East Sussex · England
Boarshead External Mastic
Our applicators work in Boarshead on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Brick movement joints where the sealant has split
External mastic in Boarshead
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. We work on copings & trims, façade panels and render & cladding joints, and people most often call us about damp patches traced to an open external joint and plants rooting in failed movement joints.
Somewhere as small as Boarshead, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
There’s a 12-month guarantee on every job, large or small.
- Place
- Boarshead (TN6)
- Wider area
- East Sussex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work can’t fix
Before you book, it’s worth knowing the limits too:
- Failed render or damaged cladding panels
- Damp that is not coming from the joint
- Subsidence or other structural problems
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- Concrete & block
- Façade panels
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We cut it out and start again.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Common problems we fix in Boarshead
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it cannot stretch and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
- Plants rooting in failed movement joints
- Failed seals between different materials
Groombridge Place, about 3.3 miles north, is one of the historic houses in the wider area around Boarshead, and older homes nearby need a sealant that suits their walls.
Questions to ask before you book
- Whether VAT is included
- Whether they seal over old material or remove it
- How much experience the applicator has
- How the colour is chosen
Landlords, agents and businesses in Boarshead
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Common questions in Boarshead
Will you come out to Boarshead?
Yes. Boarshead is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Boarshead in your area for external mastic?
Yes. We work across London and the South East, and Boarshead is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
What does external mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Do you work for landlords and businesses?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Do you use backing rod?
That is backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
I rent my home. Can I book you?
Of course. Ask your landlord first, and we can send them the quote if that helps.
How it works
Before we leave, we go over the finished joints with you. The visit itself usually takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. In a small place like Boarshead, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
Before we arrive
- Keep children and pets away from the work area
- Tell us about any water getting in
- Tell us if parking is tricky
Getting a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.
Related advice
Towns and villages near Boarshead
More services for Boarshead
Different surfaces, different methods
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Why it’s worth doing now in Boarshead
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way. Older cottages and farmhouses around Boarshead can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why us?
- Old sealant always removed completely
- A choice of colours where the product allows
- Approved under the ARBOMaster scheme
- Colour agreed with you before any work starts
Read what affects the cost or what customers say.
Outside joints around Boarshead
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Groombridge Place (about 3.3 miles north) nearby, there’s older building stock in the area around Boarshead as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Managing a site like Beacon Academy? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you let a flat or house near Eridge station, outside joints that have cracked can let damp into a rental, so check them between lets.
Boarshead is about 2 miles north-east of Crowborough, in East Sussex. Across the TN6 area, we cover external mastic for homes and businesses. Our East Sussex coverage runs to 289 places, and Boarshead is one of them. We also work in Crawley, about 17 miles from Boarshead.
We cover every part of the TN6 postcode area for external mastic and the streets around it. Boarshead is on the A26, so it’s easy for us to get to with everything needed for external mastic. Close by, we work in Steel Cross (1 mile south), Jarvis Brook (1 mile south), Crowborough (2 miles south-west), Mott's Mill (2 miles north) and Marden's Hill (2 miles west). Larger places within reach include Hailsham (15 miles south), Uckfield (8 miles south-west), South Malling (15 miles south-west), Heathfield (8 miles south), Upper Horsebridge (14 miles south) and Cliffe (15 miles south-west).
Landmarks near Boarshead
In Boarshead, that means homes and buildings near The Boars Head Inn. For rail, the closest station is Eridge station, about 1.4 miles north-east. Well-known places in the area include Crowborough War Memorial Hospital (1.8 miles south-west) and Bolebroke Castle (4.9 miles north-west). Green spaces nearby include Crowborough Country Park.