Hampshire · England
External & façade joints in Gundleton, Hampshire
Professional external mastic in and around Gundleton, with old sealant always removed completely and a 12-month guarantee.
- Leaking joints around cladding and façade panels
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
If you manage several properties in or around Gundleton, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
External mastic for homes and businesses in Gundleton
On houses, flats and commercial buildings across Gundleton, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean joint faces and the right depth. If you have movement joints filled with mortar instead of sealant and sealant pulling away from one side of the joint, we can put it right.
Somewhere as small as Gundleton, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Gundleton (SO24)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. It normally takes anything from a few hours to several days, depending on the building. Somewhere like Gundleton needs a little journey planning: let us know about lanes, gates and parking. 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.
How to prepare
- Tell us about any water getting in
- Keep children and pets away from the work area
- Move anything stored near the joints
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Read more
Gundleton questions
Do you cover smaller places like Gundleton?
Yes. Gundleton is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Gundleton for external mastic?
Yes, Gundleton is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces, primed where needed.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
How do I get a quote for external mastic in Gundleton?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Check the sealant is paintable before painting near it
- Deal with leaking gutters that soak the joints below
- Look over the joints every year, ideally after winter
- Point out the joints to other trades
Only paint over the joint if we have confirmed the sealant can take paint. Many exterior sealants are not designed to be painted and spoil the finish.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
Honest limits
Sealant isn’t the answer to every problem, and we’d rather say so up front. It will not solve:
- Structural movement, which needs a surveyor or engineer
- Cracking across the wall rather than at a joint
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, ring 0345 464 0079 or email us and we will say what we think before booking.
What we seal
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
What we’re called out for in Gundleton
If plants are growing out of a joint, the sealant has normally failed or was never there. Dirt and roots then trap moisture in the joint.
The most common problems we see are:
- Weeds or debris growing in open joints
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
- Leaking joints around cladding and façade panels
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.
What your quote should include
- What happens if the job turns out different
- What the quote includes, VAT included or not
- What product goes in the joint
- How long to leave it before use
External mastic in Gundleton: local notes
Historic houses like Hinton Ampner House (about 4 miles south) are a reminder that the area around Gundleton has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as Perins School, larger buildings have long runs of movement joint that eventually need resealing.
Gundleton is about 7 miles south-west of Alton, in Hampshire. Every kind of property in Gundleton can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Our Hampshire coverage runs to 683 places, and Gundleton is one of them. Our Southampton page covers work nearby (17 miles or so).
Postcode districts we cover here for external mastic: SO24. You’ll find streets such as Goscombs Lane and Bighton Lane, and we cover them all. Nearby, we also carry out external mastic in Bishop's Sutton (1 mile south-west), New Alresford (2 miles west), Bramdean (3 miles south), Hinton Ampner (4 miles south) and Cheriton (4 miles south-west). Further out, we also cover Basingstoke (12 miles north), Winchester (9 miles west), Eastleigh (13 miles south-west), Horndean (14 miles south), Chandler's Ford (14 miles south-west) and Alton (7 miles north-east).
Around Gundleton
Typical jobs here are in homes near Three Horseshoes Public House, among other places. Nearby you’ll also find Barton Castle (2.9 miles north). Open spaces near Gundleton include Shutts Copse and Red Hill.
Also near Gundleton
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Quotes for external mastic in Gundleton
We quote each job individually. These are the things that affect it:
- The old material and how stubborn it is
- Access and height
- The number of rooms or windows
- The size of the job
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 we need to know
You do not need to know the technical terms. Just tell us:
- How we’d reach the joints
- The problem you’ve noticed
- Photos by email, if that is easy
- Roughly how big the job is
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work.
DIY sealant or a professional job?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.