East Sussex · England
External & façade joints in Old Heathfield, East Sussex
External mastic across Old Heathfield and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Joints with sealant missing in places
- Water getting into walls through failed joints
- Old sealant gone brittle and cracked
External mastic in Old Heathfield, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it. If you have old sealant gone brittle and cracked and brick movement joints where the sealant has split, we can help.
Older homes in small places like Old Heathfield may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Location
- Old Heathfield (TN21)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Old Heathfield
Is Old Heathfield within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is there a guarantee on external mastic in Old Heathfield?
All our work, in Old Heathfield and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
How long does external mastic take?
It depends on the size of the job, but most jobs take anything from a few hours to several days, depending on the building. We will give you a better idea when we quote.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
How do I get a quote for external mastic in Old Heathfield?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or email us with a short description of the job.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost, so the problem grows beyond the joint itself. Older cottages and farmhouses around Old Heathfield can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- 20+ years of sealant experience
- We leave the area clean and tidy
- Homes, businesses and hotels
Read what affects the cost or what customers say.
Quotes for external mastic in Old Heathfield
Jobs vary more than people expect. What affects the quote:
- Mould in or behind the old joints
- The number and length of the joints
- How many areas need sealing
- The old material and how stubborn it is
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
What we need to know
Photos by email are helpful but not essential. Please mention:
- Photos by email, if that’s easy
- Any previous sealing or DIY work
- Whether it’s a home or a business
- Roughly how big the job is
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
What we’re called out for in Old Heathfield
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, and it tears off the sides.
Most people get in touch when they notice one of these:
- Weeds or debris growing in open joints
- Movement joints with cracked, split or missing sealant
- Joints where the bead has come unstuck
- Leaking joints around cladding and façade panels
Schools such as Heathfield Community College are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- Who turns up on the day
- What happens if the job turns out different
- How the joint is cleaned and prepared
- Are they insured?
Can I do it myself?
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. Everything old must be removed first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Aftercare tips
Looking after new joints is easy:
- Leave the joints unpainted unless we’ve said otherwise
- Clear growth from the base of walls and joints
- Look over the joints every year, ideally after winter
- Fix overflowing gutters above sealed joints
Do not paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
Also near Old Heathfield
More services for Old Heathfield
What happens on the day
There is not much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation from start to finish. Somewhere like Old Heathfield needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by walking round the building and agreeing the joints and the access.
- 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.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any parking rules near the property
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or drop us an email.
Read more
Old Heathfield buildings and the weather
Historic houses like Bateman's (about 4.9 miles north-east) are a reminder that the area around Old Heathfield has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around The Parish Church of All Saints, an extension built onto an older house moves differently, and the joint between them takes the strain.
Old Heathfield is about 7 miles north of Hailsham, in East Sussex. Whether you are in the middle of Old Heathfield or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Old Heathfield is one of 289 places in East Sussex where we work for external mastic. Brighton is on our list too, about 20 miles from Old Heathfield.
All of TN21 is within our area for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on School Hill and Church Street or a nearby road, our applicators can take on the job. We also cover Cade Street (1 mile north), Sandy Cross (1 mile west), Heathfield (1 mile west), Broad Oak (1 mile north) and Warbleton (1 mile south). Larger places within reach include Eastbourne (12 miles south), Hastings (14 miles south-east), Bexhill-on-Sea (11 miles south-east), Seaford (15 miles south-west), Lewes (13 miles south-west) and Hailsham (7 miles south).
Around Old Heathfield
In Old Heathfield, that means homes and buildings near The Star Inn and Parkside Community Primary School. Other landmarks nearby include Hellingly Hospital (5 miles south) and Old Castle (3.6 miles east). Not far away are Selwyns Wood.
What sealant work cannot fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Structural movement, which needs a surveyor or engineer
- Cracks in the bricks or render themselves, away from the joints
- Damp that isn’t coming from the joint
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Façade panels
- Copings & trims
- Joints between brick and frames