our Surrey coverage runs to 395 places, and Westborough is one of them. There’s also a page for Crawley, about 20 miles away.
We cover every part of GU2, GU1 and GU3 for window mastic. If you need window mastic at a property on Cabell Road, Clover Road and Weston Road or anywhere close by, our applicators can take on the job. You will find Westborough on the A323, which makes it straightforward to reach. Nearby, we also carry out window mastic in Stoughton (1 mile north), Bellfields (1 mile north-east), Guildford (1 mile east), Abbotswood (2 miles east) and Jacobs Well (2 miles north-east). We also work in nearby towns such as Woking (5 miles north), Camberley (8 miles north-west), Farnham (9 miles west), Egham (13 miles north), Walton-on-Thames (13 miles north-east) and Dorking (12 miles east).
Around Westborough
Locally, jobs take us to homes and businesses close to Kings College Guildford, Broadstreet and Hare and Hounds pub, among other places. The closest station to Westborough is Guildford station, roughly 1 mile south-east. A little further out are Royal Surrey County Hospital (0.6 miles south-west) and Guildford Cathedral Treasury (0.5 miles south-east). Green spaces nearby include Littlefield Common and Pewley Hill.
Why it’s worth doing now in Westborough
Running fresh sealant over the old joint is tempting, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In an older home around Westborough, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us.
What you get with us
- You choose the colour before work begins
- Tidy, careful work
- Approved under the ARBOMaster scheme
- Colour picked to suit the job
See our cost guide or customer reviews.
FAQs for Westborough
Can you do window mastic in Westborough?
Yes. Our work covers London and the South East, and Westborough is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Do you work for landlords with property near Guildford station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Do you seal inside as well as outside?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
Can you quote for more than one area?
Yes. Just list everything you need.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
How do I get a quote for window mastic in Westborough?
Size, access and the old material all affect the cost. Call for a quick quote.
Do you work on first-floor windows?
Normally, yes. We plan safe access before the job.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Keep timber frames painted
- Wipe condensation off the frames
- Avoid harsh chemicals near the mastic
- Keep jet washers away from the mastic
Most silicone sealants won’t take paint, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
How we quote for window mastic
For a quick quote, just ask. The main things that affect it are:
- How many areas need sealing
- Access and height
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
What to tell us for a quote
To make quoting easier, let us know:
- A few pictures by email, if you can
- Roughly how big the job is
- Whether it has been sealed before
- The problem you’ve noticed
We do not publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Do you need window mastic in Westborough?
Sun, frost and rain wear sealant out. Sunlight dries the surface out, until it loses its stretch and starts to crack.
The problems people usually mention when they call include:
- Rushed sealant from a window installation
- Draughts coming in around windows and doors
- Damp patches on the reveal after heavy rain
- White mastic on grey or black frames
For an older house near a landmark such as St Francis Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- Is VAT in the price?
- Whether you can choose the colour
- Is the old sealant removed completely?
- When the joint can take water or movement