Buckinghamshire · England
Owlswick External Mastic
External mastic for Owlswick and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Panel joints letting water in
- Movement joints filled with mortar instead of sealant
- Movement joints with cracked, split or missing sealant
When something else is needed
A few problems are outside what sealant work can do:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
What we seal
- Joints between brick and frames
- Façade panels
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
External mastic in Owlswick
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We work on concrete & block, joints between brick and frames and copings & trims, and the jobs we see most are cracked joints where brick meets render or frames and moss and dirt in joints with no sealant left.
Around Owlswick, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Where
- Owlswick (HP27)
- Wider area
- Buckinghamshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Owlswick
The quote reflects the job in front of us. We take into account:
- Access and height
- Mould in or behind the old joints
- When we can work, for business premises
- The type of sealant required
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email and we will talk you through it.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- The type of property
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- What’s wrong with the joints now
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before we start.
What happens on the day
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take anything from a few hours to several days, depending on the building. Somewhere as small as Owlswick, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job.
Related advice
Walls and rooflines in Owlswick
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.
For landlords with property near Monks Risborough station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Longwick Church of England Combined School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Owlswick is about 5 miles east of Thame, in Buckinghamshire. Every kind of property in Owlswick can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Owlswick is one of 263 places in Buckinghamshire where we work for external mastic. We also work in Oxford, around 16 miles away.
All of HP27 is within our area for external mastic. Nearby, we also carry out external mastic in Meadle (1 mile east), Longwick (1 mile south), Ilmer (1 mile west), Alscot (1 mile south-east) and Monks Risborough (2 miles south-east). We also work in nearby towns such as Aylesbury (5 miles north), High Wycombe (9 miles south-east), Chesham (11 miles east), Marlow (13 miles south), Amersham (12 miles south-east) and Beaconsfield (13 miles south-east).
Near you in Owlswick
We work in homes and buildings around Princes Risborough School and The Red Lion Public House, among other places. For rail, the closest station is Monks Risborough station, about 1.5 miles south-east. Nearby you will also find St John's Hospital (3.7 miles north) and Great Kimble Dial Hill (2.1 miles east). The countryside around Owlswick includes Beacon Hill and Brush Hill Local Nature Reserve.
Do you need external mastic in Owlswick?
Some movement joints have been pointed up with mortar by mistake. The joint cannot move, so the wall cracks somewhere else instead.
The most common problems we see are:
- Failed sealant between panels on a façade
- Joints with sealant missing in places
- Joints pointed up with cement by mistake
- Weathered mastic that no longer stretches
If you live in an older home near Owlswick Chapel, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Comparing quotes
- Whether you can choose the colour
- What happens if they find a problem under the old sealant
- How long to leave it before use
- How the surfaces are prepared before sealing
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How the job changes by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Other services in Owlswick
Looking after it afterwards
To keep the joints looking good and working properly:
- Make sure movement joints are not pointed over
- Keep soil, plants and ivy away from the joints
- Leave the joints unpainted unless we’ve said otherwise
- Show decorators and builders where the movement joints are
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Owlswick: your questions answered
Will you come out to Owlswick?
Yes. Owlswick 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.
I let a flat near Monks Risborough station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Where do you work from?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
How long does external mastic take?
It depends on the size of the job, but most jobs take a few hours to a few days, depending on the length of joint and the access. We will give you a better idea when we quote.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area.