Back expansion joint sealing
Commercial sealant work in Back for contractors, FMs and building owners: expansion and movement joint sealing in walls, decks and floors, quoted at a fixed price.
- Joints where the bead has lost adhesion
- Layers of sealant in a movement joint
- Leaks through car park deck joints onto the level below
Expansion joint sealing for Back sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Expansion joint sealing for commercial buildings in Back
Mastic Doctor has sealed movement joints since 2005 for contractors, facilities managers and owners. CHAS accredited, Constructionline member, CSCS-carded applicators and five million pounds of public liability insurance. Workmanship is backed by our 12-month guarantee. We work on cladding panel joints, precast concrete panel joints and brickwork movement joints, and the usual reasons a site gets in touch are sealant peeling off one face of the joint and weathered movement joint sealant that no longer flexes. A single leaking joint is often how a building in Back first comes to us: we look at the rest while we’re there and tell you what we find.
For outside joints near Back, the Scottish weather sets the timetable: sealant needs a dry joint and a temperature within its range. Inside slabs aren’t affected and can be scheduled around the occupier.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Place
- Back (HS2)
- Wider area
- Na h-Eileanan Siar
- Guarantee
- A 12-month guarantee
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Common problems we fix in Back
On trafficked joints, wheels and salts do the damage. Wheel loads stress the sealant and the arrises. A sealant that isn’t trafficable won’t last there.
These are often picked up first by site or facilities staff:
- Water dripping through deck or ramp joints
- Torn sealant in brick or block movement joints
- Water getting into the wall through a failed joint
- Brittle, chalky sealant on external joints
In and around Back, the right filler or sealant for each joint depends on the traffic and the movement it takes.
Before you book anyone
- Whether primer will be used where the manufacturer specifies it
- Their plan for phasing and protecting the area
- Their pre-qualification and accreditations
- How the existing material will be dealt with
Expansion joint sealing in Back: the local picture
Back lies within about 1 mile of the sea. Coastal yards and decks give their joints salt and wet weather to deal with, not just wheels, so a failed joint lets more in and the edges break up sooner. Work on Back has to fit the ferry timetable and the forecast. Photos and joint sizes help us load the right products.
Sites like Western Isles Hospital, 5.4 miles to the south-west of Back, carry ambulances, deliveries and visitors’ cars over their road and deck joints.
Back is about 6 miles north-east of Stornoway, in Na h-Eileanan Siar. Across the HS2 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. 87 places across Na h-Eileanan Siar fall within our area, Back among them.
We take on movement joints across the HS2 postcode area, whatever the building. Among the streets we cover are Broadbay View, Rathad na Sgoile and Sraid na H-Eaglaise, and sites on any of them can send details for a fixed quote. If your building is just outside Back, we cover Sulaisiadar (5 miles south-east), Garrabost (5 miles south-east), Na h-Eileanan an Iar (5 miles south), Knock (5 miles south) and Aiginis (5 miles south). For island and remote sites, travel and materials need planning ahead, so the full address helps from the start.
Local landmarks in Back
Well-known places in the area include Western Isles Hospital (5.4 miles south-west). Open spaces near Back include Loch Langavat.
Work for main contractors and building owners
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. We can agree access arrangements and keyholder contacts beforehand.
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
Maintenance after handover
Your facilities or cleaning team can help the joints last. Pass these on to them:
- Check joints after long freezing spells
- Treat a small split as a warning, not a cosmetic issue
- Clear dirt from joint lines during routine cleaning
- Keep racking legs and heavy point loads off floor joints
Fresh joint sealant needs its full cure time before it takes traffic or water. How long that takes depends on the product, the temperature and the depth of the joint, and we confirm it for each area before we leave. Keeping the area coned off until then avoids tyre marks and damage.
An open joint fills with grit, and a joint full of grit can’t close. The arrises crack and break away under the load and the reseal becomes an edge repair as well. A sound seal keeps the joint working.
When something else is needed
Not every problem is a sealant problem, and we’re upfront when that’s the case. It won’t fix:
- Failed waterproofing membranes on podiums, roofs or decks (a waterproofing specialist’s job)
- Cracking or settlement that calls for an engineer’s assessment
- Proprietary pre-formed expansion joint systems
If in doubt, give us a call on 01277 525 020 or email the details over and we’ll say what we think before you book.
Joints and surfaces we work on
- Blockwork control joints
- Precast concrete panel joints
- Cladding panel joints
- Car park decks and ramps
- Brickwork movement joints
- Podiums and floor movement joints
Different surfaces, different methods
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 priming where the maker calls for it.
Internal floor movement joints
Warehouse and retail floors have saw-cut induced joints and construction joints. Trafficked floor joints often get a semi-rigid filler.
On site: what to expect
Working in a building that stays open takes some planning. We sign and contain the area we are in, with routes through the building left open and work section by section so the rest of the building stays in use. Jobs near Back are often grouped with others in the same area. Tell us how flexible your dates are.
- We start with photographs, approximate lengths and any drawings, visiting where needed.
- Joint widths and expected movement are checked against what the sealant can take, and flag anything that needs an engineer.
- Old sealant and debris are cut out of every joint.
- Any broken arrises or friable edges are flagged before work goes further.
- A sealant suited to the movement and traffic is laid to depth and tooled.
- Each area is handed back after its cure time, under our 12-month guarantee.
Preparing the site
- Make sure the joints can be reached
- Flag any permit to work we will need
- Send your site hours and access windows
Get a fixed quote
Need a figure for a tender or a budget? We’ll quote against your scope and drawings you can plan around. For a chat about it beforehand, call the office on 01277 525 020 or email the details over.
Related advice
Your questions answered
Does a coastal location like Back affect which sealant is used?
It can. Wind-driven rain and, closer to the shore, salt air are harder on external joints. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.
Do you work on the island where Back is?
Yes, Back is within the area we cover. Every Scottish council area is within our area. We group island work where we can and plan around the crossings.
Do you guarantee expansion joint work?
A 12-month guarantee covers our workmanship, and we are fully insured for public liability. Regular sweeping and inspection help the joints last.
Can you seal car park deck joints?
Yes. Let us know the opening hours and which levels or bays have to stay available, and we will plan the phasing around it.
Can you seal joints in cold or wet weather?
Sealing onto a damp surface leads to adhesion failure, so external work waits for suitable conditions. The work is simply moved to the next suitable day.
Do you hold CHAS accreditation?
Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.
What’s the difference between an expansion joint and a movement joint?
Put simply, it’s a planned break in a wall, slab or deck so the materials can move. Expansion joint is a name often used for the same thing.