Shetland Islands · Scotland
Baltasound Sand Mastic
Professional sand mastic in and around Baltasound, with old sealant always removed completely and a 12-month guarantee.
- Gaps between timber frames and stone or brick
- Modern sealant on a period surround
- Mastic round period door frames that has failed
Looking after it afterwards
Aftercare is simple:
- Clear gutters so water doesn’t pour onto the windows
- Ask us before painting near the mastic
- Take care around the mastic when scraping paint
- Avoid patching sand mastic with silicone
Do not touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.
Sand mastic for homes and businesses in Baltasound
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes where a modern sealant bead would stand out. We work on timber door frames, sash and case windows and tenement windows, and people most often call us about mastic dropping out of the joint and tired mastic found when preparing windows for paint.
Mastic can only go onto a dry joint, so outside work in Baltasound depends on the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Baltasound (ZE2)
- Region
- Shetland Islands
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Frames and glazing around Baltasound
Baltasound is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
Managing a site like Baltasound Junior High School? Then its window and door frames need their mastic kept sound, just like a home’s.
Baltasound is in the Shetland Islands. We provide sand mastic to homeowners, landlords and businesses in Baltasound and the surrounding area, as part of our work across the Shetland Islands. Across the Shetland Islands, we cover 63 places, and Baltasound is one of them.
Postcode districts we cover here for sand mastic: ZE2. Whether your property is on Setters Hill Estate, Curlew Avenue and Cormorant Way or a nearby road, our applicators can take on the job. Neighbouring places we cover for sand mastic include Haroldswick (3 miles north-east), Clivocast (6 miles south), Cullivoe (6 miles south-west), Houbie (11 miles south) and Camb (12 miles south-west). Baltasound is one of the larger places we cover in the Shetland Islands. 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.
Around Baltasound
Other landmarks nearby include Unst Boat Haven (2.1 miles north-east). Green spaces nearby include Loch of Beiton and Muckle Heog.
Surface by surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Stone surrounds
The stone is treated with care when the old mastic comes out.
Other services in Baltasound
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Sashes that rattle, stick or won’t open
- Broken panes
- Damaged stone surrounds
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
Surfaces we seal
- Brick reveals
- Tenement windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Sash and case windows
What affects the quote in Baltasound
There’s no set price list. What we look at:
- Mould in or behind the old joints
- The number and length of the joints
- How easy the joints are to reach
- How many areas need sealing
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- The address or postcode of the job
- Roughly how big the job is
- The problem you’ve noticed
- If someone has resealed it before
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Signs you need sand mastic in Baltasound
Timber frames move with the seasons. The movement cracks the mastic over time.
Any of these means the joints need attention:
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
In the older streets around Kirkhoull, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- How the colour is chosen
- Whether they’re fully insured
- The length of the guarantee
- Who does the work, and how experienced they are
Baltasound questions
Is Baltasound in your area for sand mastic?
Yes, Baltasound is within the area we cover. Our work covers the whole of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job.
Is sand mastic in a coastal place like Baltasound any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
How long does sand mastic take to harden?
The surface skins quite quickly and it hardens fully over a longer time. Timing depends on the weather and the joint.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. The old silicone has to come out completely so the mastic can sit properly.
Do you guarantee sand mastic work?
Our one-year guarantee covers every job.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
How it works
Before we leave, we go over the finished joints with you and tell you how long to leave it. The visit itself usually takes a few hours for a single window, longer for several, depending on the amount of work. Around Baltasound, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Clear the area around the work
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.