Expansion and movement joint sealing in St Leonards, Hampshire
Expansion joint sealing in St Leonards, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Joints packed with grit and debris
- Rain penetration at brick or block movement joints
- Chipped joint edges on forklift routes
Need expansion joint sealing in St Leonards?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Expansion joint sealing for commercial buildings in St Leonards
Every structure moves a little, all the time: they expand in the heat, shrink as they dry, and shift under load. Expansion and movement joints are built in so the structure can move without cracking. Mastic Doctor reseals movement joints in brickwork, blockwork, concrete, cladding and floors. If you’re dealing with joints where the bead has lost adhesion and debris jammed in movement joints, we can put it right. For commercial sealant work in St Leonards, you deal with one contact from quote to sign-off, whether it’s one building or several.
Around places the size of St Leonards, joints that need sealing tend to be in rural business units, farm buildings put to commercial use, schools and community buildings. Concrete floors and yards in these buildings move and crack like any others.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Where
- St Leonards (BH24)
- Region
- Hampshire
- Cover
- 12 months on our workmanship
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Where floor joints take the most wear near St Leonards
St Leonards is in the South East, one of the UK’s drier regions. External joints still wait for dry conditions, while winter salting gets into any joint left open. St Leonards has at least three named business or industrial parks inside a 3-mile radius. Floors, loading bays and yards on sites like these are where floor and movement joints work hardest.
For a school such as St Ives Primary & Nursery School, playground and building joints can be done in the holidays. If you manage units on an estate such as Ashley Heath Industrial Estate, 1.4 miles to the north-west of St Leonards, the floor joints under forklifts and pallet trucks and the slab joints in the yard are the ones to watch.
St Leonards is in Hampshire. Looking for expansion joint sealing in St Leonards? We can help. Our Hampshire coverage takes in 723 places, from busy centres to rural villages. There’s a separate page for Southampton, about 21 miles away.
Business premises anywhere in BH24 are within our area for movement joints. Streets here include Cedar Avenue, Birch Close and Malmesbury Road, and sites on any of them can send details for a fixed quote. Close to St Leonards, our area also takes in Ashley Heath (1 mile north), St Ives (1 mile north-east), Matchams (1 mile south-east) and Avon Castle (2 miles east). A short drive away, we cover Lymington (14 miles east), New Milton (10 miles south-east), Ringwood (3 miles north-east), Barton on Sea (10 miles south-east), Ashley (10 miles south-east) and Milford on Sea (13 miles south-east).
Near you in St Leonards
We work on buildings around Avon Heath Country Park, among other places. Nearby you will also find St Leonard's Hospital (0.9 miles south-west) and Stapehill Abbey (3.9 miles south-west). Open spaces near St Leonards include Linbrook Lake and Blashford Lakes.
Signs you need expansion joint sealing in St Leonards
When the movement exceeds the sealant’s capability, the bead tears. A joint that’s too narrow for the movement, or a product with the wrong movement class, will split through the middle. The same product in the same joint tends to fail again.
Look out for the following:
- Expansion joints filled with dirt and stones
- Expansion joints split through the centre of the bead
- Chipped joint edges on forklift routes
- Sealant pulling off the joint face
Hospital campuses such as St Leonards Hospital, 0.9 miles south-west of St Leonards, grow in stages, leaving movement joints wherever new blocks meet old.
What your quote should include
- Whether old or failed sealant will be cut out, not overlaid
- How joint depth will be controlled
- Will CSCS-carded applicators be on site?
- How they handle RAMS and site documents
What sealant work can’t fix
A few problems need another trade or a different fix, and we point that out rather than sealing over them:
- Changing the joint layout or spacing of a structure
- Leaks coming from the membrane rather than the joint seal
- Structural movement beyond what the joints were designed for (that needs a structural engineer)
If you’re not sure, just ring 01277 525 020 or email drawings and photos and we will give you a straight answer.
Surfaces we seal
- Precast concrete panel joints
- Podiums and floor movement joints
- Brickwork movement joints
- Cladding panel joints
- Car park decks and ramps
- Blockwork control joints
Maintenance after handover
After handover, a little attention goes a long way:
- Inspect movement joints alongside other routine building checks
- Keep traffic off new joints until the cure time is up
- Keep product details with the building records for the next reseal
- Raise snow-clearing blades over deck joints where possible
Snow ploughs and scrapers catch on joint lines. Lifting the blade at each joint avoids tearing the bead.
Rain gets into walls through torn brick and block movement joints. The first sign is often a damp patch indoors. Resealing promptly prevents internal damage.
On site: what to expect
We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. With the paperwork done, we take the joints in the sequence agreed with you. Several jobs near St Leonards can be grouped on one trip. Mention the building’s opening times and we will work within them.
- The first job is to check each joint: how wide it is, how it moves and why the old seal let go.
- You get a fixed quote with the product and its movement capability stated.
- The failed seal is removed and both faces are cleaned until sound and dry, and we tell you if any edges need repairing first.
- We control the depth with backing rod or, in shallow joints, bond-breaker tape.
- After any primer the maker requires, the bead is applied and tooled so it grips two sides only.
- We check every joint before sign-off, and the work carries our 12-month guarantee.
Preparing the site
- Share the asbestos register for older buildings
- Let building users know which areas are affected
- Flag any permit to work we’ll need
Get a fixed quote
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.
Read more
Leave it or put it right?
Combining joint work with other maintenance reduces set-up costs. But joints already letting water in shouldn’t wait for a programme. Urgent joints now, the rest later, is often the sensible plan. A failed joint lets water into a building whatever its size. Catching it early means a reseal rather than repairs.
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.
Why clients in St Leonards choose us
- A fixed quote before work starts
- Our applicators hold CSCS cards
- RAL and finish matching where the product range allows
- One phone line for London, the South East and Scotland
Read what affects the cost and our accreditations.
FAQs: St Leonards
Would you work within a site like St Leonards Hospital?
Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Is a smaller place like St Leonards outside your area?
No. Small places get the same service as large ones. London and every South East county are within our area. Send photographs and a list of what needs doing, and we’ll plan the job to need as few trips as possible.
Are you insured?
Yes. Mastic Doctor is fully insured, public liability included.
Do you seal on top of existing sealant?
No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.
Can the building stay open while you work?
Typically, yes. We phase the work so most of the building stays in use.
Is any job too small?
Small jobs are welcome alongside larger packages. Photos and a description are enough to start.
What exactly is a movement joint?
Put simply, it’s a planned break in a wall, slab or deck so the materials can move. Many people call it an expansion joint.
Different surfaces, different methods
Car park decks and ramps
Deck and ramp joints take tyre loads, grit and de-icing salts. A trafficable sealant suited to the movement goes in, phased so parts of the car park stay open.
Joints between different materials
Some mixed-material joints suit a hybrid sealant. The choice depends on the substrates and how much the joint moves.