Expansion joint sealing in Portsmouth
Sealant work in Portsmouth for main contractors, managing agents and facilities managers: expansion and movement joint sealing in walls, decks and floors, with a fixed quote first.
- Leaks through car park deck joints onto the level below
- Debris jammed in movement joints
- Layers of sealant in a movement joint
Expansion joint sealing across Portsmouth
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Commercial clients in Portsmouth
For main contractors, we work as the sealant subcontractor. Programme, specification and site rules come first.
Building owners and managing agents use us on everything from one building to a spread of sites around Portsmouth. Several sites can go on one quote, which keeps the paperwork simple.
Expansion joint sealing in Portsmouth
A movement joint only works while its seal does. When the sealant splits or lets go, the gap fills with dirt and water, the joint can’t close properly and its edges begin to crumble. Dealt with early, it stays a sealant job rather than a concrete or masonry repair. We work on precast concrete panel joints, blockwork control joints and cladding panel joints, and what we’re called in for most is water getting into the wall through a failed joint and brittle, chalky sealant on external joints. A single leaking joint is often how a building in Portsmouth first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Work on floor and movement joints in a large place such as Portsmouth is normally phased: one aisle, bay or level at a time.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Where
- Portsmouth (PO6, PO4, PO1, PO2)
- Wider area
- Portsmouth
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Page updated
- 3 November 2026
When to call us in Portsmouth
Some joints were never sealed with the right product. A stiff or general-purpose sealant across a joint with large movement won’t cope. Movement capability is set out in BS EN ISO 11600, and specifications often refer to it.
Most enquiries start with one or more of the following:
- Expansion joints filled with dirt and stones
- Previous reseals laid over old sealant
- Joints where the bead has lost adhesion
- Water getting into the wall through a failed joint
Sites like St James Hospital, 1.6 miles to the south-east of Portsmouth, carry ambulances, deliveries and visitors’ cars over their road and deck joints.
What to look for in a quote
- Health and safety accreditation such as CHAS
- Is the sealant right for the movement and the substrate?
- Their plan for phasing and protecting the area
- How they handle RAMS and site documents
How a job runs
Working in a building that stays open takes some planning. The work area is signed and kept contained, keep walkways clear and move on in phases so staff and visitors can carry on around us. In a large town like Portsmouth, work on busy buildings is planned area by area, keeping disruption low. Photos and drawings let us propose a sequence with the quote.
- Photos, joint lengths and drawings come to us, or we visit.
- We compare each joint’s width with the movement and the sealant’s capability, and flag anything that needs an engineer.
- Every joint is cleared of the failed seal and any grit packed into it.
- Edges are checked, and we tell you if any need repairing before sealing.
- A sealant suited to the movement and traffic is laid to depth and tooled.
- Areas reopen once cured, and the work carries our 12-month guarantee.
Getting the site ready
- Share the asbestos register for older buildings
- Tell us your opening times and when work is allowed
- Point out any areas we must not close
Quotes
For a fixed quote, give us a call on 01277 525 020 or email a schedule or drawings, telling us the site location and the nature of the job. You can also send details through our quote form.
Related advice
When to bring in a specialist
Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
Questions we’re asked in Portsmouth
Is a hospital such as St James Hospital somewhere you can work?
Yes, provided the work is planned with the site’s estates team. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Does your area include sites such as Victory Retail Park, near Portsmouth?
Yes. Estates, retail parks and business parks around Portsmouth, Victory Retail Park among them, are all within reach. Send details of the unit and the work through our quote form for a quick quote.
Do you take on multi-site work?
Yes. Several buildings can share a single quote, and you deal with one contact throughout.
Will you quote for a small job?
Whatever the size, the process is the same: details, then a fixed price, then sealing, then a 12-month guarantee.
Will your applicators have CSCS cards?
Yes. We use CSCS-carded applicators, as many construction sites ask for.
Is Portsmouth in your area?
Yes. We cover Portsmouth, and the simplest way to start is to ring 01277 525 020 or send details through our quote form.
Why has the sealant in our expansion joints split?
The way it has failed typically tells us why: tearing down the centre means too much movement, and lifting off one side means poor adhesion. Broken edges are a third possibility.
What we can’t put right
Some faults sit outside our scope, and we point that out rather than sealing over them:
- Structural movement beyond what the joints were designed for (that needs a structural engineer)
- Leaks coming from the membrane rather than the joint seal
- Crumbling edges that would give a new bead nothing sound to grip
Not sure which it is? You can phone 01277 525 020 or email us and we will tell you honestly before you book.
Joints and surfaces we work on
- Precast concrete panel joints
- Brickwork movement joints
- Car park decks and ramps
- Cladding panel joints
- Podiums and floor movement joints
- Blockwork control joints
Other services in Portsmouth
Surface by surface
Joints between different materials
Junctions between brick and render, or concrete and cladding, move independently. We choose a sealant that grips both faces, with primer where specified.
Car park decks and ramps
Deck and ramp joints take tyre loads, grit and de-icing salts. We use a sealant made for wheel loads and the expected movement.
Slabs, ramps and loading bays in Portsmouth
The sea is no more than about 1 mile from Portsmouth. Coastal yards and decks give their joints salt and wet weather to deal with, not just wheels, so a failed joint lets more in and the edges break up sooner. At least three named trading, business or retail sites lie within about 3 miles of Portsmouth. Sites like these are full of saw-cut floor joints, yard slabs and car park joints.
Schools like Manor Infant School often have long brick elevations with movement joints that age quietly. Another example is Copnor Bridge Business Centre, which lies east of Portsmouth, where floors and yards would be done in stages around the occupiers.
Portsmouth is in England. We send applicators to Portsmouth for movement joints. We work across 19 places in Portsmouth, large and small.
Work on movement joints is covered throughout PO6, PO4, PO1 and PO2, whatever the building. For a building on Church Road, April Square and Rudmore Square or nearby, we can quote for movement joints. Portsmouth sits on or close to the A3 and A27. Sites close to Portsmouth are covered too, including Rudmore (1 mile north-west), Landport (1 mile south-west), North End (1 mile north), Fratton (1 mile south-east) and Kingston (1 mile south-east). Nearby towns on our patch include Wymering (3 miles north), Paulsgrove (3 miles north), Drayton (3 miles north-east) and Farlington (3 miles north-east).
What’s near Portsmouth
Around Portsmouth, our work takes us to commercial buildings near The Portsmouth Academy, Alexandra Park and St Edmund's Catholic School. For rail, the closest station is Fratton station, roughly 0.9 miles south of the centre. Other landmarks nearby include Royal Portsmouth Hospital (0.7 miles south-west) and Charles Dickens Birthplace Museum (less than half a mile west). The countryside around Portsmouth includes Milton Locks and Portsdown Hill.