Surrey · England
Window Mastic in Dorking
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Dorking. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked sealant at the sill ends
- Gaps between the frame and the inside reveal
- Untidy mastic left by window fitters
Aftercare tips
A little care helps the new joints last. We recommend:
- Ventilate rooms so frames don’t stay wet inside
- Do not aim a pressure washer at the joints
- Make sure the drainage slots aren’t blocked
- Keep paint off silicone joints
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
About our window mastic in Dorking
The new joint doesn’t have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. We work on patio & French doors, aluminium frames and composite doors, and the jobs we see most are draughts coming in around windows and doors and untidy mastic left by window fitters.
In a town like Dorking, the windows on the most exposed side of a house take the brunt of the rain, and that’s normally where the sealant gives up first. Checking every frame, not just the obvious one, is time well spent.
All our work comes with a one-year guarantee.
- Location
- Dorking (RH4, RH5)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need window mastic in Dorking
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
These are the problems we’re asked about most:
- Hard, cracked sealant around windows
- White mastic on grey or black frames
- Black, perished sealant on frames
- Gaps between the frame and the inside reveal
Managing a site like St Paul's CofE (Aided) Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- What insurance they hold
- What happens if they find a problem under the old sealant
- Is VAT in the price?
- What product goes in the joint
What window mastic looks like in Dorking
With historic houses such as Polesden Lacey (about 2.7 miles north-west) nearby, there’s older building stock in the area around Dorking 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. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Dorking Deepdene station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. For an older house near a landmark such as Church of St Paul, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Dorking is about 10 miles north-west of Crawley, in Surrey. For window mastic in and around Dorking, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We’re based in Crawley and cover Surrey. We cover 395 towns and villages across Surrey, from the larger towns to small villages. For nearby work, see our Crawley page, about 10 miles away.
Our applicators cover all of the RH4 and RH5 postcode area for window mastic. If you need window mastic at a property on High Street, Station Road and London Road or anywhere close by, our applicators can take on the job. Being close to the A24 and A25, Dorking is simple for us to get to. Close by, we work in Pixham (1 mile north-east), North Holmwood (1 mile south), Westhumble (2 miles north), Westcott (2 miles west) and Blackbrook (2 miles south-east). Further out, we also cover Guildford (11 miles west), Woking (12 miles north-west), Epsom (8 miles north), Horley (8 miles south-east), Redhill (7 miles east) and Ewell (9 miles north).
What’s near Dorking
Locally, jobs take us to homes and businesses close to The Wheatsheaf Public House, The Ashcombe School and Deepdene Terrace, among other places. Nearby too are The Ashcombe School (0.6 miles north) and Pippbrook House (0.5 miles north). The nearest railway station is Dorking Deepdene station, roughly 0.6 miles north. A little further out are Mesolithic Museum (3.9 miles south-west) and Headley Court (4.8 miles north-east). Not far away are Reigate Heath and Box Hill.
What happens on the day
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. It generally takes a few hours for a few frames, or a day or more for a whole house. A visit in Dorking needs access to the work and a place to park close by. For outside work, let us know about side access, gates and any upper-floor joints.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- 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.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
Get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll take it from there.
Related advice
Dorking questions
Is there a guarantee on window mastic in Dorking?
All our work, in Dorking and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do you work for landlords with property near Dorking Deepdene station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Can you reach windows above the ground floor?
Generally, yes. We plan safe access before the job, so mention the height and anything in the way.
Is it OK to seal over old sealant?
No. The old sealant always comes out first.
What does window mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we will talk you through it.
Do you have sealant for grey or black windows?
Yes, in most cases. Tell us the frame colour when you get in touch and we’ll match it as closely as we can.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Where do you work from?
Our base is Crawley. We work across South East England, London and Scotland.
Honest limits
It helps to know what we cannot do:
- Damp problems in the wall away from the window
- Misting between the panes of a double-glazed unit (that needs a new unit)
- A frame that has rotted at the joint
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Where we work in Dorking
- Timber windows & doors
- Aluminium frames
- Composite doors
- uPVC windows
- Window sills
- Patio & French doors
More services for Dorking
Quotes for window mastic in Dorking
Jobs vary more than people expect. What affects the quote:
- Any mould that needs treating
- The size of the job
- Whether the work is at height
- How many areas need sealing
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Any previous sealing or DIY work
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Different surfaces, different methods
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
uPVC windows
We clean the frame edge carefully so the plastic isn’t marked, then the new bead is laid against the frame and the wall.