Expansion and movement joint sealing in St Mary's, Southampton
Planning work on a movement joint in St Mary's? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Expansion joints filled with dirt and stones
- Sealant peeling off one face of the joint
- Chipped joint edges on forklift routes
Need expansion joint sealing in St Mary's?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
How we handle expansion joint sealing in St Mary's
Mastic Doctor has sealed movement joints since 2005 for contractors, facilities managers and owners. Our applicators are CSCS-carded, we are CHAS accredited and a Constructionline member, and we carry five million pounds of public liability insurance. Workmanship is backed by our 12-month guarantee. We work on blockwork control joints, brickwork movement joints and podiums and floor movement joints, and the usual reasons a site gets in touch are water getting into the wall through a failed joint and joints where the bead has lost adhesion. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in St Mary's it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
In a smaller place such as St Mary's, floor and movement joints are often in agricultural and rural business units, schools and the odd small industrial yard. Concrete floors and yards in these buildings move and crack like any others.
A 12-month guarantee applies to all our work in Southampton. Should something we installed fail, ring 01277 525 020 or email us and we’ll come back to it.
- Location
- St Mary's (SO14, SO15, SO18)
- Region
- Southampton
- Cover
- 12 months on every job
- Price
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Your questions answered
Our building in St Mary's is near the coast: does that change the sealant?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. We check the specified product suits the exposure and pay close attention to preparation.
Is St Mary's too far out for you?
Not at all: smaller places are covered as well as towns. London and every South East county are within our area. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.
How long before the joints can be used?
We’ll confirm how long the chosen product needs to cure, and sign any area that should be left alone.
Will you just go over the old sealant?
No, never. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
What do you charge?
Every job gets its own fixed quote. To get one, call the office on 01277 525 020 or use the quote form.
Can you quote from photographs?
Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we’ll arrange a visit.
Can you fit around our working hours?
Mention the site’s hours and access windows in your enquiry, and we’ll plan around them. Our office runs Monday to Friday, 8am until 5pm.
Where floor joints take the most wear near St Mary's
The sea is no more than about 1 mile from St Mary's. Coastal yards and decks give their joints salt and wet weather to deal with, not just wheels, so it pays to keep them sealed. Rainfall across the South East, St Mary's included, is lower than in many parts of the UK. Outside joints in yards and car parks still have to be dry before sealing, and where de-icing salt is spread in winter, open joints let it in.
Campuses like Southampton Solent University (to the north-west of St Mary's) mix old and new buildings, with movement joints wherever they meet. Estates like Central Trading Estate (to the south-east of St Mary's) combine warehouse slabs, yards and loading bays, all with joints under wheels. A healthcare site such as Royal South Hants Hospital, 0.5 miles north of St Mary's, depends on car parks, ramps and service yards whose joints take traffic all day.
St Mary's is about 1 mile south of Southampton, in Southampton. Looking for expansion joint sealing in St Mary's? We can help, as we do across Southampton. St Mary's is one of 30 places we cover in Southampton.
Postcode districts covered here: SO14, SO15 and SO18 for movement joints. Among the streets we cover are New Road, Ogle Road and Marsh Lane, and sites on any of them can send details for a fixed quote. We also cover Northam (1 mile north-east), Inner Avenue (1 mile north), Peartree Green (1 mile east), Southampton (1 mile north) and Bitterne Manor (1 mile north-east) for movement joints. A short drive away, we cover Harefield (3 miles east), Maybush (3 miles north-west), Coxford (3 miles north-west), Lordswood (3 miles north-west), Mansbridge (3 miles north-east) and Redbridge (3 miles west).
Landmarks near St Mary's
In St Mary's, that means premises near The Joiners pub, Woolston School and Houndwell Park, among other places. St Mary's’s nearest station is Southampton Central station, roughly 0.8 miles west of the centre. Well-known places in the area include Netley Castle (2.5 miles south-east) and Bargate Guildhall Museum (under half a mile south-west). Not far away are Netley Common.
Nearby places to St Mary's
What else we do in St Mary's
Why act early in St Mary's
Sealing over a failed movement joint is a common shortcut. A bead over the old seal can’t bond or flex. Full removal and preparation is in every quote. Over time, UV, weather and movement wear any sealant out. Replacing it before it fails keeps water out.
The specified product makes a difference, and so does the preparation, such as cutting out, priming or new backing rod. Access, phasing and site requirements come into it too.
Why clients in St Mary's choose us
- Joints cleaned back to sound surfaces
- Standard and matched colours in many product ranges
- A Constructionline member, so easy to vet
- CHAS accredited contractor
Read our cost guide and our accreditations.
Looking after the joints
Your facilities or cleaning team can help the joints last. Share these points with them:
- Check joints after long freezing spells
- Keep racking legs and heavy point loads off floor joints
- Treat a small split as a warning, not a cosmetic issue
- Clear dirt from joint lines during routine cleaning
Movement joints belong on the planned maintenance inspection list. A periodic look picks up tears and lifting before water gets in, when they’re still cheap to deal with. Should you spot a problem, you can ring 01277 525 020 or use the quote form and send a picture.
Once debris packs a failed joint, the structure has nowhere to expand. The edges then take the pressure and start to spall. A sound seal keeps the joint working.
How the quote is worked out
There’s no standard rate for sealant work, since sites vary so much. What we look at:
- Induction, permit and paperwork requirements
- Phasing around occupants
- The total length or number of joints
- Whether old sealant has to be cut out first
Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
Details that help us quote
It doesn’t need to be a full survey. A few details are enough to get going:
- A wide shot and a close-up of the area
- Approximate linear metres or a joint schedule
- When you need the work done
- How the joints are reached, and at what height
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, ring 01277 525 020 or email a schedule or drawings.
Different surfaces, different methods
Internal floor movement joints
Warehouse and retail floors have saw-cut induced joints and construction joints. A semi-rigid filler is common in trafficked industrial floors.
Podium joints
Podium decks are exposed and often trafficked. We choose a product that copes with feet, wheels and weather.
Our process
Diagnose, treat, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. For a job in St Mary's, the main thing is a clear picture of the work. You will then get a fixed price for the work.
- Photos, joint lengths and drawings come to us, or we visit.
- Joint widths and expected movement are checked against what the sealant can take and tell you if the design looks wrong for the movement.
- Every joint is cleared of the failed seal and any grit packed into it.
- Any broken arrises or friable edges are flagged before work goes further.
- The right sealant goes in at the right depth, bonded to the two sides only.
- Each area is handed back after its cure time, under our 12-month guarantee.
Before we start on site
- Send your site hours and access windows
- Let us know about inductions and permits
- Have the specification and drawings to hand
Get a fixed quote
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, phone 01277 525 020 or email us.
Related advice
When something else is needed
We check first that sealant really is the fix. It won’t put right:
- Movement on a scale no sealant is meant to absorb
- Mechanical expansion joint covers, cover plates or proprietary joint systems (a specialist supplier’s job)
- Crumbling edges that would give a new bead nothing sound to grip
If in doubt, ring 01277 525 020 or email a schedule or drawings and we will say what we think before you book.
Joints and surfaces we work on
- Cladding panel joints
- Car park decks and ramps
- Podiums and floor movement joints
- Precast concrete panel joints
- Brickwork movement joints
- Blockwork control joints