East Sussex · England
External Mastic in Penhurst
External mastic for Penhurst, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking joints around cladding and façade panels
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
Penhurst questions
Is Penhurst within the area you cover?
Yes, Penhurst is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Battle station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
How do I get a quote for external mastic in Penhurst?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or email us and let us know what needs doing and where.
Do you guarantee your work?
Yes. All our work carries our one-year guarantee.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
External mastic in Penhurst
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. If you have sealant pulling away from one side of the joint and old sealant gone brittle and cracked, we can put it right, on brickwork movement joints, joints between brick and frames and render & cladding joints alike.
Somewhere as small as Penhurst, 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.
Whatever the size of the job, you get the same one-year guarantee in Penhurst and across East Sussex.
- Where
- Penhurst (TN33)
- Region
- East Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Avoid pressure-washing directly into sealant joints
- Tell anyone working on the walls about the movement joints
- Keep water from gutters off the wall
- Look over the joints every year, ideally after winter
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
How it works
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a small place like Penhurst, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- Keep children and pets away from the work area
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
How to get a quote
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.
Related advice
Landlords, agents and businesses in Penhurst
If you manage several properties in or around Penhurst, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
What affects the quote in Penhurst
Jobs vary more than people expect. The main factors:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- Any mould that needs treating
- The type of sealant required
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. You’ll know the price before we begin.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
- How many joints, rooms or windows are involved
- Photos by email, if that’s easy
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Places near Penhurst
Also in Penhurst
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that is blown, hollow or coming away
- Subsidence or other structural problems
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
What we seal
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
- Concrete & block
Why act early in Penhurst
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. Older cottages and farmhouses around Penhurst can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins, so you know where you stand.
Why us?
- Any old sealant cut out fully, not covered over
- Homes, businesses and hotels
- We’re fully insured
- We leave the area clean and tidy
See what affects the cost and our reviews.
When to call us in Penhurst
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Look out for these signs:
- Movement joints with cracked, split or missing sealant
- Movement joints filled with mortar instead of sealant
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
For landlords with property near Battle station, split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before you book
- What the cure time is
- How hidden problems are handled
- Which colour the sealant will be
- The length of the guarantee
External mastic in Penhurst: local notes
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. With historic houses such as Bateman's (about 4.7 miles north) nearby, there’s older building stock in the area around Penhurst as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you live in an older home near The Parish Church of St Michael, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Penhurst is about 6 miles north-west of Bexhill-on-Sea, in East Sussex. We carry out external mastic for householders, landlords and businesses in Penhurst and the surrounding area, as part of our work across East Sussex. Our area takes in 289 places across East Sussex, large and small. Our Brighton page covers work nearby, about 24 miles away.
Our applicators cover all of the TN33 postcode area for external mastic. Other places close to Penhurst include Steven's Crouch (2 miles south-east), Netherfield (2 miles north-east), Twelve Oaks (2 miles north), Hollingrove (3 miles north) and Brightling (3 miles north). We also work in nearby towns such as Eastbourne (11 miles south-west), Hastings (8 miles south-east), Bexhill-on-Sea (6 miles south-east), Hailsham (8 miles south-west), Crowborough (14 miles north-west) and St Leonards (8 miles south-east).
Near you in Penhurst
In Penhurst, that means homes and buildings near Ashburnham Park, among other places. Penhurst’s nearest station is Battle station, roughly 3.8 miles east of the centre. A little further out are Battle Museum of Local History (3.2 miles east) and Bexhill Hospital (5.8 miles south-east). Green spaces nearby include Senlac Hill.