Mastic contractors in Shawbost
Mastic packages for new-build and refurbishment projects in Shawbost and across Na h-Eileanan Siar. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Caulk cracking where joints are moving more than expected
- Missed perimeter joints on a new elevation
- Different trades sealing to different standards
Construction mastic across Shawbost
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Construction mastic in Shawbost
On refurbishments, the mastic package typically 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. If you are dealing with sanitary sealant damaged by following trades and internal caulk splitting as the building dries out, we can help, whatever the surface. A single leaking joint is often how a building in Shawbost first comes to us: we look at the rest while we’re there and tell you what we find.
For a site around Shawbost, we plan the mastic in as few trips as the programme allows. Clear drawings, a programme and photographs let us bring the right sealants, primers and backing rod first time.
Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Place
- Shawbost (HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- 12 months on our workmanship
- Quotes
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Should maintenance staff do it?
Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.
Some joints are best left to specialists: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
When it isn’t the sealant
We check first that sealant really is the fix. It isn’t the answer for:
- Frames fitted out of tolerance
- Specifying the product where the designer hasn’t
- Deciding which fire-stopping product a penetration needs
If in doubt, call the office on 01277 525 020 or email a schedule or drawings and we will say what we think.
Surfaces we seal
- Internal decorators’ caulk
- Sanitary and kitchen joints
- Cladding and panel joints
- Brick and block movement joints
- Floor and skirting junctions
- Window and door perimeters
Building and refurbishing in Shawbost
Shawbost is within about 2 miles of the coast. 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. The west of Scotland, where Shawbost is, gets more rain than the east. External mastic needs dry spells, with internal work ready to fill the wet days.
Around Shawbost, as anywhere, a facade joint depends on its sizing, backing rod and preparation. Sites around Shawbost get mastic sealed to the drawings and the programme, nothing improvised.
Shawbost (Gaelic: Siabost) is in Na h-Eileanan Siar. Anywhere in HS2, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 87 places in Na h-Eileanan Siar.
Commercial sites across HS2 are covered for mastic packages. We cover commercial and managed buildings on Rathad Ghrinnibhat, Cnoc a Charnain and Sraid na H-Eaglaise and the roads nearby. Sites close to Shawbost are covered too, including 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 mention the location when you give us a call on 01277 525 020 or send photos by email.
Near you in Shawbost
Other landmarks nearby include Shawbost Folk Museum (0.7 miles north-east). For a walk, there’s Loch a' Bhaile.
Nearby places to Shawbost
Other services in Shawbost
Work for main contractors and building owners
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Shawbost can sit alongside others in a wider programme across Na h-Eileanan Siar.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.
Our process
Where the site stays busy, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then reopened once the sealant allows before the next one starts. Travel to smaller Scottish places like Shawbost is planned so the job is finished in one visit where possible, which is why we ask for photographs and a full list first. External joints need a dry spell as well.
- We start with the drawings, specification and programme.
- We take off quantities and return a fixed quote.
- The sequence is agreed with the site manager.
- Each area is sealed when it’s released.
- Every joint is cleaned, set to depth and sealed with the specified product.
- After snagging, the work is handed over under our 12-month guarantee.
Before we start on site
- Let building users know which areas are affected
- Arrange parking or a loading space
- Send your site hours and access windows
Ask for a quote
For a fixed quote, give us a call on 01277 525 020 or send photos by email. Our quote form is another easy route.
Advice
Questions about Shawbost
Will you fit the mastic around our build programme in Shawbost?
Yes, we work to the programme and the sequence the site sets. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Can being near the sea in Shawbost affect the sealant we need?
It can. Coastal exposure works external joints harder than inland weather. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.
Can you come in just for snagging?
Yes. Share the list and photos, and a fixed quote follows, then clear it to your programme.
What about RAMS and site documents?
Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm them with the quote.
Do you install fire-rated sealant as part of a package?
It can be part of the package where specified. Tell us what records you need and we will confirm with the quote.
Can you seal external joints in wet or cold weather?
External sealant needs a dry joint and a temperature within the product’s range. Damp, frost or condensation on frames can stop work.
Is the mastic package guaranteed?
Our workmanship carries a 12-month guarantee from sign-off. The guarantee covers our work, not later damage by other trades.
Why deal with it now?
On a refurbishment, there’s a choice between resealing existing frames and replacing them. Sound frames often need only a new perimeter seal, which is a much smaller cost. If the frame is life-expired, we’ll tell you. Exposed buildings in Scotland take a lot of weather, and for a smaller place like Shawbost, a repair visit takes planning, so it’s better to act early.
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we will put a fixed figure on it.
Why us?
- Constructionline member
- CHAS accredited
- One phone line for London, the South East and Scotland
- Colour options checked against the specified product
After the work
Cleaning and maintenance staff play a part too. Share these points with them:
- Ask installers to correct oversized gaps first
- Plan external elevations with the weather in mind
- Bring the mastic contractor in after the last trades are through
- Use the product the specification names
At handover, keep the product details with the O&M information. That helps the building owner maintain the joints later, and tells you what to reseal with. Tell us what records you need and we will confirm with the quote.
External joints sealed in poor weather are a common cause of early failure. Holding off until conditions suit avoids callbacks, so we plan external work with that in mind.