Construction and new-build mastic in Back, Na h-Eileanan Siar
Work needed on a mastic package in Back? We assess it, carry out the work and guarantee our workmanship for 12 months.
- External joints sealed in damp or cold conditions that are now failing
- A mastic package split between trades with no clear owner
- Existing joints on a refurb that need cutting out and resealing
Construction mastic for Back sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Cost factors for mastic packages
We price every job individually. The things that drive the figure:
- Travel to remote or island sites
- The site’s rules and procedures
- Specialist products, such as fire-rated or hygienic sealants
- The total length or number of joints
No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Details that help us quote
A good diagnosis starts with the right details. Tell us:
- Specification clauses that apply
- Anything awkward about access or site hours
- The type of building and who uses it
- A wide shot and a close-up of the area
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to ring 01277 525 020 or email the details over with what you know.
Construction mastic in Back
On refurbishments, the mastic package usually includes cutting out old sealant as well as sealing new work. Old beads come out completely, as fresh silicone can’t grip old and the asbestos survey is checked first on older stock. New and existing joints then get the same preparation. The enquiries we see most involve existing joints on a refurb that need cutting out and resealing and bath and shower joints scraped during the final clean, on brick and block movement joints, sanitary and kitchen joints and internal decorators’ caulk. Facilities teams, main contractors and managing agents in Back tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
Construction around smaller Scottish places like Back is often one-off schemes: a school, a health centre, a hotel extension or a few houses. The mastic still needs to suit exposed elevations and Scottish weather.
We sign every job off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.
- Where
- Back (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Updated
- 3 November 2026
Diagnose, treat, sign off
In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then reopened once the sealant allows before we move to the next. For a building near Back, directions, keys and a contact on the day are worth sorting early. We’ll confirm the plan with the fixed quote.
- We price from the drawings, specification and programme you send.
- We return a fixed quote that ties the mastic package to your programme.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- Areas are sealed plot by plot or floor by floor as the trades hand them over.
- Every joint is prepared, set to depth and sealed with the specified product.
- Snags are cleared before handover and completed areas carry our 12-month guarantee.
What we need from you
- Send asbestos survey details if the building is pre-2000
- Send your site hours and access windows
- Agree which areas must stay open
Get a fixed quote
The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or give us a call on 01277 525 020 or email the details over if you’d rather talk the job through.
Related advice
Should maintenance staff do it?
A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
More services for Back
Facades, frames and programmes in Back
The sea is no more than about 1 mile from Back. On a coastal site, facade and perimeter joints face driven rain and, closer to the beach, salt, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. Being on an island, Back means planning around ferry times as well as the weather. With drawings and the programme in hand, the whole mastic package comes with us.
On any site in or around Back, the mastic follows the specification and the programme. Extensions at sites like Western Isles Hospital (5.4 miles south-west of Back) typically sit beside working departments, and the mastic follows strict access rules.
Back is about 6 miles north-east of Stornoway, in Na h-Eileanan Siar. Looking for construction mastic in Back? We can help, as we do across Na h-Eileanan Siar. 87 places across Na h-Eileanan Siar fall within our area, including Back.
Business premises anywhere in HS2 are within our area. We cover commercial and managed buildings on Broadbay View, Rathad na Sgoile and Sraid na H-Eaglaise and the roads nearby. Sites close to Back are covered too, including 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.
Landmarks near Back
Well-known places in the area include Western Isles Hospital (5.4 miles south-west). The countryside around Back includes Loch Langavat.
Maintenance after handover
Your facilities or cleaning team can help the joints last. Share these points with them:
- Allow flexibility for external sealing in damp or cold weather
- Use the product the specification names
- Brief the final clean team to avoid blades near sealant
- Bring the mastic contractor in after the last trades are through
Expect some settlement in the first months. Flexible sealants in the right joints handle normal movement, but caulk in a joint that moves more than expected may crack. If that happens, let us know.
Sealing outside when the joint is damp or too cold leads to poor adhesion. Waiting for a dry joint and the right temperature is better than redoing work.
Questions about Back
Is Back inside the area you cover, given it’s on an island?
Yes, Back is within the area we cover. Our area covers all of Scotland, cities, towns and islands alike. We group island work where we can and plan around the crossings.
Our building in Back is near the coast: does that change the sealant?
It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Which sealant will you use?
A specification, where there is one, decides it. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
Can you work while the building is occupied?
Yes, as long as we plan it. Tell us your site hours and access windows and we will plan around them.
Is colour matching possible?
That depends on the product specified. Some ranges are wide, others limited, so the available colours are confirmed with the quote.
How much does the work cost?
Every job gets its own fixed quote. To get one, call the office on 01277 525 020 or use the quote form.
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.
How the job changes by surface
Window and door perimeters
Frames sealed into the opening keep rain out of the reveal. They’re sealed with a low-modulus neutral-cure silicone or another product named in the specification, with backing rod in deeper gaps.
External facade and movement joints
Brickwork, blockwork and panel movement joints need a sealant with the right movement capability. Depth is controlled with backing rod so the bead bonds to two sides only.
Owners, agents and contractors
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, with each stage agreed with your site contact.
Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so the building keeps working while we do.