The Mastic Doctor team standing beside their branded vans outside an office building
Hampshire · England

Northney floor joint sealing

Floor joint sealing and filling in warehouses, factories and industrial units across Northney, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Scruffy, dirty joint lines on a shop or showroom floor
  • Joint edges breaking up under truck wheels
  • Flexible sealant torn out by wheels
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Floor joint sealing for Northney sites

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

About our floor joint sealing in Northney

We diagnose the floor first rather than guessing at a product: how wide the joints are, signs of ongoing movement, the wheel types crossing them and the state of the arrises. From that we choose between a semi-rigid filler and a more flexible sealant and the answer can differ from one zone to the next. We work on saw-cut induced joints, retail and showroom floors and joints along racking aisles, and the usual reasons a site gets in touch are saw-cut joints left open and packed with grit and joint fill separating from the concrete. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Northney is the same: the right product in a properly prepared joint.

In and around smaller places like Northney, 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.

We stand by our work: 12 months, guaranteed. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.

Place
Northney (PO11)
Wider area
Hampshire
Guarantee
12 months on our workmanship
Quotes
Quoted before any work starts
Telephone
01277 525 020
Last updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Site staff or a sealant specialist?

General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

Some joints are best left to specialists: for instance 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.

Honest limits

Before quoting, we check that sealant is the right answer. It won’t put right:

  • Cracks across panels caused by settlement or overload
  • Slab panels that rock or move under load
  • A failing floor coating, which is a flooring contractor’s job

Not sure which it is? You can give us a call on 01277 525 020 or email us and we’ll tell you honestly.

Surfaces we seal

  • Retail and showroom floors
  • Construction joints
  • Saw-cut induced joints
  • Loading bays
  • Joints along racking aisles
  • Forklift and pallet-truck routes

What happens if it’s left?

Not every joint needs stripping out completely. If old material is sound on one face and only a fine gap has opened, it may not all have to come out and the quote shows which approach suits each run. Halls, stores and units around places like Northney may not be checked every day, which gives a failed joint time to do damage. Resealing early avoids that.

The price depends on how many linear metres there are, what has to come out first and the access. Call for a fixed quote once you have the details.

Why choose Mastic Doctor in Northney

  • Products installed to the manufacturer’s instructions
  • A Constructionline member, so easy to vet
  • CSCS-carded applicators
  • Workmanship guaranteed for 12 months

Read how commercial sealant jobs are priced or our accreditations.

Traffic, movement and joints around Northney

With the shore within about 1 mile, Northney counts as a coastal location. Near the sea, external slabs, ramps and decks see salt air and driven rain as well as their usual loads, and edges left open tend to break up faster. The South East is one of the drier parts of the UK. External joints still wait for dry conditions, and gritting in cold spells finds its way into open joints.

Another example is Solent Retail Park, which lies north-west of Northney, where floors and yards would be done in stages around the occupiers. Hospital campuses such as Elmleigh Hospital (to the north of Northney) grow in stages, leaving movement joints wherever new blocks meet old. For a school such as Warblington School, playground and building joints can be done in the holidays.

Northney is about 3 miles south-east of Havant, in Hampshire. Businesses, contractors and managing agents in Northney can call on us for floor joints, as part of our coverage of Hampshire. Northney is one of 723 places we cover in Hampshire.

We take on floor joints across the PO11 postcode area, whatever the building. We cover commercial and managed buildings on Northney Lane, Spinnaker Grange and Northney Road and the roads nearby. Sites close to Northney are covered too, including North Hayling (1 mile south), Warblington (1 mile north), Tye (1 mile south), Stoke (1 mile south-west) and Langstone (1 mile north-west). Nearby towns on our patch include Gosport (8 miles west), Havant (3 miles north-west), Fareham (10 miles west), Horndean (6 miles north), Waterlooville (5 miles north-west) and Petersfield (12 miles north).

Around Northney

Recent enquiries here include premises near Eames Farm and The Ship Inn and the streets around them. The nearest railway station is Warblington station, roughly 1.7 miles north of the centre. A little further out are Havant Museum (1.7 miles north-west) and Havant War Memorial Hospital (2.1 miles north-west). For a walk, there’s Hayling Billy.

Map of Northney © OpenStreetMap contributors

Common questions from Northney clients

Is Northney too small for you to travel to?

No. Places such as Northney are covered as much as the big towns. We work across Greater London and the South East. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.

Does the sea air around Northney change the choice of sealant?

It can. Wind-driven rain and, closer to the shore, salt air are harder on external joints. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.

How do we get a quote for floor joints?

Send details through our quote form or by email and tell us what runs on the floor. We then send a fixed quote that shows the products and zones.

How long will the new sealant last?

Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.

Is it normal for joint filler to separate?

It can be shrinkage, contamination on the joint faces or a product unsuited to the movement. We look at which it is before recommending anything.

What site paperwork can you supply?

Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.

What guarantee do you give on joint filling?

There is a 12-month guarantee on our workmanship, and we hold public liability insurance.

For managing agents and facilities managers

As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.

Hotels, schools, healthcare sites, offices and retail units book us directly too. The work is planned around how the building runs, so the building keeps working while we do.

How a job runs

Occupied buildings need a little choreography. We sign and contain the area we are in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. Rural sites near Northney may need directions, gate codes or a contact on site. Add it to your enquiry and we will build it into the plan.

  1. We walk the floor and mark up joint widths, edge damage and traffic routes.
  2. You receive a fixed quote showing products and phasing.
  3. Old fill and packed debris come out until both faces are sound.
  4. Dust is vacuumed out and primer applied where specified.
  5. The joint is filled to its specified depth and trimmed level.
  6. Zones reopen once cured and the work moves on.

Preparing the site

  • Tell us your opening times and when work is allowed
  • Tell staff and tenants when we’ll be in
  • Flag any permit to work we will need

Request a quote

Let us know the site, the scope and your timescale, and we’ll put a fixed quote together. To get it moving, phone 01277 525 020 or send details through our quote form.

Ask for a quote

Advice

Cost factors for floor joints

There’s no standard rate for sealant work, because every site is different. What we take into account:

  • Phasing around occupants
  • Specialist products, such as fire-rated or hygienic sealants
  • Any access equipment needed
  • Induction, permit and paperwork requirements

No two sites price the same: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.

Sending details for a quote

There’s no need for a formal survey. A few details are enough to get going:

  • Drawings or a marked-up plan, if available
  • When you need the work done
  • A wide shot and a close-up of the area
  • The site address and postcode

For a fixed quote, phone 01277 525 020 or send details through our quote form with the site address and an outline of the work. Our quote form is another easy route.

Accreditations

Trusted. Accredited. Insured.