Expansion joint sealing in Knowle
Expansion joint sealing in Knowle, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Brittle, chalky sealant on external joints
- Layers of sealant in a movement joint
- Expansion joints filled with dirt and stones
Expansion joint sealing for businesses in Knowle
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Do you need expansion joint sealing in Knowle?
Car park decks and floors face loads that walls never see. Wheel loads stress the sealant and the arrises. The product has to be suited to the traffic.
Things that typically lead to an enquiry:
- Damp inside where a wall movement joint has failed
- Expansion joints split through the centre of the bead
- Sealant peeling off one face of the joint
- Chipped joint edges on forklift routes
For a school such as Orchard Lea Infant School, playground and building joints can be done in the holidays.
Before you book anyone
- Will CSCS-carded applicators be on site?
- Their public liability cover
- Health and safety accreditation such as CHAS
- What site paperwork they can supply
How we handle expansion joint sealing in Knowle
Floor movement joints in warehouses, retail and public buildings carry wheeled traffic. Without a sound filler, joint edges chip and spall under load so the product has to suit both the traffic and the movement. We will tell you if the edges need repairing before sealing and phasing can keep areas working. We work on podiums and floor movement joints, car park decks and ramps and brickwork movement joints, and the failures we are asked to look at most are hardened, cracked sealant on exposed facades and leaks through car park deck joints onto the level below. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Knowle, preparation and product choice get the time they need.
In and around smaller places like Knowle, the concrete floors we see are often in converted farm buildings, small workshops and storage units. Whether it’s a farm store turned workshop or a storage unit, the joints need a product that suits the traffic.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we are clear about what is covered before work starts.
- Location
- Knowle (PO17)
- Region
- Hampshire
- Guarantee
- 12 months on every job
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Joints that move: notes for Knowle
Knowle sits in one of the drier corners of the country, the South East. Even so, yard and car park joints are only sealed when they’re dry and clean, and winter de-icing salt on car parks and ramps works into any open joint. At least three named trading, business or retail sites lie within about 3 miles of Knowle. Floors, loading bays and yards on sites like these are where floor and movement joints work hardest.
Hospitals like Knowle Hospital (to the north-east of Knowle) have multi-storey or surface car parks whose joints carry vehicles round the clock. Another example is Horseshoe Paddocks Business Centre, which lies south-west of Knowle, where floors and yards would be done in stages around the occupiers.
Knowle is about 2 miles north of Fareham, in Hampshire. Knowle sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Knowle is one of 723 places we cover in Hampshire for movement joints. Our Portsmouth page has more on work in that area (7 miles or so).
Commercial sites across PO17 are covered for movement joints. We cover commercial and managed buildings on Serotine Close, Boundary Walk and Park Approach. If your building is just outside Knowle, we cover Funtley (1 mile south), Tapnage (1 mile north-west), Heathfield (2 miles south), Segensworth (2 miles west) and Titchfield Park (2 miles south-west). Bigger towns within reach include Winchester (13 miles north), Gosport (6 miles south-east), Havant (10 miles east), Eastleigh (9 miles north-west), Horndean (9 miles east) and Totton (13 miles west).
What’s near Knowle
Recent enquiries here include premises near The Miners Arms and The Henry Cort Community College. The nearest railway station is Fareham station, roughly 2 miles south of the centre. Well-known places in the area include Portchester Castle (4.9 miles south-east) and Knowle Hospital (under half a mile north-east). For a walk, there’s Portsdown Hill and Swanwick Lakes.
Other services in Knowle
Maintenance after handover
Cleaning and maintenance staff play a part too. Pass these on to them:
- Act on the first tear or lifting edge rather than waiting
- Keep traffic off new joints until the cure time is up
- Clear dirt from joint lines during routine cleaning
- Include every elevation and deck joint in periodic inspections
Keep wheels, feet and water off new joints until the sealant has cured. How long that takes depends on the product, the temperature and the depth of the joint, and we confirm it for each area before we leave. Keeping the area coned off until then avoids tyre marks and damage.
A failed deck joint lets water straight through to the level below. That water often carries de-icing salts with it and it can affect the structure over time. Resealing early limits the damage.
General trades versus a specialist
For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Some joints are best left to specialists: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong typically costs more in the end than doing them right.
Surface by surface
Cladding panel joints
Access to cladding joints is agreed before the price is fixed. Close-up photos help us judge the joints.
Car park decks and ramps
Car park joints are some of the hardest-working joints in any building. We use a sealant made for wheel loads and the expected movement, phased so parts of the car park stay open.
What sealant work can’t fix
Some faults sit outside our scope, and we point that out rather than sealing over them:
- A joint that has to be widened or re-detailed before it can work
- Mechanical expansion joint covers, cover plates or proprietary joint systems (a specialist supplier’s job)
- Structural movement beyond what the joints were designed for (that needs a structural engineer)
Not sure which it is? You can ring 01277 525 020 or email drawings and photos and we will tell you honestly before you book.
Surfaces we seal
- Brickwork movement joints
- Podiums and floor movement joints
- Blockwork control joints
- Car park decks and ramps
- Cladding panel joints
- Precast concrete panel joints
Our process
We bring the products specified for the job, along with primers and backing rod. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. Smaller jobs around Knowle can be grouped with others nearby. A fixed quote is given before anything starts.
- We start with photos, approximate lengths and any drawings, visiting where needed.
- 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.
- Edges are checked, and we tell you if any need repairing before sealing.
- 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.
Preparing the site
- Agree which areas must stay open
- Arrange parking or a loading space
- Share your working hours and any access restrictions
Get a fixed quote
For a fixed quote, ring 01277 525 020 or email us with the site address and an outline of the work. You can also send details through our quote form.
Related advice
Knowle: questions and answers
Is Knowle too far out for you?
No. Small places get the same service as large ones. We work across Greater London and the South East. Send photos and a list of what needs doing, and we’ll plan the job to need as few trips as possible.
Is Knowle Village Business Park, near Knowle, within your area?
Yes, sites like Knowle Village Business Park are within our area, along with the rest of Knowle. A few photographs and the unit address let us price the work.
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 before quoting.
How soon can the area be used again?
That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.
What happens if it rains on the day?
Outside work depends on conditions: rain, frost and condensation all stop sealant bonding. Internal floor joints are far less affected.
Are you insured?
Yes. We’re fully insured, and the certificate can go with your quote.
Can you work on car park ramps and decks?
Yes. Let us know the opening hours and which levels or bays have to stay available and we’ll plan around them.