The Mastic Doctor team standing beside their branded vans outside an office building
Shetland Islands · Scotland

Gunnista washroom sealing

Sealing in commercial washrooms, showers, kitchens and wet areas throughout Gunnista and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Black mould inside silicone joints that cleaning can’t shift
  • Failed sealant behind washroom basins
  • Open joints at the base of cubicle panels
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Washroom sealing for Gunnista sites

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Washroom sealing in Gunnista, done properly

Our washroom work covers offices, hotels, schools and colleges, leisure centres and gyms, clinics and care homes, plus the kitchens and tea points that go with them. The products and the method are chosen for how heavily each space is used. If you’re dealing with kitchen worktop joints that can’t be kept clean and failed sealant behind washroom basins, we can put it right, whatever the surface. Whoever orders the work in Gunnista, the brief is usually the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

In smaller Scottish places like Gunnista, commercial washrooms are typically in hotels, pubs, schools, care homes and community halls. Mould grows into sealant in any wet room that doesn’t dry out, and the answer is removal and a fresh bead of anti-mould silicone.

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
Location
Gunnista (ZE2)
Wider area
Shetland Islands
Cover
12 months on our workmanship
Quotes
A fixed quote before we start
Call
01277 525 020
Page updated
3 November 2026

For managing agents and facilities managers

We work for building owners and managing agents on everything from one building to a spread of sites around Gunnista. Several sites can go on one quote, which keeps the paperwork simple.

For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.

What we can’t put right

A proper diagnosis includes knowing what sealant can’t do. We’ll tell you if the real problem is one of these:

  • Water from plumbing, not from a joint
  • Loose panels, vanity units or tiles, which need fixing first
  • Water escaping beneath the floor rather than through a joint

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

Joints and surfaces we work on

  • Urinals and WCs
  • Kitchens and tea points
  • Accessible toilets and changing rooms
  • IPS panels and cubicles
  • Vanity units and basins
  • Showers, trays and wet room floors

What we’re called out for in Gunnista

Daily commercial cleaning wears sealant faster than people expect. Harsh products, abrasive pads and pressure washing break down a joint’s surface and edges so grime sticks to the damaged surface.

It’s worth sending us details if you spot any of the following:

  • Failed sealant in a tea point or staff kitchen
  • Sealant stained black around basins and showers
  • Open joints along basins and vanity units
  • Resealing that didn’t last because the old bead stayed

For a hotel such as Maryfield House Hotel, 1.3 miles to the south-west of Gunnista, resealing en suites a few rooms at a time keeps the rest available.

What your quote should include

  • Whether primer will be used where the manufacturer specifies it
  • Their pre-qualification and accreditations
  • Whether old or failed sealant will be cut out, not overlaid
  • What the guarantee covers, and for how long

Questions to ask before you appoint anyone

Questions about Gunnista

Will our hotel in Gunnista need to close for the work?

In the majority of cases no closure is needed: we work room by room or floor by floor. Tell us your quiet periods and access windows and we will plan around them.

Is Gunnista inside the area you cover, given it’s on an island?

Yes. Every Scottish council area is within our area, and that includes island locations such as Gunnista. We plan island jobs around the ferry and the forecast, and bring everything the job needs on the first crossing.

Are you fully insured?

Yes. Our insurance certificate can be sent alongside the quote.

Can one quote cover more than one building?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

How long does a typical visit take?

We plan the time on site around your programme and access. You will have an expected duration with the quote.

Will your applicators have CSCS cards?

Yes. We use CSCS-carded applicators.

Can you send site paperwork?

Requirements differ from site to site, so tell us what you need and we’ll confirm it when we quote.

Quoting for work in Gunnista

Sealant work doesn’t have a standard rate, because every site is different. What we look at:

  • The size and state of each joint
  • Site requirements such as inductions and permits
  • Whether the work must be split into stages
  • Which sealant the job calls for

Cost follows what’s involved: stripping out, preparation, sealing, access and phasing. Call for a fixed quote and we will explain how it’s made up.

What we need to price the job

There’s no need for a formal survey. These details are enough to start:

  • Your programme or deadline
  • How the joints are reached, and at what height
  • The site address and postcode
  • Asbestos survey details if the building is older

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or email us.

Keeping Gunnista washrooms open while we work

Gunnista sits close to the coast, within about 1 mile, and coastal hotels, guest houses and holiday sites tend to fill up in the busy months. Heavy seasonal use is hard on shower and basin sealant, which is why off-season resealing makes sense. The east of Scotland, where Gunnista is, gets less rain than the west. Inside, ventilation and use decide how fast washroom sealant moulds, whatever the weather.

For a site such as Montfield Hospital, 2.2 miles to the south-west of Gunnista, sanitary joints in clinical areas need sound, cleanable sealant and a careful method. Church halls and community buildings, such as those at St Ola's Church and burial-ground, have kitchens and toilets used by many groups, and their sanitary sealant works hard.

Gunnista is in the Shetland Islands. We cover commercial sites throughout Gunnista, whether it’s a single job or part of a planned programme. Gunnista is one of 63 places in the Shetland Islands on our list.

Anyone looking for washroom sealing in ZE2 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Close to Gunnista, our area also takes in Heogan (1 mile west), Gremista (2 miles west), Grindiscol (2 miles south), Lerwick (2 miles south-west) and Sound (3 miles south-west). Island and remote sites need extra planning, with travel, ferry crossings where needed and weather to allow for, so give the site location in your enquiry.

Landmarks near Gunnista

Nearby you will also find Shetland Museum (2 miles south-west) and Montfield Hospital (2.2 miles south-west). For a walk, there’s Loch of Aith.

Map of Gunnista © OpenStreetMap contributors

From enquiry to sign-off

Occupied buildings need a little choreography. We sign and contain the area we are in, keep walkways clear and move on in phases so staff and visitors can carry on around us. Travel to smaller Scottish places like Gunnista is planned so the job is finished in one visit where possible, so photographs, sizes and a full list matter. Outside work also needs a suitable weather window.

  1. We start by inspecting the fittings and joints and flagging problems sealant can’t solve.
  2. We agree which rooms close and when, so users always have somewhere to go.
  3. The failed silicone is stripped and every face scraped clean of residue.
  4. Each joint is degreased and left dry, because silicone won’t bond to damp or soapy surfaces.
  5. We lay a sanitary silicone bead and tool it smooth so it is easy to clean.
  6. Rooms reopen after the product’s cure time, and we move to the next.

Preparing the site

  • Flag any permit to work we will need
  • Agree which areas must stay open
  • Explain the parking and delivery arrangements

Quotes

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to give us a call on 01277 525 020 or email us with what you know.

Get a quick quote

Related advice

Site staff or a sealant specialist?

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong normally costs more in the end than doing them right.

General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

Accreditations

Trusted. Accredited. Insured.