East Sussex · England
External Mastic in Ashton Green
External mastic in Ashton Green from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Failed seals between different materials
- Weeds or debris growing in open joints
- Old sealant gone brittle and cracked
Why it’s worth doing now in Ashton Green
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. In a small place like Ashton Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and give you a clear price before we start.
Why us?
- A 12-month guarantee on all work
- 20+ years of sealant experience
- Neat joints and a tidy finish
- Sealant colour chosen to suit
Take a look at how sealant jobs are priced or customer reviews.
External mastic in Ashton Green, done properly
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. If you’re dealing with weeds or debris growing in open joints and weathered mastic that no longer stretches, we can put it right.
External sealant needs dry, clean surfaces, so work around Ashton Green is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
We stand behind the work with a one-year guarantee.
- Place
- Ashton Green (BN8)
- Region
- East Sussex
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Ashton Green
For anyone letting property in or around Ashton Green, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
What we cannot put right
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Render that’s blown, hollow or coming away
- Cracking across the wall rather than at a joint
- Walls that need new movement joints cut into them
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Where we work in Ashton Green
- Façade panels
- Render & cladding joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Keep movement joints as flexible joints, not mortar
- Point out the joints to other trades
- Have failed joints looked at early
- Check external joints each spring
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
Ashton Green questions
Is Ashton Green within the area you cover?
Yes. Ashton Green is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Glynde station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Can you reach joints on upper floors?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours for a handful of joints, longer for a whole elevation. We’ll tell you when we quote.
How long does external mastic last?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch, so the joint stops doing its job. If it has already been filled, we can normally cut it out and reseal it.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Nearby places to Ashton Green
Other services in Ashton Green
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What the job involves on each surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Outside joints around Ashton Green
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. Historic houses like Glyndebourne (about 1 mile south-west) are a reminder that the area around Ashton Green 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.
Letting a property close to Glynde station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around The Parish Church of St Mary the Virgin, older walls, gutters and the joints where extensions meet them need a flexible sealant. Managing a site like Ringmer Primary and Nursery School? Then its movement joints, gutters and trims need looking after like any other building’s.
Ashton Green is about 3 miles east of Lewes, in East Sussex. For external mastic in and around Ashton Green, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We are based in Crawley and cover East Sussex. Ashton Green is one of 289 towns and villages in East Sussex where we work for external mastic. You can also see our page for Brighton, roughly 10 miles from Ashton Green.
All of BN8 is covered for external mastic. Whether your property is on Neaves Lane and Potato Lane or anywhere close by, our applicators can take on the job. If you are just outside Ashton Green, we cover Ringmer (1 mile west), Glyndebourne (1 mile south-west), Glynde (2 miles south), Cliffe (3 miles south-west) and Firle (3 miles south). We also work in nearby towns such as Eastbourne (12 miles south-east), Seaford (8 miles south), Lewes (3 miles west), Hailsham (8 miles east), Crowborough (12 miles north) and Uckfield (6 miles north).
What’s near Ashton Green
Locally, jobs take us to homes and businesses close to Ringmer Community College and Sixth Form and The Green Man pub and the streets around them. For rail, the closest station is Glynde station, about 2.1 miles south. Other landmarks nearby include Museum of Agricultural Bygones (0.7 miles north-east) and Lewes Victoria Hospital (3.8 miles west). The countryside around Ashton Green includes Malling Down and Cliffe Hill.
What happens on the day
Every visit runs the same way: we check the joints, protect the area around them, do the work and clear up. It usually takes anything from a few hours to several days, depending on the building. For a village or hamlet like Ashton Green, 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.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Keep pets and children clear of the area while we work
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
If you are in Ashton Green and need external mastic, ring 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.