Surrey · England
External Mastic in Gomshall
Professional external mastic in and around Gomshall, with old sealant always removed completely.
- Sealant that has lost its bond to the brick or render
- Movement joints filled with mortar instead of sealant
- Movement joints with cracked, split or missing sealant
External mastic in Gomshall
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. If you have sealant that has lost its bond to the brick or render and movement joints filled with mortar instead of sealant, we can put it right, on façade panels, concrete & block and joints between brick and frames alike.
Older homes in small places like Gomshall may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Gomshall (GU5)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Gomshall
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
These are the problems we’re asked about most:
- Rain getting behind render or cladding at a joint
- Brick movement joints where the sealant has split
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
For site and facilities teams at buildings such as Shere CofE Aided Infant School, its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- How the joint is cleaned and prepared
- What guarantee comes with the work
- How long to leave it before use
- What the quote includes, VAT included or not
Why it’s worth doing now in Gomshall
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost, so the problem grows beyond the joint itself. Older cottages and farmhouses around Gomshall can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why Gomshall clients choose us
- White, clear, grey or another colour, product permitting
- Quality sealants from Arbo and Everbuild
- Every job guaranteed for a year
- Sanitary silicone with an anti-fungal additive in wet areas
See what affects the cost and what customers say.
How the visit works
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work begins. The work usually takes anything from a few hours to several days, depending on the building. Somewhere as small as Gomshall, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
Get a quote
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job.
Advice
Also near Gomshall
What else we do in Gomshall
Outside joints around Gomshall
Historic houses like Hatchlands Park (about 2.9 miles north) are a reminder that the area around Gomshall has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Gomshall station? Then split movement joints are easy to miss on a rental until damp shows inside. In the older streets around The Church of St James, an extension built onto an older house moves differently, and the joint between them takes the strain.
Gomshall is about 5 miles west of Dorking, in Surrey. Jobs in Gomshall get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Gomshall is one of 395 places in Surrey where we work for external mastic. You can also see our page for Crawley, about 14 miles away.
Here we cover the GU5 postcode area for external mastic. If you need external mastic at a property on Station Road, High View and Queen Street or a nearby road, we can help. Neighbouring places we cover for external mastic include Shere (1 mile west), Abinger Hammer (1 mile east), Hoe (1 mile south), Albury Heath (1 mile west) and Little London (1 mile south-west). We also work in nearby towns such as Guildford (6 miles west), Woking (9 miles north-west), Camberley (14 miles north-west), Epsom (11 miles north-east), Horley (12 miles east) and Redhill (12 miles east).
Local landmarks in Gomshall
In Gomshall, that means homes and buildings near Black Horse pub and Colekitchen Down and the streets around them. There’s a railway station in Gomshall itself: Gomshall station. A little further out are Abinger Castle (2.2 miles south-east) and Shere Museum (0.6 miles west). Open spaces near Gomshall include Silent Pool and Combe Bottom.
Questions from Gomshall
Will you come out to Gomshall?
Yes, Gomshall is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is Gomshall in your area for external mastic?
Yes, Gomshall is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear price.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
What colours does the sealant come in?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin.
Where do you work from?
Mr Mastic is based in Crawley. We cover Gomshall and the rest of Surrey, along with the rest of our area.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Can you reach joints on upper floors?
It depends on the building. Where joints can be reached safely, we will do them. Tell us about the building and we’ll confirm what access is needed.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Avoid pressure-washing directly into sealant joints
- Act on the first splits you see
- Make sure movement joints aren’t pointed over
- Leave the joints unpainted unless we have said otherwise
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Honest limits
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that’s blown, hollow or coming away
- Adding movement joints to masonry that has none
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Gomshall
- Concrete & block
- Render & cladding joints
- Façade panels
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.