Surrey · England
External Mastic in Horne
Problem with your movement joints in Horne? We cut out the old, prepare the joints and apply the right sealant.
- Old sealant gone brittle and cracked
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
External mastic for homes and businesses in Horne
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. We work on copings & trims, render & cladding joints and façade panels, and the jobs we see most are failed sealant between panels on a façade and rain getting behind render or cladding at a joint.
Older homes in small places like Horne may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
Whatever the size of the job, you get the same one-year guarantee in Horne and across Surrey.
- Place
- Horne (RH6)
- Region
- Surrey
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Horne
A failed movement joint lets water into the wall and can run behind render or cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Where a wall is exposed, as many are in small places like Horne, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Combining jobs into one visit is usually more efficient than separate visits. We will give you a clear quote for the lot.
Why Horne customers choose us
- Old sealant always removed completely
- Full insurance on every job
- We agree the colour with you first
- Experience in homes, commercial sites and hotels
Take a look at what affects the cost or customer reviews.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
How we quote for external mastic
The price is agreed before any work begins. It takes into account:
- The number and length of the joints
- The product the joint needs
- When we can work, for business premises
- Whether the work is at height
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
What to tell us for a quote
To help us quote quickly, let us know:
- Access, such as stairs, a lift or height
- The rough size of the job
- A few photos by email, if you can
- If it’s domestic, commercial or a hotel
For external mastic in Horne, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Outside joints around Horne
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Godstone station, outside joints that have cracked can let damp into a rental, so check them between lets. Homes close to Church of St Mary the Virgin include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Horne is about 4 miles east of Horley, in Surrey. Horne gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 395 places across Surrey, large and small. Crawley is on our list too, about 7 miles from Horne.
We work across the RH6 postcode area for external mastic. Local streets include Church Road and Whitewood Lane, all of which we cover. Neighbouring places we cover for external mastic include Whitewood (1 mile north-east), Blindley Heath (1 mile north-east), Newchapel (2 miles south-east), Lingfield Common (3 miles east) and Domewood (3 miles south). Within a short drive, we also cover Epsom (13 miles north-west), Horley (4 miles west), Redhill (5 miles north-west), Ewell (14 miles north-west), Reigate (6 miles north-west) and Caterham (7 miles north).
Near you in Horne
Locally, jobs take us to homes and businesses close to The Jolly Farmer pub and the streets around them. The closest station to Horne is Godstone station, roughly 2.6 miles north-east of the centre. Nearby you’ll also find East Surrey Hospital (4.2 miles north-west) and Bletchingley Castle (3.8 miles north). The countryside around Horne includes Bay Pond and Hedgecourt Lake.
Keeping the joints in good condition
So the new joints stay in good condition:
- Show decorators and builders where the movement joints are
- Keep soil, plants and ivy away from the joints
- Make sure movement joints aren’t pointed over
- Ask before painting over external sealant
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint and spoil the finish.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
Honest limits
We will not take on work that will not last, so here’s what sealant cannot put right:
- Loose or hollow render, which needs re-rendering
- Subsidence or other structural problems
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Where we work in Horne
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
- Copings & trims
- Render & cladding joints
Towns and villages near Horne
Other services in Horne
Horne: your questions answered
I let a flat near Godstone station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do you cover Horne for external mastic?
Yes, Horne is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Is it OK to fill a movement joint with cement?
No. Cement or mortar cannot stretch, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
Do you have insurance?
Yes. Mr Mastic is fully insured.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
How much does external mastic cost in Horne?
There’s no set price, as it 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.
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. Somewhere as small as Horne, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or email us.
Advice
Work for landlords, hotels and businesses
We work for landlords and letting agents as well as householders. Resealing between tenancies keeps a property looking cared for.
If you manage several properties in or around Horne, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.