Surrey · England
Sand Mastic in Dorking
Professional sand mastic in and around Dorking, with old sealant always removed completely and a 12-month guarantee.
- Old sand mastic that has cracked, crumbled or fallen out
- Window mastic to renew ahead of painting
- Wind and rain getting in round a sash window
Landlords, agents and businesses in Dorking
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents and landlords in Dorking can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Sand mastic in Dorking, done properly
Sand mastic does not last for ever and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. Common call-outs are for crumbling sand mastic round a window and wind and rain getting in round a sash window, across period & listed homes, stone surrounds and tenement windows.
In a town like Dorking, older houses sit alongside newer estates, with windows of every age. All of them depend on a sound bead of mastic between frame and wall.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Where
- Dorking (RH4, RH5)
- Wider area
- Surrey
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you’ve already had a go yourself, that is fine. We cut it out and start again.
How the job changes by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Why act early in Dorking
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. 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.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Why Dorking customers choose us
- More than 20 years in sealant work
- A 12-month guarantee on all work
- Quality sealants from Arbo and Everbuild
- An ARBOMaster approved applicator
Read how sealant jobs are priced and our reviews.
Signs you need sand mastic in Dorking
Over the years, sand mastic weathers. It dries out, cracks and loses its grip on the stone or timber.
People normally contact us when they notice one of these:
- Mastic round period door frames that has failed
- Gaps where the frame meets the masonry
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
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 happens if the job turns out different
- How the joint is cleaned and prepared
- Who turns up on the day
- What insurance they hold
Frames and glazing around Dorking
Historic houses like Polesden Lacey (about 2.7 miles north-west) are a reminder that the area around Dorking has older buildings as well as new. 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Paul, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For landlords with property near Dorking Deepdene station, any sash windows need sound mastic to keep draughts and rain out.
Dorking is about 10 miles north-west of Crawley, in Surrey. Dorking gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Surrey, we cover 395 places, and Dorking is one of them. Our Crawley page covers work nearby, about 10 miles away.
All of RH4 and RH5 is covered for sand mastic. Streets in the area include High Street, Station Road and London Road. Main roads around Dorking include the A24 and A25. 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). Larger places within reach include 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. Other local landmarks include 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. Other landmarks nearby include Mesolithic Museum (3.9 miles south-west) and Headley Court (4.8 miles north-east). Open spaces near Dorking include Reigate Heath and Box Hill.
What happens on the day
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. We protect the surfaces around the joints before work begins. The work usually takes a few hours for a single window, longer for several. Parking in a town like Dorking is usually 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 the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
Get a quote
If you’re in Dorking and need sand mastic, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
Towns and villages near Dorking
More services for Dorking
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- How many areas need sealing
- Any mould that needs treating
- Access and height
- How much old sealant there is and how hard it is to remove
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Asking for a quote
When you call or email, it’s useful to know:
- Where the property is
- A few photos by email, if you can
- Whether it’s a home or a business
- Whether it has been sealed before
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or email us and describe the job.
Questions from Dorking
Is there a guarantee on sand 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.
I let a flat near Dorking Deepdene station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Do you cover Dorking?
Yes. We are based in Crawley and work across South East England, London and Scotland, Dorking included.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Is there any odour?
Some sealants have a smell while they cure. Ventilation helps.
Where do you work from?
We work from Crawley. Our applicators cover Dorking, along with the rest of our area.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.