Hampshire · England
External Mastic in Corhampton
External mastic across Corhampton and nearby, with old sealant always removed completely and a 12-month guarantee.
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
External mastic in Corhampton, 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. We work on brickwork movement joints, concrete & block and render & cladding joints, and common reasons people get in touch are leaking joints around cladding and façade panels and damp patches traced to an open external joint.
In a village or hamlet like Corhampton, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Every job is covered by our 12-month guarantee.
- Where
- Corhampton (SO32)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
External mastic in Corhampton: local notes
With historic houses such as Hinton Ampner House (about 4.4 miles north) nearby, there’s older building stock in the area around Corhampton as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Corhampton Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Corhampton is about 7 miles north-west of Horndean, in Hampshire. We provide external mastic to homes and businesses in Corhampton and nearby, as part of our work across Hampshire. Our Hampshire coverage runs to 683 places, Corhampton among them. Our Southampton page covers work nearby (12 miles or so).
We cover every part of the SO32 postcode area for external mastic and the streets around it. That includes homes and businesses on De Port Heights, Warnford Road and Millside and the roads around them. We also cover Exton (1 mile north), Meonstoke (1 mile south), Brockbridge (1 mile south), Droxford (1 mile south) and Soberton (2 miles south). Further out, we also cover Winchester (10 miles north-west), Gosport (12 miles south), Havant (10 miles south-east), Eastleigh (9 miles west), Fareham (9 miles south) and Horndean (7 miles south-east).
Local landmarks in Corhampton
Typical jobs here are in homes near The Shoe Inn. The countryside around Corhampton includes Beacon Hill and St Clair's Meadow.
Corhampton: your questions answered
Will you come out to Corhampton?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is there a guarantee on external mastic in Corhampton?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Will the old sealant be removed?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Can a movement joint be filled with mortar?
No. Rigid materials can’t move with the wall, so the joint stops doing its job. If it has already been filled, we can usually cut it out and reseal it.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
How do I get a quote for external mastic in Corhampton?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we’ll talk you through it.
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the damage spreads beyond the joint. Around Corhampton, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. We’ll send you a clear quote for the lot.
What you get with us
- A sealant colour to suit the surroundings
- Old sealant always removed completely
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
How it works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours for a handful of joints, longer for a whole elevation. In a small place like Corhampton, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
- Tell us about any water getting in
Get a quote
We quote each job on its own, so start by telling us what you need. Simply ring 0345 464 0079 or email us and describe the job.
Read more
Can I do it myself?
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.
A DIY attempt does not rule out a professional job. We cut it out and start again.
When something else is needed
To be straight with you, some problems need a different trade:
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
- Adding movement joints to masonry that has none
If in doubt, call 0345 464 0079 or email us and we will say what we think before you book.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Copings & trims
What affects the quote in Corhampton
We do not publish a price list, because jobs vary so much. What we look at:
- When we can work, for business premises
- The old material and how stubborn it is
- Any mould that needs treating
- The type of sealant required
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.
What we need to know
There’s no need for technical detail. Just tell us:
- Any access issues, like height or stairs
- The address or postcode of the job
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Landlords, agents and businesses in Corhampton
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Also near Corhampton
Also in Corhampton
Signs you need external mastic in Corhampton
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Signs it’s time to call us include:
- Rigid filler in a joint that should flex
- Rain getting behind render or cladding at a joint
- Joints with sealant missing in places
- Hard, crazed mastic that has stopped moving
Schools such as Meonstoke Church of England Infant School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- How the surfaces are prepared before sealing
- What insurance they hold
- Is the old sealant removed completely?
- Whether you can choose the colour