Buckinghamshire · England
External & façade joints in Kingswood, Buckinghamshire
Movement joints in Kingswood need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Rigid filler in a joint that should flex
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
External mastic for homes and businesses in Kingswood
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We work on concrete & block, façade panels and brickwork movement joints, and common reasons people get in touch are old sealant gone brittle and cracked and rain getting behind render or cladding at a joint.
Outside joints can only be sealed when they’re dry, so work in Kingswood is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Kingswood (HP18)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of external mastic
We quote each job individually. This is what makes a difference:
- The product the joint needs
- The number of rooms or windows
- How easy the joints are to reach
- The size of the job
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
- How we’d reach the joints
- The address or postcode of the job
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or drop us an email.
FAQs for Kingswood
Is Kingswood in your area for external mastic?
Yes, Kingswood is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing.
What guarantee comes with external mastic in Kingswood?
All our work, in Kingswood and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
How do I get a quote for external mastic in Kingswood?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
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.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
External mastic in Kingswood: local notes
Historic houses like Waddesdon Manor (about 3 miles south-east) are a reminder that the area around Kingswood 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. 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.
Managing a site like Grendon Underwood Combined School? Then larger buildings have long runs of movement joint that eventually need resealing. Waddesdon Manor, about 3 miles south-east, is one of the historic houses in the wider area around Kingswood, and older homes nearby need a sealant that suits their walls.
Kingswood is about 7 miles east of Bicester, in Buckinghamshire. For external mastic in and around Kingswood, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Buckinghamshire. Our Buckinghamshire coverage runs to 263 places, Kingswood among them. You can also see our page for Oxford, about 13 miles away.
Jobs for external mastic in HP18 is quoted and booked the same way as anywhere else. That includes homes and businesses on Grendon Road and Kingswood Lane. Neighbouring places we cover for external mastic include Westcott (2 miles south-east), Quainton (3 miles east), Ashendon (3 miles south), Waddesdon (4 miles south-east) and Wormstone (4 miles south-east). Larger places within reach include Aylesbury (8 miles south-east), Buckingham (9 miles north), Elmhurst (9 miles east), Southcourt (9 miles south-east), Princes Risborough (12 miles south-east) and Haydon Hill (7 miles south-east).
Near you in Kingswood
Around Kingswood, our work takes us to homes and buildings near The Akeman Inn. Open spaces near Kingswood include Upper Ray Meadows.
How it works
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. The job normally takes anything from a few hours to several days, depending on the building. In a small place like Kingswood, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- 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.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
- Keep children and pets away from the work area
Getting a quote
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Related advice
Work for landlords, hotels and businesses
If you manage several properties in or around Kingswood, several properties can go on one quote. Just tell us the addresses and what each one needs.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Why act early in Kingswood
Mortar or ordinary filler might look like a quick way to close an open joint, 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 Kingswood, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
What you get with us
- Anti-fungal silicone where joints get wet
- 20+ years of sealant experience
- We leave the area clean and tidy
- White, clear, grey or coloured to suit, where the product allows
Take a look at our cost guide and our reviews.
How to look after the new joints
To keep the joints looking good and working properly:
- Make sure movement joints are not pointed over
- Look over the joints every year, ideally after winter
- Act on the first splits you see
- Deal with leaking gutters that soak the joints below
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Other services in Kingswood
What the job involves on each surface
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it.