Kent · England
Horden External Mastic
External mastic in Horden from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
- Plants rooting in failed movement joints
How we handle external mastic in Horden
Low-level joints can usually be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what access is needed. If you are dealing with failed sealant between panels on a façade and hard, crazed mastic that has stopped moving, we can help, on render & cladding joints, concrete & block and brickwork movement joints alike.
Older homes in small places like Horden may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- Horden (TN17, TN12)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Walls and rooflines in Horden
Compared with the north and west, the South East gets less rain, 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 Marden station, split movement joints are easy to miss on a rental until damp shows inside. If you look after a building such as Colliers Green Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Horden is about 6 miles south-east of Paddock Wood, in Kent. Every kind of property in Horden is covered for external mastic. The work is guaranteed for a year. Our Kent coverage runs to 922 places, Horden among them. You can also see our page for Crawley, roughly 30 miles from Horden.
Here we cover the TN17 and TN12 postcode area for external mastic. You’ll find streets such as Hill Top and Husheath Hill, all of which we cover. Neighbouring places we cover for external mastic include Colliers Green (1 mile south), Flishinghurst (2 miles south), Marden Thorn (2 miles north), Knox Bridge (2 miles east) and Cranbrook Common (3 miles east). Within a short drive, we also cover Maidstone (9 miles north), Royal Tunbridge Wells (10 miles west), Tonbridge (11 miles north-west), Kings Hill (10 miles north-west), Foley Park (10 miles north) and Paddock Wood (6 miles north-west).
Near you in Horden
Typical jobs here are in homes near The Gill. Horden’s nearest station is Marden station, about 2.9 miles north of the centre. Well-known places in the area include Sissinghurst Castle (3.6 miles east) and Brattle Farm Museum (2 miles north-east).
Why it’s worth doing now in Horden
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Where a wall is exposed, as many are in small places like Horden, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
Why us?
- You choose the colour before work begins
- Quality sealants from Arbo and Everbuild
- Experience in homes, commercial sites and hotels
- Full insurance on every job
Read how sealant jobs are priced or our reviews.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to several days, depending on the building. In a small place like Horden, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
How to get a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Advice
Looking after it afterwards
After the cure time, these simple habits help:
- Do not let climbing plants root in the sealant
- Have failed joints looked at early
- Fix overflowing gutters above sealed joints
- Tell anyone working on the walls about the movement joints
Keep pressure washers away from the sealant. 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.
Places near Horden
Other services in Horden
Common questions in Horden
Can you help a landlord with a rental near Marden station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Will you come out to Horden?
Yes, Horden is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
What does external mastic cost?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or drop us an email with a short description of the job.
Is there any odour?
Possibly a little. It fades as the sealant cures.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What information do you need?
A short description and the location. If we need more, we will ask.
Are you fully insured?
Yes. We’re fully insured for domestic and commercial work.
Quotes for external mastic in Horden
You’ll get a clear quote before we start. It takes into account:
- How easy the joints are to reach
- When we can work, for business premises
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
Combining jobs into one visit generally makes better use of the time than several visits. We’ll give you a clear quote for the lot.
Helping us quote
Photos help, but a description is a good start. Please mention:
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- How we’d reach the joints
- What’s wrong with the joints now
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
What the job involves on each surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Cracking across the wall rather than at a joint
- Adding movement joints to masonry that has none
- Structural movement, which needs a surveyor or engineer
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before booking.
What we seal
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Façade panels