Hampshire · England
External & façade joints in Sandleheath, Hampshire
Problem with your movement joints in Sandleheath? We remove the old material, prepare the joints and seal them properly.
- Plants rooting in failed movement joints
- Water getting into walls through failed joints
- Sealant that has lost its bond to the brick or render
Keeping the joints in good condition
So the new joints stay in good condition:
- Check the sealant is paintable before painting near it
- Walk round the building once a year and look at the joints
- Have failed joints looked at early
- Fix overflowing gutters above sealed joints
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint, and paint can crack as the joint moves.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
External mastic in Sandleheath
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. Typical jobs include old sealant gone brittle and cracked and water getting into walls through failed joints, across brickwork movement joints, concrete & block and joints between brick and frames.
Outside joints can only be sealed when they’re dry, so work in Sandleheath is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Your job is guaranteed for a year, as with all our work.
- Place
- Sandleheath (SP6)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Sandleheath
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
We also work for property managers and facilities teams in Sandleheath and across Hampshire. We can quote a run of properties together, and we’re fully insured for the work.
What affects the quote in Sandleheath
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Access and height
- Working hours on commercial sites
- The number of rooms or windows
- Which sealant suits the joint
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
Every job is quoted individually. Simply ring 0345 464 0079 or email us and describe the job, and photos are welcome.
What else we do in Sandleheath
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Cracking across the wall rather than at a joint
- Structural movement, which needs a surveyor or engineer
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- Façade panels
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
Should I try it myself first?
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.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
FAQs for Sandleheath
Is Sandleheath in your area for external mastic?
Yes. We work across London and the South East, and Sandleheath is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
Do you cover smaller places like Sandleheath?
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.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides with primer where required.
I rent my home. Can I book you?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Do you work at height?
It depends on the building. Send us photos and a rough idea of the height and we will confirm how they can be reached safely.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we’re using and why.
Do you work for letting agents?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you.
Outside joints around Sandleheath
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Breamore House (about 3.1 miles north-east) nearby, there’s older building stock in the area around Sandleheath as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Schools such as The Burgate School and Sixth Form are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Sandleheath Uniting Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Sandleheath is in Hampshire. We carry out external mastic for homeowners, landlords and businesses in Sandleheath and the surrounding area. Sandleheath is one of 683 places in Hampshire where we work for external mastic. You can also see our page for Southampton, about 19 miles away.
Here we cover the SP6 postcode area for external mastic. Whether your property is on Elms Close, Main Road and Old Brickyard Road or anywhere close by, our applicators can take on the job. We also cover the places around Sandleheath: Ashford (1 mile east), Alderholt (1 mile south), Damerham (1 mile north-west), Rockbourne (2 miles north) and Broxhill (2 miles south-west). We also work in nearby towns such as Totton (14 miles east), Romsey (15 miles east), New Milton (14 miles south-east), Ringwood (6 miles south), Barton on Sea (15 miles south-east) and Ashley (14 miles south-east).
Landmarks near Sandleheath
A little further out are Fordingbridge Museum (1.5 miles east) and Godshill Castle Hill (2.7 miles east). For a walk, there’s Blashford Lakes.
How the visit works
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. Somewhere like Sandleheath 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.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
Surface by surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.