The Mastic Doctor team standing beside their branded vans outside an office building
Na h-Eileanan Siar · Scotland

Mastic sealant contractors in Upper Coll

Mastic sealing for Upper Coll, from a contractor working since 2005. Fully insured, with a 12-month guarantee.

  • Leaks at window and door perimeters
  • No planned programme for sealant
  • Worn sealant at communal door frames
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Mastic sealing near Upper Coll

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Mastic sealing for commercial buildings in Upper Coll

For blocks and buildings in Upper Coll and across Na h-Eileanan Siar, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. A list of buildings, a few photographs and approximate joint numbers are enough for a quick quote or we can visit. We work on shopfronts below residential blocks, external wall and movement joints and balcony and threshold joints, and what we’re called in for most is the same joint failures repeated across a portfolio and worn sealant at communal door frames. Looking for mastic applicators who cover Upper Coll? We’ve been sealing commercial buildings since 2005.

Travel to smaller places like Upper Coll is planned so several buildings can be done on one trip. A list of addresses and photographs lets us quote for them together.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we are clear about what is covered before work starts.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Upper Coll (HS2)
Region
Na h-Eileanan Siar
Guarantee
12 months on every job
Price
Fixed quote, scope in writing
Call
01277 525 020
Updated
3 November 2026

When it isn’t the sealant

We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:

  • Misted or failed double-glazed units
  • Asbestos-containing sealant, which we don’t remove
  • Leaks from above rather than through a joint

If in doubt, speak to us on 01277 525 020 or email a schedule or drawings and we’ll say what we think.

What we seal

  • Communal kitchens and washrooms
  • External wall and movement joints
  • Window and door perimeters on blocks
  • Balcony and threshold joints
  • Shopfronts below residential blocks
  • Communal entrances and stairwells

FAQs: Upper Coll

Can one quote cover a number of our buildings near Upper Coll?

Yes. Portfolio-wide programmes are a regular request. Send the addresses and photographs and we’ll give a fixed quote.

Will you travel to Upper Coll on the island?

Yes. Islands are part of our area, Upper Coll included. Island work is planned around ferry crossings and the weather, so photos and a full list before we travel are essential.

When is resealing likely to be due?

Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.

Can you send RAMS and CSCS details before starting?

We are CHAS accredited, a Constructionline member and carry public liability insurance. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.

Can you seal joints high up on a block?

Access is discussed and agreed before the quote is fixed. Tell us the building height and any access already in place, and we will tell you how we’d approach it.

Is asbestos a concern with old mastic?

We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested in line with the dutyholder’s asbestos management.

How long before the joints can be used?

That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

Building owners, agents and FMs in Upper Coll

Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.

For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first, and our applicators hold CSCS cards.

From enquiry to sign-off

Site rules come first: signing in, inductions and any permit to work. Once we are cleared to begin, we take the joints in the sequence agreed with you, and each area is checked before we leave it. Where we can, we combine work around Upper Coll with other jobs nearby, to make the most of each trip. Let us know if your dates have any give.

  1. Each block or building is walked and the failed joints recorded with the likely cause.
  2. You get a fixed quote, priced per building where that helps your budgeting.
  3. Dates, areas and access are agreed so residents or tenants can be told in advance.
  4. Failed mastic is removed and the faces taken back to sound, dry material.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Completed joints are inspected and carry a 12-month workmanship guarantee.

Before we start on site

  • Make sure the joints can be reached
  • Point out parking and an unloading spot
  • Share your working hours and any access restrictions

Getting a fixed quote

A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or call the office on 01277 525 020 or email the details over if you’d rather talk the job through.

Ask for a quote

Advice

How the quote is worked out

Quotes vary with the job. Expect it to depend on:

  • Specialist products, such as fire-rated or hygienic sealants
  • Site requirements such as inductions and permits
  • Removal of failed or old sealant
  • Location, for remote and island sites

We don’t publish prices, since every building and every scope is different. Call for a quote.

Sending details for a quote

A good diagnosis starts with the right details. Tell us:

  • Whether an asbestos survey exists
  • The type of building and who uses it
  • Drawings or a marked-up plan, if available
  • Anything awkward about access or site hours

To get a fixed quote, give us a call on 01277 525 020 or email the details over with the site address and an outline of the work. You can also send details through our quote form.

What we’re called out for in Upper Coll

We often find joints filled solid with no backing rod so the mastic is bonded on three sides. That three-sided adhesion stops it stretching and splits as the building moves.

Site and facilities staff are often the first to spot these:

  • Draughts at frames across a block
  • Patchy repairs in mismatched sealant
  • Estate-wide sealant that is simply worn out
  • Communal area joints that look neglected

Wherever your building is in or near Upper Coll, we look at the whole elevation before quoting, so you know what needs doing now.

Before you book anyone

  • Can the work be phased to keep areas open?
  • Who will actually carry out the work
  • Do they follow the manufacturer’s priming guidance?
  • The named product and why it was chosen

Questions to ask before you appoint anyone

After the work

To get the most from the new sealant:

  • Make it easy for occupiers to report draughts
  • Plan resealing building by building rather than complaint by complaint
  • Prioritise elevations facing the weather
  • Mention RAMS, insurance or CSCS requirements up front

Encourage occupiers to report water or draughts at frames. Early reports catch failures before damage spreads.

Failed mastic often goes unnoticed until heavy rain finds it. Acting at the first signs keeps it a straightforward reseal and saves internal repairs.

Blocks and managed buildings in Upper Coll

With the shore within about 1 mile, Upper Coll counts as a coastal location. On buildings near the shore, the side facing the weather normally needs its mastic renewed first. Island jobs, Upper Coll among them, are planned around the ferry and the forecast. Send photographs and addresses so every building can be covered on as few trips as possible.

For owners and agents with buildings in or around Upper Coll, block-wide mastic programmes deal with frames and external joints of the same age together.

Upper Coll (Gaelic: Col Uarach) is in Na h-Eileanan Siar. Anywhere in HS2, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Upper Coll is one of 87 places in Na h-Eileanan Siar on our list.

If you need mastic sealing in HS2, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Nearby places we also cover include 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) for mastic joints. Island and remote sites need extra planning, with travel, ferry crossings where needed and weather to allow for, so mention the location when you call 01277 525 020 or send details through our quote form.

What’s near Upper Coll

Other landmarks nearby include Lewis Loom Centre (3.6 miles south-west) and Western Isles Hospital (3 miles south-west). Green spaces nearby include Loch Àirigh na Lic.

Map of Upper Coll © OpenStreetMap contributors
Accreditations

Trusted. Accredited. Insured.