Construction and new-build mastic in Upper Coll, Na h-Eileanan Siar
Work needed on a mastic package in Upper Coll? We assess it, carry out the work and guarantee our workmanship for 12 months.
- A mastic package split between trades with no clear owner
- Early adhesion failures on new external joints
- Bath and shower joints scraped during the final clean
Construction mastic in Upper Coll
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
How we handle construction mastic in Upper Coll
Mastic Doctor has been a subcontractor on construction projects for over 20 years. We price from drawings and the specification, agree the sequence with the site team and seal as areas are released. For construction mastic on a scheme in Upper Coll, send drawings through our quote form, or phone or email us to talk it through. If you are dealing with different trades sealing to different standards and missed perimeter joints on a new elevation, we can help, on cladding and panel joints, sanitary and kitchen joints and window and door perimeters alike. Most enquiries from Upper Coll start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.
Sites near smaller places like Upper Coll can mean longer travel, so the mastic is planned with as few trips as the job allows. Send drawings, photos and the programme so everything needed arrives on the first day.
The 12-month guarantee covers our workmanship: 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.
- Location
- Upper Coll (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- 12 months on our workmanship
- Quote
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Site staff or a sealant specialist?
Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong typically costs more in the end than doing them right.
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.
Facades, frames and programmes in Upper Coll
With the shore within about 1 mile, Upper Coll counts as a coastal location. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, so joint design, primers and product choice deserve extra care. Building work in Upper Coll comes under the Building (Scotland) Regulations 2004 and their technical handbooks, with warrants from the local authority verifier. The mastic package follows the approved specification.
On any site in or around Upper Coll, the mastic follows the specification and the programme.
Upper Coll (Gaelic: Col Uarach) is in Na h-Eileanan Siar. Any commercial site in Upper Coll is covered, whether it’s a single job or part of a planned programme. Upper Coll is one of 87 places in Na h-Eileanan Siar on our list.
Commercial sites across HS2 are covered. We also cover Aird Tong (1 mile south), Tong (1 mile south-west), Bac (2 miles north-east), Newmarket (3 miles south-west) and Steinis (3 miles south). Remote and island addresses take more planning, from travel and ferries to the weather, so give the site location in your enquiry.
Local landmarks in Upper Coll
Nearby you will also find Lewis Loom Centre (3.6 miles south-west) and Western Isles Hospital (3 miles south-west). Not far away are Loch Àirigh na Lic.
On site: what to expect
Diagnose, treat, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. For a building near Upper Coll, directions, keys and a contact on the day are worth sorting early. That goes into the plan alongside the quote.
- First we look at the scope on site or from drawings.
- A fixed quote sets out scope, products and phasing.
- Paperwork is agreed and applicators are inducted on site.
- Sealing follows the programme as areas are released.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
Preparing the site
- Send your site hours and access windows
- Have the specification and drawings to hand
- Arrange parking or a loading space
Quotes
Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. For smaller jobs, photographs and a description will do.
Advice
Surface by surface
Snagging before handover
The last pass before handover is where mastic snags are cleared. We can work through the snag list area by area, cutting out damaged joints and resealing them properly.
Internal decorators’ caulk
Where the specification calls for it, acrylic decorators’ caulk goes on non-moving internal gaps before painting. It’s for gaps that stay still and get painted.
Work for main contractors and building owners
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.
Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
How the quote is worked out
Each job is priced on its own details. The things that drive the figure:
- The site’s rules and procedures
- Which sealant the job calls for
- Joint width, depth and condition
- How much existing material needs removing
The specified product makes a difference, and so does the preparation, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.
What we need to price the job
For an accurate fixed quote, we need to understand the site. Send us:
- Access details, including height
- Any dates the work must fit around
- Whether an asbestos survey exists
- Clear photos of the problem areas
We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, speak to us on 01277 525 020 or email the details over.
Your questions answered
Will you travel to Upper Coll on the island?
Yes, Upper Coll is within the area we cover. We cover the whole of Scotland. We group island work where we can and plan around the crossings.
Our building in Upper Coll is near the coast: does that change the sealant?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Can you work to our specification?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.
How do we ask for a quote?
You can use the quote form on this site; alternatively, speak to us on 01277 525 020 or email drawings and photos. Photos, drawings or a joint schedule help us quote quickly.
Can you clear a mastic snag list before handover?
Yes. Share the list and photographs, and a fixed quote follows.
When is resealing likely to be due?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
When can the area be used after sealing?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, so we’ll confirm the curing time on the day.
Do you need construction mastic in Upper Coll?
Frames installed with uneven gaps make perimeter sealing harder. Sealant has a range of joint widths it can cope with, so gaps outside that range need sorting by the installer first. We flag them early rather than filling them with sealant that won’t last.
Any of the following is a good reason to get the joints checked over:
- Missed perimeter joints on a new elevation
- Cracks opening in caulked internal joints
- External joints sealed in damp or cold conditions that are now failing
- A long mastic snag list close to completion
Extensions at sites like Western Isles Hospital, 3 miles south-west of Upper Coll, normally sit beside working departments, and the mastic follows strict access rules.
Questions to ask before you book
- What the guarantee covers, and for how long
- How joint depth will be controlled
- How they’ll work around occupants
- The named product and why it was chosen