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

Gremista facade sealing

We carry out facade joint and window perimeter sealing on commercial buildings in Gremista. Send details for a fixed quote.

  • Sealant pulling away from frames or panels
  • Discoloured or dirty facade joints
  • Perimeter joints where frames meet the structure
1
Send details
Photos, drawings or a schedule, or we visit.
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.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Facade sealing in Gremista

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

About our facade sealing in Gremista

We don’t install glazing systems or replace glass. We handle the sealant joints that surround those elements: perimeter joints where frames meet the structure, panel joints and window perimeters with products suited to facade or glazing perimeter joints. We work on stone and brick facade joints, window and door perimeters and cladding panel joints, and the usual reasons a site gets in touch are perimeter sealant that has split or peeled away and air leaks through failed facade joints. A specialist sealant contractor works differently from a general builder: on jobs in Gremista, preparation and product choice get the time they need.

Sites near smaller places like Gremista can mean longer travel, so the mastic is planned with as few trips as the job allows. Send drawings, photographs and the programme so everything needed arrives on the first day.

The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Gremista (ZE1)
Wider area
Shetland Islands
Guarantee
12 months on our workmanship
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026

Signs you need facade sealing in Gremista

Product choice matters: acetoxy-cure silicone may mark stone or corrode certain metals, and an interior product won’t last outdoors. Most external joints call for a neutral-cure, facade-grade sealant.

Any of the following is a good reason to get the joints checked over:

  • Water coming in around window frames
  • Failed sealant on precast panel joints
  • Weathered facade joints that have lost their grip
  • Perimeter joints where frames meet the structure

New wings at hospitals like Montfield Hospital (1.2 miles south of Gremista) bring long runs of window and panel joints to seal.

Before you book anyone

  • Whether primer will be used where the manufacturer specifies it
  • The terms of the workmanship guarantee
  • Are they CHAS accredited or on Constructionline?
  • Will CSCS-carded applicators be on site?

How to choose a sealant contractor

Facade sealing around Gremista: points for this area

The sea is no more than about 1 mile from Gremista. Coastal exposure means perimeter and cladding joints work harder than on an inland job, and the sealant, primer and backing need choosing with that in mind. Island jobs, Gremista among them, are planned around the ferry and the forecast. Everything for the package travels with us, so drawings and quantities matter.

For contractors at a school such as Anderson High School, sealing has to be finished before term starts. Hotels like The Shetland Hotel (0.6 miles south of Gremista) rarely close for long, so refurbishment mastic is phased floor by floor.

Gremista is about 1 mile north of Lerwick, in the Shetland Islands. Commercial clients in Gremista can call on us for facade joints, as part of our coverage of the Shetland Islands. Gremista is one of 63 places we cover in the Shetland Islands.

Postcode districts covered here: ZE1 for facade joints. Streets here include Gremista Road, Arlanda Yard and Holmsgarth Brae, and sites on any of them can send details for a fixed quote. We also cover Heogan (1 mile east), Lerwick (1 mile south), Sound (2 miles south), Gunnista (2 miles east) and Veensgarth (2 miles 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.

Local landmarks in Gremista

Locally, jobs take us to sites close to Gilbertson Park. Other landmarks nearby include Montfield Hospital (1.2 miles south) and Shetland Textile Museum (less than half a mile south). Green spaces nearby include Loch of Kebister and Setter Hill.

Map of Gremista © OpenStreetMap contributors

What the job involves on each surface

Window and door perimeters

Frames grow and shrink with temperature, and the perimeter joint has to follow. Rod placed at the right depth lets the bead stretch as the frame moves.

Render and coated surfaces

Rendered and painted facades need a sound edge for the sealant to bond to. Loose coatings are cleaned back first, and areas needing repair are flagged.

Doing it in-house

The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.

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 usually costs more in the end than doing them right.

Why act early in Gremista

Patch repairs over old sealant tend to come back. A full cut-out and reseal costs more on the day but lasts much longer. Exposed buildings in Scotland take a lot of weather, and for a smaller place like Gremista, a repair visit takes planning, so it’s better to act early.

Cost follows what’s involved: stripping out, preparation, sealing, access and phasing. Call for a quote.

Why clients in Gremista choose us

  • Work carried out by CSCS-carded applicators
  • Work to your specification and the manufacturer’s guidance
  • Colours confirmed for the specified product
  • Old sealant cut out, never sealed over

Read our cost guide or our accreditations.

Questions about Gremista

Can being near the sea in Gremista affect the sealant we need?

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.

Can you take on a job at a hospital such as Montfield Hospital?

Yes, healthcare and care buildings are part of our work. Work is phased so departments keep running, under the site’s own rules.

Do you take on multi-site work?

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

Do you hold CHAS accreditation?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

Do you install glazing systems?

No. Glazing, windows and glass replacement aren’t part of our work. We seal the joints around them, such as perimeter joints where frames meet the structure.

Should we check old sealant for asbestos?

It’s worth checking in any building from before 2000. The dutyholder holds the asbestos register, so ask for it before we start. Suspect material is left alone until it has been tested.

How long do sealant joints last?

Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.

On site: what to expect

Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. For work around Gremista, we aim for one trip, so photos, sizes and a full list matter. External joints need a dry spell as well.

  1. We start with photos, drawings or a visit to see the joints and agree access.
  2. We confirm the joint type, movement and the specified product.
  3. Failed beads are removed in full and both faces cleaned back.
  4. Primer is applied where the maker specifies it.
  5. Rod goes in to fix the depth, then the joint is sealed and tooled.
  6. We go over the completed work with you before leaving.

Preparing the site

  • Tell staff and tenants when we will be in
  • Move anything stored against the joints
  • Send your site hours and access windows

Getting a fixed quote

Send us photographs, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

Ask for a quote

Advice

Building owners, agents and FMs in Gremista

Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.

CHAS accredited and a Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.

Accreditations

Trusted. Accredited. Insured.