East Sussex · England
Barcombe External Mastic
We cover Barcombe for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Cracked joints where brick meets render or frames
- Sealant pulling away from one side of the joint
- Moss and dirt in joints with no sealant left
About our external mastic in Barcombe
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. If you have brick movement joints where the sealant has split and joints pointed up with cement by mistake, we can help, whatever the surface.
In a village or hamlet like Barcombe, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Barcombe (BN8)
- Wider area
- East Sussex
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Your questions about external mastic in Barcombe
Can you help a landlord with a rental near Cooksbridge station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Can you do external mastic in Barcombe?
Yes, Barcombe is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
Do you guarantee your work?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we will sort it.
What should I tell you?
Only a few details: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or send us an email.
How long does external mastic take?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including the preparation. We’ll confirm how long when we quote.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
How much does external mastic cost in Barcombe?
Size, access and the old material all affect the cost. Call for a quick quote.
Common problems we fix in Barcombe
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
The problems people usually mention when they call include:
- Old sealant gone brittle and cracked
- Movement joints with cracked, split or missing sealant
- Panel joints letting water in
- Damp patches traced to an open external joint
For site and facilities teams at buildings such as Barcombe Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before you book
- Which colour the sealant will be
- Whether all the old sealant comes out first
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
Why act early in Barcombe
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. Where a wall is exposed, as many are in small places like Barcombe, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Barcombe
- Anti-fungal sanitary silicone in wet areas
- A choice of colours where the product allows
- Over 20 years’ experience
- Experience in homes, commercial sites and hotels
Read what affects the cost or customer reviews.
When it is not the sealant
We will not take on work that will not last, so here’s what sealant cannot put right:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Render that is blown, hollow or coming away
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly before you book.
Joints and surfaces we work on
- Concrete & block
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
What external mastic looks like in Barcombe
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Glyndebourne (about 3.2 miles south-east) are a reminder that the area around Barcombe has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For an older house near a landmark such as The Parish Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Cooksbridge station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Barcombe is about 3 miles north of Lewes, in East Sussex. Homes, rented property, offices and hotels in Barcombe can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Barcombe is one of 289 places in East Sussex we cover for external mastic. For nearby work, see our Brighton page (9 miles or so).
Every address in BN8 is covered for external mastic, from the main roads to the quietest streets. We also cover the places around Barcombe: Barcombe Mills (1 mile east), Barcombe Cross (1 mile north), Upper Wellingham (1 mile south-east), Mount Pleasant (1 mile north) and Cooksbridge (1 mile south-west). Within a short drive, we also cover Eastbourne (15 miles south-east), Seaford (10 miles south), Lewes (3 miles south), Hailsham (11 miles east), Crowborough (11 miles north-east) and Uckfield (5 miles north-east).
Landmarks near Barcombe
Typical jobs here are in homes near Anglers Rest pub and Ringmer Community College and Sixth Form, among other places. The closest station to Barcombe is Cooksbridge station, roughly 1.5 miles south-west of the centre. Nearby you will also find Lewes Victoria Hospital (3 miles south) and Lewes Castle (3 miles south). For a walk, there’s Offham Hill and Malling Down.
The process
There isn’t much for you to do on the day. Show us the job and we will take it from there. The job generally takes anything from a few hours to several days, depending on the building, including the tidy-up. For a village or hamlet like Barcombe, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- 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.
Before we arrive
- Clear the area around the work
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and give you a clear quote.
Related advice
Towns and villages near Barcombe
More services for Barcombe
Landlord and commercial work in Barcombe
For anyone letting property in or around Barcombe, several properties can be quoted together. Just tell us the addresses and what each one needs.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Clear growth from the base of walls and joints
- Look over the joints every year, ideally after winter
- Leave the joints unpainted unless we’ve said otherwise
- Act on the first splits you see
Keep pressure washers away from the sealant. High-pressure water can lift the edges and let water in behind.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Which sealant suits the joint
- When we can work, for business premises
- Whether there’s mould to deal with
- The number and length of the joints
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Asking for a quote
When you call or email, these details help:
- Whether it has been sealed before
- Roughly how big the job is
- Photos by email, if that is easy
- The type of property
Getting a quote is simple: let us know the job and the location and its rough size. A few photos by email make the job easier to understand.