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

Sherborne St John expansion joint sealing

Looking for expansion joint sealing in Sherborne St John? It’s simple: send details, get a quote, we seal, guaranteed.

  • Water dripping through deck or ramp joints
  • Arrises breaking up along floor joints
  • Debris jammed in movement joints
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
Constructionline member
£5m public liability

Expansion joint sealing for Sherborne St John sites

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

Expansion joint sealing in Sherborne St John, done properly

Joint design counts for as much as the sealant itself. Joint width must suit the movement and the movement class of the sealant. For wider joints, the width-to-depth ratio is often around 2:1, as the manufacturer advises, and the bead is tooled so it grips the two faces alone. We work on car park decks and ramps, brickwork movement joints and precast concrete panel joints, and the failures we are asked to look at most are joints where the bead has lost adhesion and expansion joints split through the centre of the bead. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Sherborne St John it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Around smaller places such as Sherborne St John, floor joints are often in barns and farm buildings turned into workshops, stores and offices. Whether it’s a farm store turned workshop or a storage unit, the joints need a product that suits the traffic.

Our workmanship is guaranteed for 12 months, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
Sherborne St John (RG24)
Wider area
Hampshire
Cover
12 months on our workmanship
Price
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026

Aftercare for building managers

To get the most from the new sealant:

  • Note which joints were done, when, and with what
  • Keep traffic off new joints until the cure time is up
  • Include every elevation and deck joint in periodic inspections
  • Keep scrapers and ploughs from dragging across joint sealant

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’ll tell you when each bay or area can reopen. Keeping the area coned off until then avoids tyre marks and damage.

When one joint fails, others of the same age are rarely far behind. It pays to check every joint, not just the obvious one. We’ll tell you which movement joints need doing now and which can wait.

Different surfaces, different methods

Cladding panel joints

Cladding panels move more than masonry as they heat and cool. The joints need a low-modulus sealant with enough movement capability, and we’ll confirm the colours available for the specified product.

Joints between different materials

Different materials meeting at a joint rarely move in step. The product must bond to both substrates and cope with the movement.

Floors, slabs and movement joints in Sherborne St John

At about 46 miles from central London, Sherborne St John is within reach of the capital. The roads out of London are lined with trade parks and distribution sheds. Sherborne St John sits in one of the drier corners of the country, the South East. External slab and deck joints still need a dry, clean joint to seal, and gritting in cold spells finds its way into open joints.

Phasing is what makes joint work possible on busy sites such as Devonshire Business Park (1.6 miles south of Sherborne St John): one bay, aisle or car park row at a time. A healthcare site such as Parklands Hospital, 0.9 miles south of Sherborne St John, depends on car parks, ramps and service yards whose joints take traffic all day. Warehouse floors on estates like Knight Trade Park, 1.5 miles south of Sherborne St John, carry pallet trucks and forklifts over every saw-cut joint.

Sherborne St John is about 2 miles north of Basingstoke, in Hampshire. Businesses, contractors and managing agents in Sherborne St John can call on us for movement joints. Our Hampshire coverage takes in 723 places, from busy centres to rural villages. Sites around Reading have their own page, about 12 miles away.

If you need expansion joint sealing in RG24, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Buildings on Cranes Road, Bourne Field and Church Path are within our area. Sites close to Sherborne St John are covered too, including Rooksdown (1 mile south-west), Winklebury (2 miles south), Basingstoke (2 miles south), Worting (3 miles south-west) and South Ham (3 miles south). Further afield, our area takes in Farnborough (15 miles east), Fleet (12 miles east), Aldershot (15 miles east), Alton (12 miles south-east), Yateley (12 miles east) and Tadley (4 miles north).

Near you in Sherborne St John

In Sherborne St John, that means premises near Everest Community Academy and the streets around them. Sherborne St John’s nearest station is Basingstoke station, roughly 2.1 miles south-east of the centre. Nearby you’ll also find Basing House (3.1 miles south-east) and Basingstoke and North Hampshire Hospital (1.1 miles south). For a walk, there’s Daneshill Park Woods.

Map of Sherborne St John © OpenStreetMap contributors

How the quote is worked out

There’s no standard rate for sealant work, since sites vary so much. What we take into account:

  • Backing rod, priming and other preparation
  • Access and working height
  • Working within restricted access windows
  • Travel to remote or island sites

The product called for affects the cost, as does the preparation each joint needs. Access, phasing and site requirements come into it too.

Sending details for a quote

We can often quote from photographs and a few details. It helps to include:

  • Access details, including height
  • Specification clauses that apply
  • Photos of the joints, close up and from further back
  • Rough lengths or quantities, or drawings if you have them

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. For smaller jobs, photos and a description will do.

Sherborne St John: questions and answers

Is Sherborne St John too far out for you?

Not at all. Sherborne St John is within our area. 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.

Does your area include sites such as Knight Trade Park, near Sherborne St John?

Yes. We cover Sherborne St John and the area around it, including industrial estates, business parks and retail parks such as Knight Trade Park. Photos and a short description are enough for a first look.

Can you work while the building is occupied?

In most cases, yes. We phase the work so most of the building stays in use, with each area protected and signed.

Why has the sealant in our expansion joints split?

The way it has failed normally tells us why: tearing down the centre means too much movement, and lifting off one side means poor adhesion. Sometimes the edge material itself has failed.

What exactly is a movement joint?

The general name is movement joint, and expansion joint is one common type. On site, people tend to use them interchangeably.

Do you use silicone or polyurethane in movement joints?

The right product depends on the joint. Facades often take a low-modulus silicone; floors and decks typically need a polyurethane, and the specification has the final say.

Can you work on car park ramps and decks?

Yes. These joints take wheels, salt and water, so product choice matters and broken edges are flagged before sealing.

Site staff or a sealant specialist?

A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

What happens if it’s left?

Doing joint resealing alongside other planned works can save on access. Leaking joints need sealing now because damage continues. We can split the scope into urgent and planned. One visit to deal with every failing joint makes more sense than several trips to a place like Sherborne St John, rather than one at a time. Send photographs of each area and we’ll quote for the lot.

The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a fixed quote.

Why us?

  • Fully insured
  • Colour agreed before work starts
  • CHAS accredited contractor
  • CSCS-carded applicators

See our cost guide or our accreditations and insurance.

How a job runs

On arrival, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before anything is cut or cleaned, with the work itself typically taking anything from part of a day to a couple of weeks, depending on joint lengths, widths and access. Rural sites near Sherborne St John 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 start with photos, approximate lengths and any drawings, visiting where needed.
  2. We compare each joint’s width with the movement and the sealant’s capability, and flag anything that needs an engineer.
  3. Every joint is cleared of the failed seal and any grit packed into it.
  4. Edges are checked, and we tell you if any need repairing before sealing.
  5. The right sealant goes in at the right depth, bonded to the two sides only.
  6. Areas reopen once cured, and the work carries our 12-month guarantee.

Before we start on site

  • Confirm the product named in the specification
  • Make sure the joints can be reached
  • Tell staff and tenants when we’ll be in

Getting a fixed quote

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, call 01277 525 020 or email drawings and photos.

Get a quick quote

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