The Mastic Doctor team standing beside their branded vans outside an office building
Scottish Borders · Scotland

Expansion joint sealing in Clockmill

Expansion and movement joint sealing in walls, decks and floors across Clockmill, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Expansion joints filled with dirt and stones
  • Car park joints leaking onto vehicles below
  • New sealant over old, now failing
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
Constructionline member
£5m public liability

Expansion joint sealing near Clockmill

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Joints that move: notes for Clockmill

The east of Scotland, where Clockmill is, gets less rain than the west. Frost and de-icing salt still find their way into open external joints. Autumn is a sensible time to seal them.

For an occupier at a site such as Duns Industrial Estate, 1.3 miles east of Clockmill, the joints at loading doors and dock levellers usually see the hardest wear. For a school such as Berwickshire High School, playground and building joints can be done in the holidays.

Clockmill is in the Scottish Borders. Commercial clients in Clockmill can call on us for movement joints, as part of our coverage of the Scottish Borders. We work across 91 places in the Scottish Borders, large and small. Sites around Edinburgh have their own page, roughly 34 miles from Clockmill.

Commercial sites across TD11 are covered for movement joints. We also cover Gavinton (1 mile south), Duns (1 mile east), Preston (3 miles north-east), Longformacus (5 miles north-west) and Swinton (6 miles south-east) for movement joints. Nearby towns on our patch include Kelso (12 miles south), Eyemouth (13 miles north-east), Earlston (15 miles south-west), Lauder (15 miles west) and Chirnside (6 miles east).

Near you in Clockmill

A little further out are Jim Clark Motorsport Museum (1 mile east) and Langton Castle (0.8 miles west). Open spaces near Clockmill include Hule Moss and Duns Castle nature reserve.

Map of Clockmill © OpenStreetMap contributors

Expansion joint sealing in Clockmill

Brickwork and blockwork walls have vertical movement joints at intervals, and they’re easy to miss until the sealant fails. Once the seal fails, rain reaches the cavity and the joint can no longer close. The old seal is cut away, backing rod goes in at depth, and a low-modulus masonry sealant is gunned and tooled. Site teams most often ask us about previous reseals laid over old sealant and expansion joints split through the centre of the bead, across precast concrete panel joints, blockwork control joints and brickwork movement joints. One point of contact handles commercial sealant work in Clockmill from the first photos to the final walk-round, whether it’s one building or several.

For floor or movement joints around smaller places like Clockmill, we plan to finish in one visit where we can. Send photographs, joint widths and details of the traffic first.

What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Clockmill (TD11)
Region
Scottish Borders
Cover
12 months on our workmanship
Quote
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026

Aftercare for building managers

After handover, a little attention goes a long way:

  • Include every elevation and deck joint in periodic inspections
  • Record the sealant used and the date in the O&M file
  • Sweep decks, ramps and floors so grit doesn’t collect in the joints
  • Inspect exposed joints once the cold weather has passed

Keep wheels, feet and water off new joints until the sealant has cured. The time varies with product, conditions and joint depth, and we confirm it for each area before we leave. Keeping the area coned off until then avoids tyre marks and damage.

Unsupported floor joint edges spall under forklift and pallet-truck wheels. Damaged edges make the floor rough and wear wheels faster. Sealing early protects the edges.

What we are called out for in Clockmill

Sometimes the sealant holds but the substrate breaks away. If the edge of the joint is friable, the bond fails with it.

Clients normally get in touch after noticing something like this:

  • Previous reseals laid over old sealant
  • Debris jammed in movement joints
  • Water dripping through deck or ramp joints
  • Torn sealant in brick or block movement joints

Large sites such as Knoll Community Hospital (1.2 miles east of Clockmill) have car parks, service roads and long elevations with movement joints in brick and panels.

What your quote should include

  • Will CSCS-carded applicators be on site?
  • What level of public liability insurance do they hold?
  • How the joint faces will be prepared and primed
  • Their approach to joint depth and backing

Our contractor checklist

When it isn’t the sealant

Sealant solves a lot, but not everything, and we are upfront when that’s the case. These need a different solution:

  • Cracking or settlement that calls for an engineer’s assessment
  • Broken or spalled joint edges, which need repairing before any sealant goes in
  • Proprietary pre-formed expansion joint systems

Not sure which it is? You can speak to us on 01277 525 020 or send details through our quote form and we will tell you honestly.

What we seal

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

When to bring in a specialist

Some joints are best left to specialists: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong normally costs more in the end than doing them right.

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.

Surface by surface

Joints between different materials

Some mixed-material joints suit a hybrid sealant. The choice depends on the substrates and how much the joint moves, and confirm it in the quote.

Car park decks and ramps

Water coming through deck joints is the usual first sign. The old seal comes out, the edges are prepared and the joint resealed, and we’ll tell you if any edges need repairing first.

Our process

Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and work section by section so the rest of the building stays in use. Where we can, we combine work around Clockmill with other jobs nearby, to make the most of each trip. Let us know if your dates have any give.

  1. The first job is to check each joint: how wide it is, how it moves and why the old seal let go.
  2. You get a fixed quote with the product and its movement capability stated.
  3. The failed seal is removed and both faces are cleaned until sound and dry, flagging any broken edges that need repair before sealing.
  4. We control the depth with backing rod or, in shallow joints, bond-breaker tape.
  5. Where the maker calls for primer, it’s applied first, then the bead goes in and is tooled to a concave finish.
  6. We check every joint before sign-off, and the work carries our 12-month guarantee.

Preparing the site

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

Ask for a quote

We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To ask for one, call the office on 01277 525 020 or send photos by email.

Get a quick quote

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Your questions answered

Can you take on a job at a hospital such as Knoll 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.

Is Clockmill off your patch?

Not at all: smaller places are covered as well as towns. Our area covers all of Scotland, cities, towns and islands alike. Where we can, we group nearby jobs to make the most of each trip.

Can you handle several sites?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

Can you work on car park ramps and decks?

Yes. Deck and ramp joints are resealed with a trafficable sealant chosen for the movement, and phased work can be planned so parts of the car park stay in use.

Do you take on small jobs?

Small jobs are welcome alongside larger packages. Photos and a description are enough to start.

What if there’s asbestos in the old mastic?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. 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. We don’t remove asbestos-containing materials.

Do you hold CHAS accreditation?

Yes. We are CHAS accredited and a Constructionline member.

Accreditations

Trusted. Accredited. Insured.