Shetland Islands · Scotland
Haroldswick New Build Mastic
Professional new build mastic in and around Haroldswick, with old sealant always removed completely and a 12-month guarantee.
- Frame joints opening as the plaster dries
- Skirting joints opening in the first winter
- Sealant applied over dusty or wet surfaces
About our new build mastic in Haroldswick
New homes move as they dry out. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. If you are dealing with kitchen sealant that has pulled off the wall and cracked sealant around new window and door frames, we can put it right, whatever the surface.
Many newer homes in Scotland are timber-framed and settle as they dry out, which shows as gaps at skirtings and floor joints. In older homes, timber floors move through the year too.
Every job is covered by our 12-month guarantee, wherever you are in the Shetland Islands.
- Location
- Haroldswick (ZE2)
- Region
- Shetland Islands
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
We also work for property managers and facilities teams in Haroldswick and across the Shetland Islands. Several sites can be quoted together.
What happens if it’s left?
Resealing everything on a snagging list in one visit is normally simpler than chasing joints one at a time. It’s one visit, one quote and one set of cure times for the lot. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Leaving a failed joint generally makes the job bigger, not smaller. If you’re unsure, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
Why Haroldswick clients choose us
- Old sealant always removed completely
- Homes, businesses and hotels
- Arbo and Everbuild products
- A 12-month guarantee on all work
What new build mastic looks like in Haroldswick
Haroldswick is within about 2 miles of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. Island jobs need planning around ferries and the weather, so the more notice, the better.
In and around Haroldswick, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Haroldswick is in the Shetland Islands. We provide new build mastic to homes and businesses in Haroldswick and nearby. 63 places in the Shetland Islands are on our list, from the larger towns to small villages.
We cover every part of ZE2 for new build mastic. Whether your property is on Taftens, Nordabrake and Brakefield Crescent or a nearby road, our applicators can take on the job. Being close to the B9087, Haroldswick is easy for our applicators to reach. Neighbouring places we cover for new build mastic include Baltasound (3 miles south-west), Clivocast (8 miles south), Cullivoe (9 miles south-west), Houbie (14 miles south) and Camb (15 miles south-west). If you’re somewhere remote, the job takes a little more planning, so let us know when you get in touch.
Local landmarks in Haroldswick
Nearby you’ll also find Unst Heritage Centre (0.6 miles south-west). For a walk, there’s Little Heog and Loomer Shun.
Other services in Haroldswick
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
What we can’t put right
To be straight with you, some problems need a different trade:
- Cracking that points to a structural problem
- Deciding who is responsible under a builder’s warranty
- Broken tiles or a split tray
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before booking.
Joints and surfaces we work on
- Skirting & floors
- Plot handovers
- Kitchens
- Show homes
- Windows & doors
- Bathrooms & en suites
How it works
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work starts. The work generally takes a few hours in a single home. Outdoor work around Haroldswick depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
- Mention any tricky access
Ask for a quote
Want a quote for new build mastic? Please send an email to info@mrmastic.co.uk with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Your questions about new build mastic in Haroldswick
Do you cover Haroldswick for new build mastic?
Yes. Our work covers the whole of Scotland, and Haroldswick is part of that. You can email us at info@mrmastic.co.uk and let us know what needs doing, and we will give you a clear quote.
Is Haroldswick within the area you cover?
Yes, we do. We work across all of Scotland, islands included, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Why does sealant fail so quickly in new builds?
Lots of new homes see sealant crack early. Rushed application on dusty surfaces makes it worse.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Which products do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
When to call us in Haroldswick
Sealant applied onto damp surfaces doesn’t bond well. Site programmes don’t always leave time for joints to dry before the sealant goes on.
People usually contact us when they notice one of these:
- Skirting joints opening in the first winter
- Cracked sealant around new window and door frames
- Sealant applied over dusty or wet surfaces
- Leaking shower tray seals in a new home
Whether the job is in Haroldswick itself or nearby, the right material for each joint matters as much as a neat finish.
What to look for in a quote
- Whether all the old sealant comes out first
- What preparation is included
- How the colour is chosen
- What the quote includes, VAT included or not
How we quote for new build mastic
Call for a quick quote. The main things that affect it are:
- The old material and how stubborn it is
- How easy the joints are to reach
- Working hours on commercial sites
- The size of the job
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- A few pictures by email, if you can
- Whether it has been sealed before
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, email us at info@mrmastic.co.uk.