Southampton · England
External Mastic in Midanbury
Sealing brickwork movement joints, render, cladding and façade joints in Midanbury, with a 12-month guarantee on every job. Ask us for a quote.
- Plants rooting in failed movement joints
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
FAQs for Midanbury
Is external mastic in a coastal place like Midanbury any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Do you work for landlords with property near Bitterne station?
Yes. We work for landlords and agents as well as householders. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Can you seal joints between two different materials?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces, primed where needed.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Do you use backing rod?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
How long will you be here?
Typically it takes anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we will tell you how long to expect.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
External mastic in Midanbury, done properly
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what access is needed. Typical jobs include cracked joints where brick meets render or frames and weeds or debris growing in open joints, on copings & trims, joints between brick and frames and brickwork movement joints.
Around Midanbury, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks usually start at a gutter end, a garage door frame or where an extension meets the house.
Big or small, you get the same one-year guarantee in Midanbury and across Southampton.
- Location
- Midanbury (SO18, SO17, SO19)
- Wider area
- Southampton
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
When it isn’t the sealant
It helps to know what we can’t do:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Failed render or damaged cladding panels
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Joints between brick and frames
- Concrete & block
- Façade panels
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
Keeping the joints in good condition
So the new joints stay in good condition:
- Deal with leaking gutters that soak the joints below
- Act on the first splits you see
- Clear growth from the base of walls and joints
- Show decorators and builders where the movement joints are
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
Landlord and commercial work in Midanbury
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two.
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible in all weathers.
How it works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a smaller place like Midanbury, parking is seldom the issue; lanes, gates and long drives are worth mentioning. 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Tell us about any previous sealing or DIY attempts
- Mention any tricky access
Get a quote
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Related advice
Outside joints around Midanbury
Midanbury is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. With historic houses such as South Stoneham House (about 0.9 miles north-west) nearby, there’s older building stock in the area around Midanbury as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Managing a site like Bitterne Park School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Bitterne station? Then split movement joints are easy to miss on a rental until damp shows inside. Homes close to Church of Ascension include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Midanbury is about 1 mile east of Southampton, in Southampton. From the centre of Midanbury to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Southampton, we cover 40 places, Midanbury among them.
Here we cover the SO18, SO17 and SO19 postcode area for external mastic. We cover properties on Neva Road, Avon Road and Bond Road. Nearby, we also carry out external mastic in Bitterne Park (1 mile south-west), Townhill Park (1 mile north-east), Chartwell Green (1 mile north-east), Mansbridge (1 mile north) and Bitterne (1 mile south). Larger places within reach include Shirley (3 miles west), Regents Park (3 miles west), Maybush (4 miles west), Coxford (3 miles west), Freemantle (3 miles west) and Lordswood (3 miles west). Midanbury is among the bigger towns we cover in Southampton.
Landmarks near Midanbury
Around Midanbury, our work takes us to homes and buildings near Bitterne Park Hotel, Riverside Park and Townhill Junior School, among other places. The nearest railway station is Bitterne station, roughly 0.8 miles south-west. A little further out are Marlands Shopping Centre (2.3 miles south-west) and Netley Castle (3.4 miles south). Open spaces near Midanbury include Netley Common.
Nearby places to Midanbury
Other services in Midanbury
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- The type of sealant required
- The number and length of the joints
- Mould in or behind the old joints
- Whether the work is at height
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
What to tell us when you ask for a quote:
- The problem you’ve noticed
- If someone has resealed it before
- Pictures of the joints, sent by email
- Access, such as stairs, a lift or height
We quote each job on its own. Simply phone 0345 464 0079 or drop us an email and describe the job, and photos are welcome.
What happens if it’s left?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. In a smaller place like Midanbury, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why Midanbury clients choose us
- An ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
- Over 20 years’ experience
- 4.9 on Google from 180+ five-star reviews
Take a look at how sealant jobs are priced and customer reviews.