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

Expansion Joint Sealing in Longstock

Need expansion joint sealing in Longstock? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.

  • Torn sealant in brick or block movement joints
  • Spalled or broken joint edges in floors and decks
  • Water dripping through deck or ramp joints
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Expansion joint sealing across Longstock

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

What we are called out for in Longstock

Sealant peeling cleanly off one side is an adhesion failure. Poor preparation, a skipped primer, or sealant bonded to the back of the joint are typical reasons.

Any of the following is a good reason to get the joints checked over:

  • Joints where the bead has lost adhesion
  • Water dripping through deck or ramp joints
  • New sealant over old, now failing
  • Joints packed with grit and debris

Hospital campuses such as Andover War Memorial Hospital, 5.8 miles north of Longstock, grow in stages, leaving movement joints wherever new blocks meet old.

Comparing quotes

  • Their approach to joint depth and backing
  • Whether old or failed sealant will be cut out, not overlaid
  • Do they follow the manufacturer’s priming guidance?
  • The terms of the workmanship guarantee

How to choose a sealant contractor

Expansion joint sealing for commercial buildings in Longstock

Width, depth and product all have to work together. Joint width must suit the movement and the movement class of the sealant while depth is limited by backing rod or, in shallow joints, a bond-breaker. For wider joints, the width-to-depth ratio is often around 2:1, as the manufacturer advises and the bead bonds to the sides, never the back. We work on cladding panel joints, podiums and floor movement joints and precast concrete panel joints, and the usual reasons a site gets in touch are new sealant over old, now failing and joints packed with grit and debris. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Longstock it comes down to the same thing: the right product in a properly prepared joint.

Around smaller places such as Longstock, floor joints are often in barns and farm buildings turned into workshops, stores and offices. Joints in those slabs take vehicles, trolleys and foot traffic, and need a filler or sealant to match.

Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.

Where
Longstock (SO20)
Wider area
Hampshire
Cover
A 12-month guarantee
Quotes
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Warehouse floors and decks around Longstock

The South East is one of the drier parts of the UK. Outside joints in yards and car parks still have to be dry before sealing, and gritting in cold spells finds its way into open joints. Central London is about 65 miles from Longstock. The South East has large numbers of industrial estates and warehouses along the motorway corridors, and their floor joints take forklift and pallet-truck traffic all day.

In a school such as Test Valley School, movement joints in brick, block and hall floors tend to be forgotten until they leak.

Longstock is about 5 miles south of Andover, in Hampshire. Commercial clients in Longstock use us for work on movement joints, as part of our coverage of Hampshire. Longstock is one of 723 places we cover in Hampshire. We also cover Southampton, some 15 miles away.

Anyone looking for expansion joint sealing in SO20 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Just outside Longstock, we also work in Leckford (1 mile east), Stockbridge (1 mile south), Fullerton (2 miles north-east), Cottonworth (2 miles north-east) and Chilbolton (3 miles north-east). Nearby towns on our patch include Winchester (9 miles south-east), Eastleigh (13 miles south-east), Andover (5 miles north), Totton (15 miles south), Chandler's Ford (11 miles south-east) and Romsey (10 miles south).

Near you in Longstock

Recent enquiries here include premises near Longstock Park and The Peat Spade Public House. Well-known places in the area include Andover War Memorial Hospital (5.8 miles north). For a walk, there’s Mill Lake.

Map of Longstock © OpenStreetMap contributors

Maintenance after handover

Once the work is signed off, a little attention goes a long way:

  • Treat a small split as a warning, not a cosmetic issue
  • Look over external and deck joints after a hard winter
  • Leave barriers in place until fresh joint sealant has cured
  • Note which joints were done, when, and with what

Snow ploughs and scrapers catch on joint lines. Lifting the blade at each joint avoids tearing the bead and a look at the joints after winter catches any damage.

Joints sealed at the same time generally fail around the same time. Inspecting the whole run is worth the effort, so the work can be planned rather than rushed. We can suggest an order, worst joints first.

When it isn’t the sealant

Part of a good diagnosis is knowing where sealant stops. You will hear from us if the cause turns out to be one of these:

  • A joint that has to be widened or re-detailed before it can work
  • Leaks coming from the membrane rather than the joint seal
  • Structural movement beyond what the joints were designed for (that needs a structural engineer)

If in doubt, ring 01277 525 020 or email the details over and we will say what we think.

Where we work in Longstock

  • Brickwork movement joints
  • Podiums and floor movement joints
  • Blockwork control joints
  • Precast concrete panel joints
  • Car park decks and ramps
  • Cladding panel joints

Owners, agents and contractors

Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.

Common questions from Longstock clients

Is a smaller place like Longstock outside your area?

Not at all: smaller places are covered as well as towns. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.

Does a site in Longstock have to shut while its joints are sealed?

In most cases the site keeps working. Joints are done in phases, a bay, aisle or deck at a time. Tell us which hours and entrances we can use and we will plan from there.

What’s the difference between an expansion joint and a movement joint?

The general name is movement joint, and expansion joint is one common type. In everyday use the two names are often swapped and the way they’re sealed is similar.

How do I request a quote?

The quote form is the simplest route, though you can also speak to us on 01277 525 020 or send photos by email. Include photos or drawings if you have them.

Can you quote from photos?

It depends on the job. Straightforward work can often be priced from photos and measurements, while larger or less clear jobs get a site visit first.

Can the sealant be colour-matched?

Often, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We will confirm the colours available for the specified product.

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.

When to bring in a specialist

Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.

From enquiry to sign-off

Working in a building that stays open takes some planning. We sign and contain the area we’re in, keep walkways clear and work section by section so the rest of the building stays in use. If others near Longstock need work, visits can be combined, which keeps travel down. A fixed quote is given before anything starts.

  1. We assess the joints on site or from photos, noting widths and how each has failed.
  2. You receive a fixed quote stating the product and the movement it is rated for.
  3. Where areas have to stay open, we agree a phased sequence before starting.
  4. We strip the old sealant or filler and prepare each face until it’s sound and dry.
  5. Depth is controlled with backing, the faces are primed where the maker calls for it, then the bead is laid and tooled.
  6. Finished joints are inspected, the cure time confirmed and the 12-month guarantee applies.

Preparing the site

  • For older buildings, check the asbestos register before work
  • Let us know about inductions and permits
  • Warn occupants and staff about the work

Request a quote

To get a fixed quote, phone 01277 525 020 or email a schedule or drawings, telling us the site location and the nature of the job. Our quote form is another easy route.

Get a quick quote

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