Hampshire · England
External Mastic in Bishop's Sutton
External mastic across Bishop's Sutton and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Sealant pulling away from one side of the joint
- Joints pointed up with cement by mistake
- Old sealant gone brittle and cracked
About our external mastic in Bishop's Sutton
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where a rigid filler would soon crack. If you have hard, crazed mastic that has stopped moving and failed seals between different materials, we can put it right.
Older homes in small places like Bishop's Sutton may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Bishop's Sutton (SO24)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Common problems we fix in Bishop's Sutton
Sometimes a movement joint was filled with mortar or a rigid filler. The joint cannot move, so the wall cracks somewhere else instead.
Look out for any of the following:
- Moss and dirt in joints with no sealant left
- Joints with sealant missing in places
- Panel joints letting water in
- Failed seals between different materials
For an older house near a landmark such as Church of St Nicholas, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before booking anyone
- Whether they seal over old material or remove it
- What happens if the job turns out different
- How the joint is cleaned and prepared
- The length of the guarantee
What affects the quote in Bishop's Sutton
The quote reflects the job in front of us. We take into account:
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- The type of sealant required
- Access and height
Doing several joints on one visit usually makes better use of the time than several visits. You’ll get one clear quote for the whole job.
What to tell us for a quote
When you call or email, it’s useful to know:
- The rough size of the job
- The type of property
- How we’d reach the joints
- Pictures of the joints, sent by email
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Also near Bishop's Sutton
More services for Bishop's Sutton
Work for landlords, hotels and businesses
If you manage several properties in or around Bishop's Sutton, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
Walls and rooflines in Bishop's Sutton
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. With historic houses such as Hinton Ampner House (about 2.9 miles south) nearby, there’s older building stock in the area around Bishop's Sutton as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Managing a site like Perins School? Then its movement joints, gutters and trims need looking after like any other building’s.
Bishop's Sutton is about 8 miles south-west of Alton, in Hampshire. Bishop's Sutton gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 683 towns and villages across Hampshire, large and small. For nearby work, see our Southampton page.
Work in SO24 works the same way as everywhere else we cover. Whether your property is on North Street, Home Close and Water Lane or anywhere close by, we can help. Neighbouring places we cover for external mastic include Gundleton (1 mile north-east), New Alresford (2 miles west), Bramdean (2 miles south), Hinton Ampner (3 miles south) and Cheriton (3 miles south-west). Within a short drive, we also cover Basingstoke (13 miles north), Winchester (8 miles west), Eastleigh (12 miles south-west), Horndean (13 miles south-east), Chandler's Ford (13 miles south-west) and Alton (8 miles north-east).
What’s near Bishop's Sutton
In Bishop's Sutton, that means homes and buildings near Ship Inn. A little further out are Barton Castle (3.8 miles north). For a walk, there’s Shutts Copse and Red Hill.
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Cracking across the wall rather than at a joint
- Cutting new joints into brickwork, which is building work rather than sealant work
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Bishop's Sutton
- Brickwork movement joints
- Concrete & block
- Façade panels
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
Surface by surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it so the sealant is not too deep.
Questions from Bishop's Sutton
Do you cover Bishop's Sutton for external mastic?
Yes. Our work covers London and the South East, and Bishop's Sutton is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Is there a guarantee on external mastic in Bishop's Sutton?
All our work, in Bishop's Sutton and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. We will talk through colour options before any work starts, matched as closely as the range allows.
How often do external joints need resealing?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Are you insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
How it works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere like Bishop's Sutton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
Getting ready for the visit
- Tell us about any water getting in
- Mention any parking rules near the property
- Keep pets and children clear of the area while we work
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or send us an email with the details.