Buckinghamshire · England
Saunderton External Mastic
External mastic in Saunderton from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking joints around cladding and façade panels
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
Landlord and commercial work in Saunderton
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured for the work.
External mastic in Saunderton, done properly
A movement joint is a deliberate break that lets a wall expand and contract. 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. If you have rain getting behind render or cladding at a joint and movement joints with cracked, split or missing sealant, we can help, on concrete & block, copings & trims and render & cladding joints alike.
In a village or hamlet like Saunderton, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
All of our work is guaranteed for twelve months.
- Where
- Saunderton (HP14)
- Wider area
- Buckinghamshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
The process
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access in most cases. In a small place like Saunderton, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Mention any tricky access
- Keep pets and children clear of the area while we work
- Clear the area around the work
How to get a quote
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Read more
What external mastic looks like in Saunderton
Historic houses like West Wycombe Park House (about 2.6 miles south) are a reminder that the area around Saunderton 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Church of St Paul, older walls, gutters and the joints where extensions meet them need a flexible sealant. Managing a site like Bledlow Ridge School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Saunderton is about 5 miles north-west of High Wycombe, in Buckinghamshire. Homes, rented property, offices and hotels in Saunderton is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Across Buckinghamshire, we cover 263 places, and Saunderton is one of them. You can also see our page for Reading, roughly 17 miles from Saunderton.
Jobs for external mastic in HP14 is quoted and booked the same way as anywhere else. Whether your property is on Wycombe Road, Saunderton Vale and Chiltern View or anywhere close by, our applicators can take on the job. Nearby, we also carry out external mastic in Saunderton Lee (1 mile north), Bledlow Ridge (1 mile west), Bradenham (1 mile south-east), Loosley Row (1 mile north) and Lacey Green (1 mile north-east). Within a short drive, we also cover Aylesbury (10 miles north), High Wycombe (5 miles south-east), Chesham (9 miles east), Marlow (7 miles south), Amersham (10 miles east) and Beaconsfield (9 miles south-east).
What’s near Saunderton
We work in homes and buildings around The Golden Cross pub. Saunderton has its own railway station: Saunderton station. A little further out are High Wycombe Castle (4.5 miles south-east) and Wycombe Hospital (4.6 miles south-east). Open spaces near Saunderton include Yoesden.
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
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.
Nearby places to Saunderton
What else we do in Saunderton
When to call us in Saunderton
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
Any of these means the joints need attention:
- Water getting into walls through failed joints
- Panel joints letting water in
- Hard, crazed mastic that has stopped moving
- Joints where the bead has come unstuck
Letting a property close to Saunderton station? Then split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- What insurance they hold
- The length of the guarantee
- What product goes in the joint
- Whether VAT is included
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out and protects the render itself.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Why it’s worth doing now in Saunderton
Sealing over the top of old mastic doesn’t hold for long. The new layer can’t bond properly to old, weathered material, so we always take the old sealant out. Around Saunderton, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Saunderton
- Tidy, careful work
- White, clear, grey or another colour, product permitting
- Sealant colour chosen to suit
- Colour agreed with you before work begins
Take a look at how sealant jobs are priced and what customers say.
Saunderton questions
Is Saunderton in your area for external mastic?
Yes. Our work covers London and the South East, and Saunderton is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Can you help a landlord with a rental near Saunderton station?
Yes. We work for letting agents and landlords as well as homeowners. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
How long does the job take?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer.
What should I tell you?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Are you fully insured?
Yes. We are fully insured for domestic and commercial work.
How often do external joints need resealing?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our one-year guarantee.
How do you reach high-level joints?
It depends on the height and the site. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
Is it messy?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Walk round the building once a year and look at the joints
- Keep movement joints as flexible joints, not mortar
- Point out the joints to other trades
- Keep high-pressure jets off the joints
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years.