Janetstown construction mastic
We carry out mastic packages for new-build and refurbishment projects in Janetstown and the surrounding area. Send details for a fixed quote.
- Frame perimeters left unsealed or poorly sealed
- External joints sealed in damp or cold conditions that are now failing
- Frame gaps too wide for sealant alone
Construction mastic across Janetstown
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our construction mastic in Janetstown
We work to the specification and the programme rather than whatever product is to hand. Where the specification names a product, we use it, and if an alternative is proposed, it goes to you for acceptance first. Joint widths, backing, primers and tooling follow the manufacturer’s guidance, so the joints perform as the designer intended. We work on sanitary and kitchen joints, brick and block movement joints and floor and skirting junctions, and what we are called in for most is external joints sealed in damp or cold conditions that are now failing and different trades sealing to different standards. Searching for sealant specialists in Janetstown? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
External sealing around Janetstown depends on dry faces and the right temperature. We build some give into the plan and agree it with the site manager.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Where
- Janetstown (KW14)
- Region
- Highland
- Cover
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
What we can’t put right
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Glazing units that are cracked or misted
- Approving fire stopping as compliant
- Specifying the product where the designer hasn’t
If in doubt, phone 01277 525 020 or email us and we’ll say what we think.
What we seal
- Floor and skirting junctions
- Window and door perimeters
- Internal decorators’ caulk
- Cladding and panel joints
- Sanitary and kitchen joints
- Brick and block movement joints
Mastic packages on Janetstown sites
Janetstown is within about 3 miles of the coast. Facades and window perimeters on coastal schemes take more wind-driven rain, and salt air nearer the shore, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. Janetstown is on Scotland’s drier eastern side. Cold, damp starts still stop external sealing on some days. External mastic is planned with the site manager for workable conditions.
For a contractor working at a hospital such as Dunbar Hospital, 1.8 miles to the north-east of Janetstown, perimeter and facade sealing is planned around patients and deliveries.
Janetstown is about 3 miles south-west of Thurso, in Highland. We cover commercial sites throughout Janetstown. 256 places across Highland fall within our area, including Janetstown.
Work on mastic packages is covered throughout KW14, for business premises of every kind. If your building is just outside Janetstown, we cover Glengolly (1 mile east), Westfield (2 miles south-west), Thurso (3 miles north-east), Scrabster (3 miles north) and Forss (3 miles north-west). Where a site is remote or on an island, travel and materials need planning ahead.
What’s near Janetstown
Janetstown’s nearest station is Thurso station, about 2.4 miles north-east. Other landmarks nearby include Dunbar Hospital (1.8 miles north-east) and Thurso Heritage Museum (2.7 miles north-east). Open spaces near Janetstown include Broubster Leans RSPB Reserve and Loch Calder.
Doing it in-house
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.
For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Your questions answered
Can being near the sea in Janetstown affect the sealant we need?
It can. Wind-driven rain and, closer to the shore, salt air are harder on external joints. We check the specified product suits the exposure and pay close attention to preparation.
Is Janetstown off your patch?
No. Small places get the same service as large ones. We cover the whole of Scotland. We plan jobs in smaller places so return trips are kept to a minimum.
What happens if the weather stops external sealing?
External sealant needs a dry joint and a temperature within the product’s range. Damp, frost or condensation on frames can stop work.
Is any job too small?
Whatever the size, the process is the same: details, then a fixed price, then sealing, then a 12-month guarantee.
Do you offer coloured sealant?
It depends on the product. Some ranges are wide, others limited, so the available colours are confirmed with the quote.
How do you deal with asbestos in old sealant?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and work stops until any suspect material has been tested. We don’t remove asbestos-containing materials.
Do you work to architects’ specifications?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and we raise anything unclear before work begins.
Building owners, agents and FMs in Janetstown
We work for building owners and managing agents on sealant work across single buildings or whole portfolios around Janetstown. Several sites can go on one quote, so there’s one set of paperwork to deal with.
For main contractors, we work as the sealant subcontractor. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
Different surfaces, different methods
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 while moving joints need a flexible sealant.
Bathrooms, en suites and washrooms
Sanitary joints around baths, showers, basins and WCs need anti-mould sanitary silicone. Each joint is prepared, sealed and finished with a neat tooled line, and any bath is loaded with water first where that’s the agreed method.
From enquiry to sign-off
Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on 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 Janetstown, directions, keys and a contact on the day are worth sorting early. That goes into the plan alongside the quote.
- Drawings, specification and programme come to us.
- We take off quantities and return a fixed quote.
- We agree with the site team which areas come first.
- Each area is sealed when it’s released.
- Joints are prepared, backed and sealed to the specification.
- Snags are cleared and the package signed off with our 12-month guarantee.
Preparing the site
- Warn occupants and staff about the work
- Arrange parking or a loading space
- Send asbestos survey details if the building is pre-2000
Getting a fixed quote
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.
Advice
What else we do in Janetstown
When to call us in Janetstown
Value-engineered products sometimes end up in the wrong joints. A general-purpose silicone on a facade or a caulk in a wet area won’t perform like the specified product. We use what’s specified, and any substitute goes to you for acceptance.
If one of these sounds familiar, it’s time for a closer look:
- External joints sealed in damp or cold conditions that are now failing
- Window and door perimeters that won’t pass inspection
- Bath and shower joints scraped during the final clean
- Failed sealant in an existing building being refurbished
For contractors at a school such as Thurso High School, sealing has to be finished before term starts.
Before you book anyone
- Is the sealant right for the movement and the substrate?
- Health and safety accreditation such as CHAS
- How long is the guarantee, and what does it include?
- How joint depth will be controlled