Southampton · England
External & façade joints in Highfield, Southampton
We cover Highfield for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Leaking joints around cladding and façade panels
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
How we handle external mastic in Highfield
Low-level joints can usually be done from the ground. For joints higher up, give us some details of the building and we will confirm what access is needed. We work on brickwork movement joints, copings & trims and render & cladding joints, and people most often call us about rain getting behind render or cladding at a joint and rigid filler in a joint that should flex.
In a smaller place like Highfield, some homes face open ground, and walls and rooflines facing the weather take the worst of it. Joints on those sides are usually the first to go.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Highfield (SO17, SO16, SO14)
- Wider area
- Southampton
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Parking around Highfield is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
Ask for a quote
Want a quote for external mastic? Please call 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
Common problems we fix in Highfield
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
The most common problems we see are:
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
- Failed seals between different materials
- Weeds or debris growing in open joints
Homes close to Highfield Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before booking
- How long the guarantee is
- What happens if the job turns out different
- Is VAT in the price?
- How the surfaces are prepared before sealing
Can I do it myself?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
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.
How the job changes by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
What affects the cost of external mastic
Call for a quick quote. What matters most is:
- The number and length of the joints
- The old material and how stubborn it is
- How easy the joints are to reach
- Any mould that needs treating
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Helping us quote
What to tell us when you ask for a quote:
- If someone has resealed it before
- Whether it’s a home or a business
- Where the property is
- What’s wrong with the joints now
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.
Also near Highfield
What else we do in Highfield
FAQs for Highfield
Do you cover smaller places like Highfield?
Yes, Highfield is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near St Denys station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
What information do you need?
A short description and the location, plus photos if you have them. If we need more, we’ll ask.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used before we leave.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Pointing it stops it working, and the wall may crack nearby. A flexible sealant is the right fill.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
Do you use backing rod?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Avoid pressure-washing directly into sealant joints
- Tell anyone working on the walls about the movement joints
- Leave the joints unpainted unless we have said otherwise
- Keep water from gutters off the wall
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Walls and rooflines in Highfield
Highfield is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Highfield Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing. If you let a flat or house near St Denys station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Highfield is about 1 mile north of Southampton, in Southampton. Highfield gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. 40 places in Southampton are on our list.
Postcode districts we cover here for external mastic: SO17, SO16 and SO14. Whether your property is on Winn Road, Nile Road and The Avenue or a nearby road, our applicators can take on the job. Main roads around Highfield include the A3035. If you’re just outside Highfield, we cover Bassett (1 mile north-west), Shirley (2 miles west), Lordswood (2 miles north-west), Freemantle (2 miles south-west) and Coxford (2 miles west). We also work in nearby towns such as Thornhill (3 miles south-east), Harefield (3 miles east), Sholing (3 miles south-east), Woolston (3 miles south), Eling (4 miles west) and Rownhams (3 miles north-west).
Local landmarks in Highfield
We work in homes and buildings around Saint George Catholic Voluntary Aided College Southampton, Richard Taunton Sixth Form College and The Cowherds Inn and the streets around them. The closest station to Highfield is St Denys station, about 0.8 miles south-east. Well-known places in the area include Royal South Hants Hospital (1.2 miles south) and Marlands Shopping Centre (1.7 miles south). Not far away are Netley Common.
Landlord and commercial work in Highfield
We also work for property managers and facilities teams in Highfield and across Southampton. Several sites can be quoted together, and we are fully insured for the work.
We work for letting agents and landlords as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.