Hampshire · England
External & façade joints in Lower Swanwick, Hampshire
Problem with your movement joints in Lower Swanwick? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Old sealant gone brittle and cracked
- Gaps where render, brick and frames meet
- Panel joints letting water in
How we handle external mastic in Lower Swanwick
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. Typical jobs include plants rooting in failed movement joints and leaking joints around cladding and façade panels, on façade panels, brickwork movement joints and concrete & block.
Outside joints can only be sealed when they’re dry, so work in Lower Swanwick is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
There’s a 12-month guarantee on every job, large or small.
- Location
- Lower Swanwick (SO31)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the problem grows beyond the joint itself. In a small place like Lower Swanwick, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why Lower Swanwick clients choose us
- Trusted Arbo and Everbuild sealants
- Fully insured
- 180+ five-star Google reviews
- Anti-fungal sanitary silicone in wet areas
Take a look at how sealant jobs are priced or our reviews.
Should I try it myself first?
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.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Walls and rooflines in Lower Swanwick
Lower Swanwick is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. 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.
If you live in an older home near Church of St Leonard, an extension built onto an older house moves differently, and the joint between them takes the strain. For site and facilities teams at buildings such as Bursledon Church of England Infant School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Lower Swanwick is about 2 miles west of Whiteley, in Hampshire. Whether you’re in the middle of Lower Swanwick or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. We cover 683 towns and villages across Hampshire, large and small.
All of SO31 is within our area for external mastic. We cover properties on Green Lane, Bridge Road and Station Road. If you’re just outside Lower Swanwick, we cover Swanwick (1 mile south-east), Sarisbury (1 mile south-east), Sarisbury Green (1 mile south), Park Gate (2 miles south-east) and Burridge (2 miles east). Larger places within reach include Winchester (12 miles north), Gosport (8 miles south-east), Havant (14 miles east), Eastleigh (6 miles north), Fareham (5 miles south-east) and Horndean (13 miles east).
What’s near Lower Swanwick
Locally, jobs take us to homes and businesses close to Brookfield Community School and Language College and The Old Ship Inn and the streets around them. There’s a railway station in Lower Swanwick itself: Bursledon station. Nearby you’ll also find St Andrew's Castle (2.4 miles south) and Bursledon Brickworks Industrial Museum (under half a mile north-east). The countryside around Lower Swanwick includes Swanwick Lakes.
Also in Lower Swanwick
Your questions about external mastic in Lower Swanwick
Will you come out to Lower Swanwick?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is external mastic in a coastal place like Lower Swanwick any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Can you seal joints between render and window frames?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
What does external mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
What is a movement joint?
A vertical gap in a long brick wall is usually a movement joint. It lets the bricks expand without cracking.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. For a village or hamlet like Lower Swanwick, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Mention any tricky access
- Keep children and pets away from the work area
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details and send pictures if you have them.
Related advice
Surface by surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so neither cracks the other.
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out.
Honest limits
We will always be straight with you, so here’s what sealant cannot fix:
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
- Damp that isn’t coming from the joint
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Façade panels
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
What we are called out for in Lower Swanwick
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
People usually contact us after spotting one of these:
- Movement joints filled with mortar instead of sealant
- Panel joints letting water in
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
If you let a flat or house near Bursledon station, outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before booking
- Are they insured?
- What guarantee comes with the work
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.