Kent · England
Lower Haysden External Mastic
Our applicators work in Lower Haysden on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Rain getting behind render or cladding at a joint
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Avoid pressure-washing directly into sealant joints
- Get split or bare joints resealed while the damage is small
- Keep water from gutters off the wall
- Make sure movement joints aren’t pointed over
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges over time.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
External mastic for homes and businesses in Lower Haysden
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where mortar or filler would crack. We work on concrete & block, joints between brick and frames and façade panels, and common reasons people get in touch are movement joints filled with mortar instead of sealant and cracked joints where brick meets render or frames.
Somewhere as small as Lower Haysden, 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.
Every job is covered by our one-year guarantee, wherever you are in Kent.
- Where
- Lower Haysden (TN11)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
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.
Cladding and façade panels
If the façade has a specified sealant, that’s what we use or an approved alternative. Send us any details you have about the façade.
What affects the cost of external mastic
You’ll get a clear quote before any work starts. It’s based on:
- When we can work, for business premises
- The amount of work
- Access and height
- Which sealant suits the joint
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- The type of property
- Whether it has been sealed before
- Access, such as stairs, a lift or height
- The rough size of the job
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Towns and villages near Lower Haysden
Also in Lower Haysden
Why act early in Lower Haysden
Running new sealant over the old bead rarely lasts. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. Around Lower Haysden, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on how much there is to do, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Why Lower Haysden customers choose us
- Every job guaranteed for a year
- Colour agreed with you before any work starts
- Fully insured
- A choice of colours where the product allows
Read what affects the cost or what customers say.
Lower Haysden questions
Do you work for landlords with property near Tonbridge station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is Lower Haysden in your area for external mastic?
Yes, Lower Haysden is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Do you work at height?
Each building is different. Send us pictures and a rough idea of the height, and we will confirm what access is needed.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
Walls and rooflines in Lower Haysden
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Penshurst Place (about 2.8 miles west) are a reminder that the area around Lower Haysden 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.
Rented homes near Tonbridge station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Schools such as Sussex Road Community Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Lower Haysden is about 2 miles south-west of Tonbridge, in Kent. Whether you are in the middle of Lower Haysden or further out, external mastic is available for homes and businesses alike. 922 places in Kent are on our list, from the larger towns to small villages. For nearby work, see our Crawley page, about 20 miles away.
All of TN11 is within our area for external mastic. Nearby, we also carry out external mastic in Leigh (1 mile west), Bidborough (1 mile south), Tonbridge (2 miles north-east), Printstile (2 miles south-west) and Southborough (2 miles south). We also work in nearby towns such as Maidstone (13 miles north-east), Sevenoaks (7 miles north), Royal Tunbridge Wells (4 miles south), Swanley (15 miles north), Kings Hill (9 miles north-east) and Foley Park (14 miles north-east).
Near you in Lower Haysden
Typical jobs here are in homes near West Kent College, The Plough Inn and The Judd School and the streets around them. The closest station to Lower Haysden is Tonbridge station, about 1.1 miles east of the centre. Other landmarks nearby include The Milne Museum (1.4 miles north-east) and Tonbridge Castle (1.3 miles north-east). Green spaces nearby include Barden Lake and Tudeley Woods RSPB reserve.
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes anything from a few hours to several days, depending on the building. Somewhere like Lower Haysden needs a little journey planning: 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.
- First we look over the joints with you, agree which to renew and talk through access.
- 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.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
Get a quote
We do not publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.
Advice
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Cracks in the bricks or render themselves, away from the joints
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Copings & trims
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
Do you need external mastic in Lower Haysden?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Look out for any of the following:
- Rain getting behind render or cladding at a joint
- Brick movement joints where the sealant has split
- Sealant pulling away from one side of the joint
- Panel joints letting water in
In the older streets around St Stephen's Mission Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- The length of the guarantee
- Which colour the sealant will be
- Which sealant they’ll use, and why
- Is the old sealant removed completely?