East Sussex · England
Hailsham External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Hailsham, with a 12-month guarantee on every job. Ask us for a quote.
- Leaking joints around cladding and façade panels
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
About our external mastic in Hailsham
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. We work on joints between brick and frames, façade panels and concrete & block, and common reasons people get in touch are sealant that has lost its bond to the brick or render and old sealant gone brittle and cracked.
Extensions are a common sight on houses around Hailsham, and the joint where new wall meets old is a classic place for water to get in. Getting the joint depth right matters as much as the sealant itself.
There’s a 12-month guarantee on every job, large or small.
- Where
- Hailsham (BN27)
- Region
- East Sussex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Landlords, agents and businesses in Hailsham
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Parking in a town like Hailsham is generally straightforward, but tell us if there’s a driveway or any restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
Ask for a quote
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Advice
Your questions about external mastic in Hailsham
Is there a guarantee on external mastic in Hailsham?
All our work, in Hailsham and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Can you do external mastic in Hailsham?
Yes, Hailsham is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back, so the joint can move.
Can landlords and businesses book you?
Yes. We work for householders, landlords, letting agents, businesses and hotels across East Sussex.
Are you fully insured?
Yes, we are fully insured for every job we do.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Common problems we fix in Hailsham
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Common reasons people contact us include:
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
- Panel joints letting water in
If you look after a building such as Hailsham Community College, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before booking anyone
- What happens if they find a problem under the old sealant
- What the cure time is
- Whether they seal over old material or remove it
- How the colour is chosen
External mastic in Hailsham: local notes
Historic houses like Horselunges Manor (about 1.5 miles north) are a reminder that the area around Hailsham has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Polegate station, split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as The Parish Church of Saint Mary, an extension built onto an older house moves differently, and the joint between them takes the strain.
Hailsham is about 6 miles north of Eastbourne, in East Sussex. Whether you’re in the middle of Hailsham or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 289 places across East Sussex. There’s also a page for Brighton, about 17 miles away.
We cover every part of the BN27 postcode area for external mastic and the streets around it. Whether your property is on High Street, Market Place and Station Road or anywhere close by, our applicators can take on the job. Main roads around Hailsham include the A271 and A295. We also cover the places around Hailsham: Tile Hurst (1 mile north-west), Upper Horsebridge (1 mile north), Hellingly (1 mile north), Lower Horsebridge (1 mile north-west) and Magham Down (2 miles north-east). Within a short drive, we also cover Eastbourne (6 miles south), Hastings (13 miles east), Bexhill-on-Sea (9 miles east), Seaford (9 miles south-west), Lewes (11 miles west) and Crowborough (14 miles north). Hailsham is one of the larger places we cover in East Sussex.
Near you in Hailsham
Locally, jobs take us to homes and businesses close to The Grenadier pub and White House Academy and the streets around them. The nearest railway station is Polegate station, about 3 miles south. A little further out are Herstmonceux Castle (3.6 miles east) and Amberstone Hospital (1.5 miles north-east). Not far away are Combe Hill.
What affects the cost of external mastic
You will get a clear quote before any work starts. It’s based on:
- Whether there’s mould to deal with
- Any working-time requirements on site
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before we start.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Any previous sealing or DIY work
- Where the job is, and your postcode
- A few pictures by email, if you can
- What the problem is, such as mould, gaps, leaks or cracking
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear quote before we start.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Act on the first splits you see
- Tell anyone working on the walls about the movement joints
- Wash walls gently around the sealant
- Deal with leaking gutters that soak the joints below
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
Towns and villages near Hailsham
Also in Hailsham
What happens if it’s left?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and does not last. In a family home in Hailsham, a failed seal around a bath or a frame lets water into places you can’t see, such as under the floor, behind a panel or into a wall. Whatever the joint, failed sealant only gets worse.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- Any old sealant cut out fully, not covered over
- Rated 4.9 stars on Google
- Arbo and Everbuild products
Take a look at what affects the cost and our reviews.