East Sussex · England
External Mastic in Friston
Professional external mastic in and around Friston, with every bit of old sealant taken out first and a 12-month guarantee.
- Plants rooting in failed movement joints
- Failed seals between different materials
- Leaking joints around cladding and façade panels
Friston: your questions answered
Does living near the coast affect external mastic in Friston?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
I let a flat near Eastbourne station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used before we leave.
External mastic for homes and businesses in Friston
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. We work on brickwork movement joints, copings & trims and façade panels, and people most often call us about water getting into walls through failed joints and weeds or debris growing in open joints.
Outbuildings, garages and conservatories around homes in places like Friston add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
There’s a 12-month guarantee on every job.
- Location
- Friston (BN20)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. We prime where the sealant needs it before the bead.
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Should I try it myself first?
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, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. 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.
Friston buildings and the weather
Friston is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. With historic houses such as Alfriston Clergy House (about 3.7 miles north-west) nearby, there’s older building stock in the area around Friston as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you live in an older home near The Parish Church of St Simon and St Jude, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Friston is about 4 miles south-west of Eastbourne, in East Sussex. For external mastic in and around Friston, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover East Sussex from our Crawley base, Friston included. We cover 289 towns and villages across East Sussex. Brighton is on our list too, around 16 miles away.
We cover every part of the BN20 postcode area for external mastic. If you need external mastic at a property on Dene Side, Dene Close and Michel Close or anywhere close by, our applicators can take on the job. We also cover the places around Friston: East Dean (1 mile south-west), Birling Gap (1 mile south), Jevington (2 miles north), Old Town (3 miles east) and Meads (3 miles east). Further out, we also cover Eastbourne (4 miles north-east), Bexhill-on-Sea (13 miles north-east), Seaford (4 miles west), Lewes (12 miles north-west), Hailsham (7 miles north) and Uckfield (15 miles north).
Local landmarks in Friston
In Friston, that means homes and buildings near The Tiger Inn. The closest station to Friston is Eastbourne station, about 3.2 miles east of the centre. Nearby you will also find Eastbourne District General Hospital (3 miles north-east) and Filching Manor And Motor Museum (3 miles north). Not far away are Combe Hill.
Towns and villages near Friston
What else we do in Friston
Why it’s worth doing now in Friston
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. Homes in smaller places like Friston can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why book with us
- A 12-month guarantee on all work
- We never seal over old sealant
- Experience in homes, commercial sites and hotels
- Tidy, careful work
Signs you need external mastic in Friston
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Any of these means the joints need attention:
- Movement joints with cracked, split or missing sealant
- Rigid filler in a joint that should flex
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
Rented homes near Eastbourne station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before booking
- Whether you can choose the colour
- When the joint can take water or movement
- Whether they’re fully insured
- Whether the sealant suits the joint
The process
The work is kept neat and contained to the area we’re working on, so you can get on with your day. The job usually takes a few hours for a handful of joints, longer for a whole elevation, and we tell you how long to leave it before we go. In a smaller place like Friston, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- On commercial sites, let us know about site rules
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
How to get a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before we start.
Related advice
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
- Have failed joints looked at early
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
Landlords, agents and businesses in Friston
Housing providers, facilities teams and property managers book us too in Friston and across East Sussex. We can quote a run of properties together.
If you manage several properties in or around Friston, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.