Surrey · England
Window & door mastic in Westcott, Surrey
Problem with your window and door frames in Westcott? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Cracked or shrunken mastic around the frame
- Black, perished sealant on frames
- Gaps where the sill meets the wall
Window mastic in Westcott
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that can’t flex, so deep gaps get backing rod first. The sealant then grips the two sides it should. Common call-outs are for cracked internal joints between frame and plaster and mastic that’s falling out in pieces, across window sills, timber windows & doors and composite doors.
Around Westcott, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Whatever the size of the job, it’s backed by our one-year guarantee in Westcott and across Surrey.
- Where
- Westcott (RH4)
- Region
- Surrey
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Aftercare tips
A little care helps the new joints last. Our advice:
- Do not paint over the silicone
- Wash the frames with mild soapy water
- Repaint timber before it’s bare
- Don’t use solvent cleaners on the joint
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on 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.
Windows and doors in Westcott
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. With historic houses such as Polesden Lacey (about 2.2 miles north) nearby, there’s older building stock in the area around Westcott as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Dorking West station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Schools such as Surrey Hills All Saints Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Westcott is about 2 miles west of Dorking, in Surrey. Westcott gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Across Surrey, we cover 395 places, and Westcott is one of them. We also work in Crawley, about 11 miles from Westcott.
Our applicators cover all of RH4 for window mastic. Whether your property is on Guildford Road, Chapel Lane and Stones Lane or anywhere close by, we can help. We also cover Ranmore Common (1 mile north), Wotton (1 mile south-west), Dorking (2 miles east), North Holmwood (2 miles south-east) and Mid Holmwood (2 miles south-east). Larger places within reach include Guildford (9 miles west), Woking (11 miles north-west), Epsom (9 miles north-east), Horley (9 miles east), Redhill (9 miles east) and Ewell (10 miles north-east).
Around Westcott
We work in homes and buildings around The Priory CofE Voluntary Aided School, Milton Heath and The Nower and Pippbrook House, among other places. Westcott’s nearest station is Dorking West station, about 1.4 miles north-east. Other landmarks nearby include Headley Court (6 miles north-east) and Mesolithic Museum (2.4 miles south-west). For a walk, there’s Combe Bottom and Box Hill.
Why deal with it now?
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly. Where a wall is exposed, as many are in small places like Westcott, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or email us and we will talk you through it.
Why book with us
- Trusted Arbo and Everbuild sealants
- Neat joints and a tidy finish
- Colour agreed with you before any work starts
- 4.9 on Google from 180+ five-star reviews
Take a look at what affects the cost and what customers say.
What happens on the day
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes most of a day for a typical house, less for a few frames. For a village or hamlet like Westcott, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Clear items away from the joints we are working on
- Let us know if you’ve seen damp or leaks
How to get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Common questions in Westcott
Can you do window mastic in Westcott?
Yes. Our work covers London and the South East, and Westcott is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Do you cover smaller places like Westcott?
Yes, Westcott is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can landlords and businesses book you?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Can resealing stop a draught around my window?
Often, yes. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Places near Westcott
More services for Westcott
Honest limits
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Soft or decayed wood in the frame
- A sash or casement that will not close properly
- Damp problems in the wall away from the window
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before booking.
Where we work in Westcott
- uPVC windows
- Window sills
- Aluminium frames
- Composite doors
- Timber windows & doors
- Patio & French doors
What we’re called out for in Westcott
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
It’s worth asking for a quote if you see:
- White mastic on grey or black frames
- Gaps where the sill meets the wall
- Mastic that has split away from the wall
- Draughty joints inside around the window
For an older house near a landmark such as St John's Community Hall, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- What insurance they hold
- How the surfaces are prepared before sealing
- What guarantee comes with the work
- Which sealant they’ll use, and why
What affects the cost of window mastic
You’ll get a clear quote before any work starts. It’s based on:
- Any working-time requirements on site
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- The product the joint needs
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and send you a clear quote before we start.
Asking for a quote
Before you ask for a quote, have a think about:
- Access, such as stairs, a lift or height
- The address or postcode of the job
- If someone has resealed it before
- The problem you’ve noticed
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To get started, call 0345 464 0079 or email us.