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

Expansion joint sealing in Four Marks

Expansion and movement joint sealing in walls, decks and floors across Four Marks, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • Layers of sealant in a movement joint
  • Hardened, cracked sealant on exposed facades
  • Expansion joints split through the centre of the bead
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Expansion joint sealing in Four Marks

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Expansion joint sealing in Four Marks, done properly

For movement joints in Four Marks, photographs and approximate lengths are the best start. Send them through our quote form, and we will arrange a site visit if needed before issuing a fixed quote. You can also give us a call on 01277 525 020 or use the quote form to talk the joints through. We work on precast concrete panel joints, blockwork control joints and podiums and floor movement joints, and what we’re called in for most is weathered movement joint sealant that no longer flexes and spalled or broken joint edges in floors and decks. A specialist sealant contractor works differently from a general builder: in Four Marks, that means joint design, primers and backing rod as standard.

Small units near places like Four Marks are often converted farm buildings with new concrete floors. Saw-cut and construction joints in those floors need the right filler or sealant for the forklifts and trolleys that use them.

Every job is signed off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.

Location
Four Marks (GU34)
Wider area
Hampshire
Cover
12 months on our workmanship
Price
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Commercial clients in Four Marks

CHAS accredited and a Constructionline member, we’re straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.

Building owners and managing agents use us on sealant work across single buildings or whole portfolios around Four Marks. One quote can cover more than one site, which keeps the paperwork simple.

What sealant work can’t fix

A few problems need another trade or a different fix, and we point that out rather than sealing over them:

  • Broken or spalled joint edges, which need repairing before any sealant goes in
  • A joint that has to be widened or re-detailed before it can work
  • Structural movement beyond what the joints were designed for (that needs a structural engineer)

Not sure which it is? You can give us a call on 01277 525 020 or email the details over and we will tell you honestly before you book.

Surfaces we seal

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

Questions about Four Marks

Will you take on work at estates like Mansfield Business Park, close to Four Marks?

Yes, sites like Mansfield Business Park are within our area, along with the rest of Four Marks. Photos and a short description are enough for a first look.

Can you work on a hospital site such as Alton Community Hospital?

Yes, healthcare and care buildings are part of our work. We follow the site’s permits, sign-in and infection-control procedures in every area.

What will the job cost?

There isn’t a price list, as every site differs. With photos or drawings, we can give you a fixed quote.

Can the sealant be colour-matched?

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.

Is movement joint sealing guaranteed?

A 12-month guarantee covers our workmanship. Keeping joints clear of debris helps them last.

Will you just go over the old sealant?

No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.

Do your applicators hold CSCS cards?

Yes. Should the site need card details in advance, let us know and we will send them with the quote.

Aftercare for building managers

After handover, a little attention goes a long way:

  • Act on the first tear or lifting edge rather than waiting
  • Inspect exposed joints once the cold weather has passed
  • Inspect movement joints alongside other routine building checks
  • Keep traffic off new joints until the cure time is up

Floor joints on main traffic routes need watching more closely than the rest. Avoid standing heavy loads or racking legs on the joints, and report any chipped edges early.

Floor joints with failed fillers break up quickly under wheels. Broken arrises jolt trucks, loads and drivers and the broken length grows with every pass. Sealing early protects the edges.

Signs you need expansion joint sealing in Four Marks

Sometimes the sealant holds but the substrate breaks away. Weak or crumbling concrete, brick or render edges give the sealant nothing sound to grip, so we tell you if the edges need repairing first.

What tends to prompt an enquiry:

  • Water getting into the wall through a failed joint
  • Sealant pulling off the joint face
  • Car park joints leaking onto vehicles below
  • Joints packed with grit and debris

Another example is Lower Soldridge Business Park, 1 mile to the west of Four Marks, where floors and yards would be done in stages around the occupiers.

What to look for in a quote

  • How long is the guarantee, and what does it include?
  • Will RAMS and insurance details be available?
  • Proof of insurance
  • Who will actually carry out the work

How to choose a sealant contractor

Slabs, ramps and loading bays in Four Marks

Rainfall across the South East, Four Marks included, is lower than in many parts of the UK. Even so, yard and car park joints are only sealed when they’re dry and clean, while winter salting gets into any joint left open. Less than 3 miles from Four Marks there are at least three named estates and business parks. Floors, loading bays and yards on sites like these are where floor and movement joints work hardest.

For an estate such as Alton Community Hospital (3.3 miles north-east of Four Marks), the joints in ramps, decks and long building elevations all need attention over time. Schools such as Four Marks Church of England Primary School have movement joints in their walls and floors that are easy to overlook.

Four Marks is about 4 miles south-west of Alton, in Hampshire. Four Marks sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. Four Marks is one of 723 places we cover in Hampshire for movement joints. Our Southampton page has more on work in that area (20 miles or so).

Work on movement joints is covered throughout GU34, whatever the building. Streets here include Read's Field, River Close and Chalk Close. Nearby places we also cover include Medstead (1 mile north), Soldridge (1 mile west), South Town (2 miles north-west), New Copse (2 miles north) and Hattingley (2 miles north-west) for movement joints. Further afield, our area takes in Basingstoke (11 miles north), Winchester (12 miles west), Fleet (15 miles north-east), Horndean (14 miles south), Alton (4 miles north-east) and Petersfield (9 miles south-east).

Near you in Four Marks

The nearest railway station is Alton station, roughly 4.6 miles north-east. Well-known places in the area include Barton Castle (3.5 miles north-west) and Alton Community Hospital (3.3 miles north-east). The countryside around Four Marks includes Red Hill.

Map of Four Marks © OpenStreetMap contributors

Our process

Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. Several jobs near Four Marks can be grouped on one trip. Tell us your site hours and we’ll plan around them.

  1. Photos, joint lengths and drawings come to us, or we visit.
  2. We compare each joint’s width with the movement and the sealant’s capability and tell you if the design looks wrong for the movement.
  3. Every joint is cleared of the failed seal and any grit packed into it.
  4. Any broken arrises or friable edges are flagged before work goes further.
  5. The right sealant goes in at the right depth, bonded to the two sides only.
  6. Each area is handed back after its cure time, under our 12-month guarantee.

Preparing the site

  • Have the specification and drawings to hand
  • Let building users know which areas are affected
  • Share your working hours and any access restrictions

Getting a fixed quote

Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. For a chat about it beforehand, give us a call on 01277 525 020 or email the details over.

Get a quick quote

Advice

When to bring in a specialist

Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.

Certain joints really need a specialist: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.

Accreditations

Trusted. Accredited. Insured.