Surrey · England
Addlestone External Mastic
Problem with your movement joints in Addlestone? We cut out the old, prepare the joints and apply the right sealant.
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
- Damp patches traced to an open external joint
About our external mastic in Addlestone
On houses, flats and commercial buildings across Addlestone, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you’re dealing with moss and dirt in joints with no sealant left and sealant that has lost its bond to the brick or render, we can help.
Outbuildings, garages and conservatories around homes in places like Addlestone add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
Our work is backed for twelve months, in Addlestone and everywhere else we cover.
- Where
- Addlestone (KT15)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Surface by surface
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep high-pressure jets off the joints
- Leave the joints unpainted unless we’ve said otherwise
- Check external joints each spring
- Don’t let climbing plants root in the sealant
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
What affects the quote in Addlestone
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- Whether the work is at height
- Any mould that needs treating
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear quote for the lot.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
- The type of property
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or send us an email.
Walls and rooflines in Addlestone
Historic houses like Botleys Mansion (about 1.8 miles west) are a reminder that the area around Addlestone has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Homes close to St Paul's include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Darley Dene Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Addlestone is about 5 miles north-east of Woking, in Surrey. From the centre of Addlestone to the outskirts, we cover external mastic for every kind of property. Across Surrey, we cover 395 places, and Addlestone is one of them. For nearby work, see our London page.
Postcode districts we cover here for external mastic: KT15. Streets in the area include Market Street, High Street and Station Road, all of which we cover. Addlestone is on the A317 and A318, so it’s easy for us to get to with everything needed for external mastic. Other places close to Addlestone include New Haw (1 mile south), Brooklands (2 miles south-east), Weybridge (2 miles east), St George's Hill (2 miles east) and Byfleet (2 miles south). We also work in nearby towns such as Guildford (9 miles south), Woking (5 miles south-west), Camberley (11 miles west), Epsom (10 miles east), Ewell (10 miles east) and Egham (5 miles north-west).
Around Addlestone
Typical jobs here are in homes near Jubilee High School, Woburn Park and St George's College Weybridge and the streets around them. Addlestone has its own railway station: Addlestone station. Nearby you’ll also find Runnymede Hospital (1.5 miles west). Green spaces nearby include St Ann's Hill and Gracious Pond.
Landlord and commercial work in Addlestone
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
What we do, step by step
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours to a few days, depending on the length of joint and the access. For a job in Addlestone, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
Get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Towns and villages near Addlestone
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Your questions about external mastic in Addlestone
Do you cover smaller places like Addlestone?
Yes. Addlestone 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.
Can you help a landlord with a rental near Addlestone station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
What does external mastic cost?
It depends on the job, so we quote each one individually. To get one, ring 0345 464 0079 or email us with a short description of the job.
Can I do it myself?
Sometimes. 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.
Where do you work from?
We work from Crawley. Our applicators cover Addlestone, along with the rest of our area.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
What we’re called out for in Addlestone
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, and it tears off the sides.
It’s worth asking for a quote if you see:
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
If you let a flat or house near Addlestone station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- Whether all the old sealant comes out first
- Whether they’re fully insured
- How the joint is cleaned and prepared
- What guarantee comes with the work