Buckinghamshire · England
External & façade joints in Rowsham, Buckinghamshire
Problem with your movement joints in Rowsham? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Rigid filler in a joint that should flex
- Failed seals between different materials
- Joints with sealant missing in places
Quotes for external mastic in Rowsham
We quote each job individually. These are the things that affect it:
- The product the joint needs
- Any mould that needs treating
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Helping us quote
Photos help, but a description is a good start. Please mention:
- What’s wrong with the joints now
- How we’d reach the joints
- Where the job is, and your postcode
- The rough size of the job
For external mastic in Rowsham, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
External mastic in Rowsham, done properly
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you have rigid filler in a joint that should flex and old sealant gone brittle and cracked, we can put it right, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in Rowsham is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
We stand behind the work with a 12-month guarantee, so you’re covered after we have gone.
- Location
- Rowsham (HP22)
- Wider area
- Buckinghamshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Rowsham
What else we do in Rowsham
Outside joints around Rowsham
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Ascott House (about 3.8 miles north-east) are a reminder that the area around Rowsham has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you look after a building such as Wingrave Church of England Combined School, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Aylesbury station, split movement joints are easy to miss on a rental until damp shows inside. If you live in an older home near Church of All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Rowsham is about 3 miles north-east of Aylesbury, in Buckinghamshire. We carry out external mastic for homes and businesses in Rowsham and nearby, as part of our work across Buckinghamshire. 263 places in Buckinghamshire are on our list, from the larger towns to small villages. Oxford is on our list too, around 21 miles away.
All of HP22 is within our area for external mastic. Whether your property is on Bennetts Lane and Manor Road or a nearby road, our applicators can take on the job. Neighbouring places we cover for external mastic include Wingrave (1 mile north-east), Aston Abbotts (1 mile north), Bierton (2 miles south-west), Burcott (2 miles south) and Broughton (2 miles south). Within a short drive, we also cover Aylesbury (3 miles south-west), Chesham (12 miles south-east), Buckingham (14 miles north-west), Amersham (14 miles south-east), Elmhurst (3 miles south-west) and Southcourt (4 miles south-west).
Local landmarks in Rowsham
We work in homes and buildings around MacIntyre School. The nearest railway station is Aylesbury station, about 3.5 miles south-west of the centre. Other landmarks nearby include Bolbec Castle (3.6 miles north-west) and Tindal Centre (2.7 miles south-west).
Why it’s worth doing now in Rowsham
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Older cottages and farmhouses around Rowsham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why choose Mr Mastic in Rowsham
- A 12-month guarantee on all work
- Old sealant always removed completely
- Rated 4.9 stars on Google
- We are fully insured
See what affects the cost or our reviews.
Common questions in Rowsham
I let a flat near Aylesbury station. Can you help?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Will you come out to Rowsham?
Yes, Rowsham is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and you will get one quote.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
Are you insured?
Yes. We are fully insured.
Landlords, agents and businesses in Rowsham
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
If you manage several properties in or around Rowsham, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
Aftercare tips
To keep the joints looking good and working properly:
- Deal with leaking gutters that soak the joints below
- Ask before painting over external sealant
- Keep movement joints as flexible joints, not mortar
- Keep soil, plants and ivy away from the joints
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Different surfaces, different methods
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
What sealant work cannot fix
In fairness, some problems need a different trade:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
The process
Before we leave, we go over the finished joints with you. The visit itself normally takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. In a small place like Rowsham, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention any parking rules near the property
- Clear the area around the work
- Let us know about earlier repairs to the joints
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or send us an email.