Northam expansion joint sealing
Expansion and movement joint sealing in walls, decks and floors in Northam and across Southampton. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Car park joints leaking onto vehicles below
- Joints packed with grit and debris
- Arrises breaking up along floor joints
Expansion joint sealing in Northam
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our expansion joint sealing in Northam
Few joints take as much punishment as those in a car park. Tyres load the edges, and de-icing salts and water work into any gap, so failed seals soon lead to leaks onto the level below and broken edges. We reseal deck and ramp joints with a trafficable sealant chosen for the movement, phasing bays so the car park can stay in use. We work on blockwork control joints, car park decks and ramps and podiums and floor movement joints, and what we’re called in for most is expansion joints split through the centre of the bead and debris jammed in movement joints. Most enquiries from Northam start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
In a smaller place such as Northam, 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.
We sign every job off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Where
- Northam (SO14, SO19, SO18)
- Wider area
- Southampton
- Guarantee
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Signs you need expansion joint sealing in Northam
When a bead pulls away from one face, it has lost adhesion. Poor preparation, a skipped primer, or sealant bonded to the back of the joint are typical reasons.
Things that typically lead to an enquiry:
- New sealant over old, now failing
- Water getting into the wall through a failed joint
- Weathered movement joint sealant that no longer flexes
- Debris jammed in movement joints
University campuses such as Solent University, 0.9 miles to the west of Northam, have car parks, paved walkways and building elevations with movement joints.
Questions to ask before you book
- How they handle RAMS and site documents
- Is the sealant right for the movement and the substrate?
- Can the work be phased to keep areas open?
- Whether their applicators hold CSCS cards
Towns and villages near Northam
More services for Northam
Doing it in-house
For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.
Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Expansion joint sealing in Northam: the local picture
Northam sits close to the coast, within about 2 miles. External movement joints in car parks, ramps and yards near the coast take salt and wind-driven rain on top of traffic, so a failed joint lets more in and the edges break up sooner. At about 69 miles from central London, Northam is within reach of the capital. Warehousing clusters around the motorways that ring and radiate from London, and their floor joints take forklift and pallet-truck traffic all day.
Across sites such as Central Trading Estate, 0.7 miles to the south-west of Northam, floor and movement joints can be sealed in phases so units keep working. A healthcare site such as Royal South Hants Hospital, 0.8 miles west of Northam, depends on car parks, ramps and service yards whose joints take traffic all day.
Northam is about 1 mile south-east of Southampton, in Southampton. Our applicators travel to Northam for work on movement joints, handled exactly as we handle every other area. 30 places across Southampton fall within our area, including Northam.
Anyone looking for expansion joint sealing in SO14, SO19 and SO18 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Among the streets we cover are Sea Road, Lumpy Lane and Cross Road, and sites on any of them can send details for a fixed quote. We also cover Peartree Green (1 mile south), Bitterne Manor (1 mile north), Itchen (1 mile south-east), St Mary's (1 mile south-west) and Bitterne (1 mile east). Further afield, our area takes in Regents Park (3 miles west), Maybush (3 miles north-west), Coxford (3 miles north-west), Lordswood (3 miles north-west), Millbrook (3 miles west) and Redbridge (4 miles west).
Local landmarks in Northam
Recent enquiries here include premises near Inspire Enterprise Academy, East Park and The Engineers Arms, among other places. The closest station to Northam is Bitterne station, about 0.6 miles north. Other landmarks nearby include Bitterne Local History Society Heritage And Research Centre (0.8 miles east) and Marlands Shopping Centre (1.2 miles west). For a walk, there’s Netley Common.
Our process
In a busy building, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed before the next one starts. If neighbouring businesses or buildings around Northam need work too, visits can be combined. Mention the building’s opening times and we’ll work within them.
- We assess the joints on site or from photos, noting widths and how each has failed.
- A fixed quote names the sealant we propose and its movement class.
- Phasing is agreed so decks, floors or entrances can stay in use where needed.
- We strip the old sealant or filler and prepare each face until it’s sound and dry.
- Backing rod or bond-breaker sets the depth, primer goes on where specified, and the sealant is applied and tooled.
- We check each joint with you, confirm the cure time and sign off under our 12-month guarantee.
Getting the site ready
- Arrange parking or a loading space
- Point out any areas we must not close
- Send asbestos survey details if the building is pre-2000
Get a fixed quote
Send us photos, drawings or a joint schedule and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.
Advice
Surface by surface
Joints between different materials
Some mixed-material joints suit a hybrid sealant. We pick the product for the materials and the movement.
Internal floor movement joints
Wheeled traffic chips floor joint edges that aren’t supported. The right filler or sealant for the traffic and movement protects them, and tell you if edges need repairing first.
What sealant work can’t fix
Part of a good diagnosis is knowing where sealant stops. We will tell you if the real problem is one of these:
- Damaged metal nosings or cover plates over a joint
- A joint that has to be widened or re-detailed before it can work
- Cracking or settlement that calls for an engineer’s assessment
If in doubt, call the office on 01277 525 020 or send details through our quote form and we will say what we think before you book.
Surfaces we seal
- Cladding panel joints
- Blockwork control joints
- Podiums and floor movement joints
- Car park decks and ramps
- Precast concrete panel joints
- Brickwork movement joints
Northam: questions and answers
Can you work at a site such as Bitterne Business Centre, by Northam?
Yes. Our area takes in Northam and its surroundings, with estates and business parks such as Bitterne Business Centre included. A few photographs and the unit address let us price the work.
Does the sea air around Northam change the choice of sealant?
It can. Coastal exposure works external joints harder than inland weather. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Is colour matching possible?
It depends on the product specified. Some ranges are wide, others limited, so we will confirm the colours available for the specified product with the quote.
What exactly is a movement joint?
The terms overlap a great deal. Both let materials grow and shrink with temperature, moisture and load while the sealant stops grit and water getting in.
Can you follow the specification on our project?
Yes. Send it with your enquiry, and we’ll price the work to it, flagging anything that needs clarifying.
What if there’s asbestos in the old mastic?
Asbestos is possible in some older mastics, particularly in buildings from before 2000. We check the asbestos register before cutting out old sealant in an older building, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.
How do you choose the sealant?
If the job is specified, we follow the specification. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
Quoting for work in Northam
Quotes vary with the job. It mainly depends on:
- How much there is to seal
- Induction, permit and paperwork requirements
- Access and working height
- The product specified
Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you will have a fixed figure to work with.
Sending details for a quote
A few photographs plus some basic facts will normally do. It helps to include:
- Drawings or a marked-up plan, if available
- Clear photos of the problem areas
- The site address and postcode
- Anything awkward about access or site hours
Need a figure for a tender or a budget? We will quote against your scope and drawings you can plan around. If you have questions first, give us a call on 01277 525 020 or send photos by email.