Surrey · England
Window Mastic in Ashtead
We cover Ashtead for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- White mastic on grey or black frames
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
What affects the cost of window mastic
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- When we can work, for business premises
- The type of sealant required
- Any mould that needs treating
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Asking for a quote
When you call or email, it’s useful to know:
- Photos by email, if that’s easy
- Roughly how big the job is
- The problem you’ve noticed
- The type of property
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
Window mastic for homes and businesses in Ashtead
From a single sill to a whole house of windows, the work is priced before anything is done. To get one, phone 0345 464 0079 or send us an email with the number of frames and any access details. We work on window sills, uPVC windows and timber windows & doors, and common reasons people get in touch are gaps where the sill meets the wall and gaps left after new windows were fitted.
Around Ashtead, many houses have gained conservatories, French doors or replacement windows over time. Every addition brings more joints, each wearing at its own pace. Leaks usually start at a sill, a frame head or a glazing joint.
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.
- Location
- Ashtead (KT21, KT22)
- Region
- Surrey
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
Resealing frames is a short job: the visit takes most of a day for a typical house, less for a few frames. Leave it until water is coming in and you may need plastering and decorating as well. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and early is when they’re cheapest and quickest to sort.
Combining jobs into one visit is normally more efficient than separate visits. You’ll get one clear quote for the whole job.
Why us?
- 180+ five-star Google reviews
- Sealant colour chosen to suit
- Over 20 years’ experience
- Neat joints and a tidy finish
Take a look at how sealant jobs are priced and our reviews.
Ashtead homes and the weather
With historic houses such as Fitznells Manor (about 3.7 miles north-east) nearby, there’s older building stock in the area around Ashtead 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Parsons Mead School, the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near St George's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Ashtead is about 2 miles south-west of Epsom, in Surrey. Every kind of property in Ashtead can book us for window mastic. Every job comes with our 12-month guarantee. Our area takes in 395 places across Surrey, from the larger towns to small villages. For nearby work, see our Crawley page (15 miles or so).
Our applicators cover all of the KT21 and KT22 postcode area for window mastic. That includes homes and businesses on The Street, Church Road and Greville Park Road. If you’re just outside Ashtead, we cover Pachesham Park (2 miles north-west), Malden Rushett (2 miles north), Oxshott (3 miles north-west), Barwell (3 miles north) and Stoke D'Abernon (4 miles west). Larger places within reach include Guildford (12 miles west), Woking (12 miles west), Horley (11 miles south-east), Redhill (8 miles south-east), Ewell (4 miles north-east) and Egham (13 miles north-west).
Around Ashtead
Typical jobs here are in homes near Ashtead Park, Barnett Wood Infant School and St Andrew's Catholic School, among other places. Ashtead’s nearest station is Ashtead station, roughly 0.6 miles north. A little further out are Headley Court (1.7 miles south-east) and Walton on the Hill (3.1 miles south-east). Open spaces near Ashtead include Box Hill and The Lake.
What the job involves on each surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
Composite doors
A composite door usually sits in a plastic outer frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
Do you need window mastic in Ashtead?
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Most people get in touch after spotting one of these:
- Cold air getting in at the frame edge
- Gaps where the sill meets the wall
- Old mastic that has gone black or come away
- Gaps between the frame and the inside reveal
Letting a property close to Ashtead station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Questions to ask before booking
- How the surfaces are prepared before sealing
- The length of the guarantee
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Use gentle cleaners on frames and sealant
- Avoid harsh chemicals near the mastic
- Wipe condensation off the frames
- Keep paint and stain on wooden frames in good order
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Towns and villages near Ashtead
Also in Ashtead
Honest limits
Before booking, it’s worth knowing the limits too:
- Rotten timber, which needs a joiner first
- A door that needs adjusting, rehanging or new seals
- A sash or casement that won’t close properly
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before you book.
What we seal
- Window sills
- Aluminium frames
- Timber windows & doors
- Composite doors
- Patio & French doors
- uPVC windows
Questions from Ashtead
Is Ashtead in your area for window mastic?
Yes, Ashtead is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Ashtead station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Where do you work from?
Our base is Crawley. We work across South East England, London and Scotland.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
How long will my window job take?
A few frames take a few hours. We confirm the timing with your quote.
Are you fully insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Is the new sealant paintable?
Not normally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What we do, step by step
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from an hour or two to a full day, depending on how many frames there are. Parking in a town like Ashtead is generally straightforward, but tell us if there’s a driveway or any restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- 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.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
Get a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.