Mastic Sealing in Shawbost
Mastic sealing for building owners, managing agents and housing associations in Shawbost. CHAS accredited and fully insured, with a 12-month guarantee.
- Damp patches beside frames
- Occupiers reporting cold air round windows
- Cracked, hardened mastic round windows on a block
Mastic sealing near Shawbost
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Mastic sealing in Shawbost, done properly
Treatment starts with a proper look: which joints have failed, why, and whether sealant is the right answer. Failed mastic is stripped, the faces taken back to sound material, primed where the manufacturer specifies and resealed and backing rod used wherever a joint is deep. If you have patchy repairs in mismatched sealant and communal area joints that look neglected, we can put it right, whatever the surface. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Shawbost it comes down to the same thing: the right product in a properly prepared joint.
Travel to smaller places like Shawbost is planned so several buildings can be done on one trip. A list of addresses and photos lets us quote for them together.
What our 12-month guarantee covers is the way we did the job: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Where
- Shawbost (HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- A 12-month guarantee
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Mastic sealing around Shawbost: how the place shapes the job
Shawbost lies within about 2 miles of the sea. Blocks and commercial buildings facing the sea take the most weather on their window perimeters and external joints, so it’s worth inspecting those sides more often. Work on Shawbost has to fit the ferry timetable and the forecast. We group island buildings so each crossing covers as much as possible.
Wherever your building is in or near Shawbost, we look at the whole elevation before quoting, so you know what needs doing now.
Shawbost (Gaelic: Siabost) is in Na h-Eileanan Siar. We cover Shawbost, with the same fixed quotes and 12-month guarantee as everywhere else. Shawbost is one of 87 places we cover in Na h-Eileanan Siar for mastic joints.
We take on mastic joints across the HS2 postcode area, for business premises of every kind. If your site is on Rathad Ghrinnibhat, Cnoc a Charnain and Sraid na H-Eaglaise or close by, send details and we will quote for mastic joints. If your building is just outside Shawbost, we cover Bragar (2 miles north-east), Na Gearrannan (4 miles south-west), Carloway (4 miles south-west), Barabhas (7 miles east) and West Side (7 miles east). Remote and island addresses take more planning, from travel and ferries to the weather, so give the site location in your enquiry.
Around Shawbost
Well-known places in the area include Shawbost Folk Museum (0.7 miles north-east). For a walk, there’s Loch a' Bhaile.
For managing agents and facilities managers
When you manage a building on behalf of an owner, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Shawbost can form part of a wider programme.
Why act early in Shawbost
Open external joints let water into walls and around frames. Damp patches, stained plaster and decorating claims can follow and those cost far more to put right. Exposed buildings in Scotland take a lot of weather, so it’s worth renewing joints around Shawbost before they leak.
The specified product makes a difference, as does the preparation each joint needs. Access, phasing and site rules also count.
Why clients in Shawbost choose us
- Standard and matched colours in many product ranges
- 12-month guarantee on workmanship
- RAL and finish matching where the product range allows
- CHAS accredited contractor
Read how commercial sealant jobs are priced or our accreditations and insurance.
When it isn’t the sealant
Not every problem is a sealant problem, and we’re upfront when that’s the case. These need a different solution:
- Broken glass or failed sealed units
- Masonry that has broken away beside the joint
- Asbestos-containing sealant, which we don’t remove
If in doubt, call 01277 525 020 or email drawings and photos and we’ll say what we think before you book.
Surfaces we seal
- Communal kitchens and washrooms
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Communal entrances and stairwells
- External wall and movement joints
- Balcony and threshold joints
Questions we are asked in Shawbost
Do you take on block-wide or estate-wide mastic work in Shawbost?
Yes. Planned programmes across a building, block or estate are a core part of this service. We can phase the programme to suit your budgets and notice periods.
Does the sea air around Shawbost change the choice of sealant?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.
How long before the joints can be used?
Curing time varies by product, and we confirm it on the day, and sign any area that should be left alone.
Can you send RAMS and CSCS details before starting?
We’re CHAS accredited, a Constructionline member and carry public liability insurance. For specific documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.
How do you choose the sealant?
A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
How many days will you need on site?
We plan the time on site around your programme and access. We will give you an estimate of time on site when we quote.
Will residents or tenants be disturbed?
We plan around people living or working in the building. We agree the programme so you can notify occupiers, and entrances stay in use.
Cost factors for mastic joints
To price the job, we consider:
- How much existing material needs removing
- Backing rod, priming and other preparation
- Which sealant the job calls for
- Location, for remote and island sites
Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.
What to include in your enquiry
However big the job, the same details help:
- Your programme or deadline
- The site address and postcode
- What the building is and how it’s used
- Anything awkward about access or site hours
Send us photographs, drawings or a joint schedule are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.
On site: what to expect
In a busy building, we agree a sequence with your contact so the disruption stays in one area at once. Each section is protected, cleaned back and sealed before the next one starts. For work around Shawbost, we aim for one trip, which is why we ask for photographs and a full list first. Outside work also needs a suitable weather window.
- We inspect the joints, building by building, and record what has failed and why.
- We send a fixed quote that sets out the joints, the products and the programme.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- Failed mastic is removed and the faces taken back to sound, dry material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
Preparing the site
- Tell us which areas need to stay in use
- Tell us what induction or permit system the site runs
- Send any specification or drawings in advance
Get a fixed quote
Specifications, drawings and tender packages are welcome with any enquiry, and we will price against exactly what is specified. Smaller jobs need nothing more than photographs and a few notes.
Read more
Towns and villages near Shawbost
What else we do in Shawbost
Common problems we fix in Shawbost
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 it tears.
Most enquiries start with something like this:
- Draughts at frames across a block
- The same joint failures repeated across a portfolio
- No planned programme for sealant
- Window mastic that has split and shrunk
For owners and agents with buildings in or around Shawbost, block-wide mastic programmes deal with frames and external joints of the same age together.
Comparing quotes
- How long is the guarantee, and what does it include?
- How they’ll work around occupants
- Whether old or failed sealant will be cut out, not overlaid
- Will CSCS-carded applicators be on site?