East Sussex · England
Boreham Street External Mastic
Specialist external mastic for Boreham Street: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Rigid filler in a joint that should flex
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Avoid pressure-washing directly into sealant joints
- Check external joints each spring
- Make sure movement joints aren’t pointed over
- Show decorators and builders where the movement joints are
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Act while the splits are small. At that stage it’s a simple cut out and reseal before water has had years to get in.
External mastic for homes and businesses in Boreham Street
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing, and we do not skip that step. We work on concrete & block, brickwork movement joints and façade panels, and people most often call us about weathered mastic that no longer stretches and water getting into walls through failed joints.
Older homes in small places like Boreham Street may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or drop us an email.
- Location
- Boreham Street (BN27)
- Region
- East Sussex
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant.
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
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.
Quotes for external mastic in Boreham Street
The quote reflects the job in front of us. We take into account:
- Mould in or behind the old joints
- Any working-time requirements on site
- The type of sealant required
- The number of rooms or windows
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What to tell us for a quote
When you call or email, these details help:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- Any access issues, like height or stairs
Every job is quoted individually. Just call 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Outside joints around Boreham Street
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In and around Boreham Street, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Boreham Street is about 5 miles north-west of Bexhill-on-Sea, in East Sussex. Boreham Street gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Boreham Street is one of 289 towns and villages in East Sussex we cover. You can also see our page for Brighton, roughly 22 miles from Boreham Street.
Every address in BN27 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Boreham Lane, Wood Lane and Boreham Hill or anywhere close by, our applicators can take on the job. If you’re just outside Boreham Street, we cover Windmill Hill (1 mile north-west), Wartling (1 mile south-west), Flowers Green (2 miles west), Chapel Row (2 miles west) and Golden Cross (2 miles west). Within a short drive, we also cover Eastbourne (7 miles south-west), Hastings (9 miles east), Bexhill-on-Sea (5 miles south-east), Seaford (13 miles south-west), Hailsham (5 miles west) and Crowborough (15 miles north-west).
Near you in Boreham Street
Around Boreham Street, our work takes us to homes and buildings near The Bulls Head Inn and the streets around them. The closest station to Boreham Street is Normans Bay station, roughly 3.7 miles south. Well-known places in the area include Amberstone Hospital (4 miles west) and Herstmonceux Castle (1.3 miles south-west). Not far away are Gillham Wood.
Also near Boreham Street
What else we do in Boreham Street
Signs you need external mastic in Boreham Street
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
Any of these means the joints need attention:
- Failed sealant between panels on a façade
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
If you let a flat or house near Normans Bay station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- What the quote includes, VAT included or not
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
- What the cure time is
For landlords and businesses
Landlords and agents in Boreham Street can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
If you manage several properties in or around Boreham Street, several properties can go on one quote. Send us the addresses and the work at each.
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it generally takes anything from a few hours to several days, depending on the building. For a village or hamlet like Boreham Street, 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 inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
- Tell us if parking is tricky
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
Related advice
Your questions about external mastic in Boreham Street
Do you cover smaller places like Boreham Street?
Yes, Boreham Street is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Normans Bay station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Do you take out the old sealant first?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
What information do you need?
A short description and the location, plus photos if you have them. We will ask anything else we need to know.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so the joint does not draw the eye.