Buckinghamshire · England
External & façade joints in Botley, Buckinghamshire
External mastic across Botley and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Movement joints with cracked, split or missing sealant
- Plants rooting in failed movement joints
- Damp patches traced to an open external joint
What we do, step by step
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. Somewhere as small as Botley, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Keep children and pets away from the work area
- Let us know about parking restrictions
- Move anything stored near the joints
How to get a quote
If you are in Botley and need external mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.
Related advice
External mastic in Botley, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. Common call-outs are for weeds or debris growing in open joints and joints with sealant missing in places, on render & cladding joints, copings & trims and façade panels.
Around Botley, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
You get a 12-month guarantee, the same in Botley as everywhere else we work.
- Place
- Botley (HP5)
- Wider area
- Buckinghamshire
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Botley
What else we do in Botley
What we can’t put right
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Damp that isn’t coming from the joint
- Loose or hollow render, which needs re-rendering
- Structural movement, which needs a surveyor or engineer
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Façade panels
- Render & cladding joints
- Brickwork movement joints
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
When to call us in Botley
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
It’s worth asking for a quote if you see:
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
- Failed sealant between panels on a façade
- Joints with sealant missing in places
Schools such as Ley Hill School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- Whether the sealant suits the joint
- How the joint is cleaned and prepared
- How the colour is chosen
- What happens if the job turns out different
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
What affects the cost of external mastic
We quote each job individually. This is what makes a difference:
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- The number of rooms or windows
- Access and height
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
What we need to know
Before you ask for a quote, have a think about:
- Access, such as stairs, a lift or height
- Whether it has been sealed before
- Photos by email, if that is easy
- Where the job is, and your postcode
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 will explain what’s involved and give you a clear quote.
External mastic in Botley: local notes
Historic houses like Chenies Manor House (about 3.1 miles south-east) are a reminder that the area around Botley 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. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Amersham station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. For an older house near a landmark such as St George's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Botley is about 1 mile east of Chesham, in Buckinghamshire. From the centre of Botley to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our Buckinghamshire coverage runs to 263 places, and Botley is one of them. We also work in London, around 25 miles away.
Postcode districts we cover here for external mastic: HP5. If you need external mastic at a property on Botley Road, Broomstick Lane and Goose Acre or anywhere close by, we can help. If you are just outside Botley, we cover Tyler's Hill (1 mile south), Ley Hill (1 mile east), Lye Green (1 mile north), Orchard Leigh (1 mile north) and Bovingdon (2 miles north-east). We also work in nearby towns such as Aylesbury (13 miles north-west), High Wycombe (9 miles south-west), Marlow (13 miles south-west), Amersham (3 miles south-west), Beaconsfield (8 miles south-west) and Chalfont St Peter (7 miles south).
Local landmarks in Botley
We work in homes and buildings around Chesham Grammar School and The Crown pub, among other places. Botley’s nearest station is Amersham station, roughly 2.7 miles south-west of the centre. Nearby you will also find Amersham Hospital (3.7 miles south-west) and Hawridge Court (3.1 miles north-west). Open spaces near Botley include Sands Bank.
Botley questions
Can you do external mastic in Botley?
Yes. Our work covers London and the South East, and Botley is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Do you work for landlords with property near Amersham station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Can you reach joints on upper floors?
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.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
How long before the joint can be used?
It depends on the product. Before we leave, we’ll tell you the cure time.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
What the job involves on each surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so its sealant has to stay flexible.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.