Southampton · England
External & façade joints in Hounsdown, Southampton
External mastic across Hounsdown and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
- Sealant pulling away from one side of the joint
About our external mastic in Hounsdown
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. If you have damp patches traced to an open external joint and failed seals between different materials, we can put it right, on copings & trims, joints between brick and frames and concrete & block alike.
Around Hounsdown, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
Each job carries a 12-month guarantee.
- Where
- Hounsdown (SO40)
- Wider area
- Southampton
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. For a job in Hounsdown, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- 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.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know about parking restrictions
- Clear the area around the work
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or send us an email.
Advice
Walls and rooflines in Hounsdown
Hounsdown 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. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Colbury Christ Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Totton station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Hounsdown School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Hounsdown is about 1 mile south of Totton, in Southampton. From the centre of Hounsdown to the outskirts, external mastic is available for homes and businesses alike. Our Southampton coverage runs to 40 places, Hounsdown among them.
We cover every part of SO40 for external mastic. External mastic is available to properties on Main Road, Pound Lane and Chapel Lane and the roads around them. Neighbouring places we cover for external mastic include Ashurst Bridge (1 mile north-west), Totton (1 mile north), Netley Marsh (1 mile north-west), Woodlands (2 miles west) and Winsor (3 miles north-west). Larger places within reach include Southampton (5 miles east), Shirley (3 miles east), Regents Park (3 miles east), Townhill Park (6 miles east), Midanbury (6 miles east) and Thornhill (7 miles east).
What’s near Hounsdown
Around Hounsdown, our work takes us to homes and buildings near Foxhills Infant School and The Forest Inn. For rail, the closest station is Totton station, about 1.1 miles north-east of the centre. Nearby you will also find National Dairy Museum (0.8 miles south) and Ashurst Hospital (1.4 miles south-west). Not far away are Testwood Lakes.
Nearby places to Hounsdown
Also in Hounsdown
Why deal with it now?
Resealing a run of joints in one go is generally better than patching one at a time. They’ve weathered the same way. In an older home around Hounsdown, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What you get with us
- Trusted Arbo and Everbuild sealants
- Old sealant always removed completely
- Domestic, commercial and hotel work
- More than 20 years in sealant work
Read our cost guide or what customers say.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
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.
When it is not the sealant
We will always be straight with you, so here’s what new sealant won’t do:
- Failed render or damaged cladding panels
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp that is not coming from the joint
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before you book.
Surfaces we seal
- Concrete & block
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
Questions from Hounsdown
Does the coastal weather in Hounsdown affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Hounsdown?
Yes. Hounsdown is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages to suit the site.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint before we leave.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
Can you do several jobs on one visit?
Yes, we can. More than one area can be quoted together.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back, so the joint can move.
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and helps it last.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best.
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether the work is at height
- The old material and how stubborn it is
- When we can work, for business premises
- How much there is to do
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Where the job is, and your postcode
- Whether it has been sealed before
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
If you’re in Hounsdown and need external mastic, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.