Shetland Islands · Scotland
Sand mastic for sash & case windows in Clate, Shetland Islands
Sand mastic across Clate and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Gaps where the frame meets the masonry
- Crumbling sand mastic round a window
- A silicone bead on a sash window that spoils the look
Sand mastic for homes and businesses in Clate
We renew sand mastic around sash windows and doors set in stone or brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. Typical jobs include gaps between timber frames and stone or brick and gaps round a timber door in stone or brick, across tenement windows, period & listed homes and stone surrounds.
Outdoor sealant needs a dry surface, so window work around Clate is planned around the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Clate (ZE2)
- Wider area
- Shetland Islands
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What sealant work cannot fix
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Crumbling stone or brickwork round the window
- Broken panes
- Sashes that need overhauling
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before booking.
What we seal
- Sash and case windows
- Tenement windows
- Stone surrounds
- Brick reveals
- Period & listed homes
- Timber door frames
Clate questions
Is Clate in your area for sand mastic?
Yes, Clate is within the area we cover. We work across all of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
Does the coastal weather in Clate affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do you work for letting agents?
Yes. As well as householders, we work for landlords, agents, businesses and hotels across the Shetland Islands.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Is consent needed for window work on a listed home?
Checking first is sensible. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we are done.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. In a place like Clate, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why choose Mr Mastic in Clate
- Quality sealants from Arbo and Everbuild
- Approved under the ARBOMaster scheme
- Domestic, commercial and hotel work
- We never seal over old sealant
See our cost guide or our reviews.
What we are called out for in Clate
Shallow joints are a common cause. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
People normally contact us after spotting something like this:
- Tired mastic found when preparing windows for paint
- Modern sealant on a period surround
- Draughty sash windows at the surround
- Weathered mastic on the most exposed windows
Around Clate, as everywhere, sand mastic is only as good as the preparation behind it.
Questions to ask before you book
- How much experience the applicator has
- What happens if the job turns out different
- How long to leave it before use
- The length of the guarantee
What happens on the day
We keep the work tidy and contained to the area we’re working on. Expect the work to take anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. For a place like Clate, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
Getting a quote
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, email us at info@mrmastic.co.uk.
Related advice
Landlords, agents and businesses in Clate
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Frames and glazing around Clate
Clate is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
For jobs in and around Clate, choosing the right material for each joint is as important as a tidy finish.
Clate is about 13 miles north of Lerwick, in the Shetland Islands. Every kind of property in Clate can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. 63 places in the Shetland Islands are on our list, large and small.
All of ZE2 is within our area for sand mastic. We cover properties on Rocky Road and Harlsdale and the roads around them. We also cover Sandwick (1 mile north), Symbister (1 mile north), Hamister (1 mile north), Huxter (1 mile east) and Tripwell (2 miles north-east). Larger places within reach include Lerwick (13 miles south), Sound (14 miles south) and Brae (12 miles west). Island and remote addresses take a little more planning, so please mention your location when you drop us a line at info@mrmastic.co.uk.
Landmarks near Clate
For a walk, there’s Loch of Sandwick and Ward of Clett.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Ask us before painting near the mastic
- Avoid patching sand mastic with silicone
- Make sure water runs off the sill
- Go gently near the mastic when preparing windows
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
How we quote for sand mastic
Call for a quick quote. What matters most is:
- How much there is to do
- Working hours on commercial sites
- Whether the work is at height
- How many areas need sealing
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Asking for a quote
To make quoting easier, please include:
- Any previous sealing or DIY work
- The address or postcode of the job
- The rough size of the job
- Pictures of the joints, sent by email
Getting a quote is simple: tell us what needs doing and where. A few pictures by email make the job easier to understand.