Shetland Islands · Scotland
Sand mastic for sash & case windows in Scalloway, Shetland Islands
Sand mastic across Scalloway and nearby, with old sealant always removed completely.
- Weathered mastic on the most exposed windows
- Wind and rain getting in round a sash window
- Mastic round period door frames that has failed
Sand mastic for homes and businesses in Scalloway
Sand mastic skins over fairly quickly but full hardening takes longer. Traditionally, sand mastic is left unpainted and we’ll advise if you are redecorating. We work on brick reveals, timber door frames and tenement windows, and the jobs we see most are modern sealant on a period surround and open joints round the window box.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Scalloway (ZE1)
- Wider area
- Shetland Islands
- Cover
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Keeping the joints in good condition
So the new joints stay in good condition:
- Keep sills and gutters clear so water drains away
- Plan mastic work ahead of painting
- Take care around the mastic when scraping paint
- Check the mastic when you check the paintwork
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Nearby places to Scalloway
More services for Scalloway
Surface by surface
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Scalloway homes and the weather
Scalloway is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Island jobs need planning around ferries and the weather, so give us as much notice as you can.
Around Scalloway, as everywhere, sand mastic is only as good as the preparation behind it.
Scalloway is in the Shetland Islands. We provide sand mastic to homes and businesses in Scalloway. Scalloway is one of 63 places in the Shetland Islands where we work.
Work in ZE1 is quoted and booked the same way as anywhere else. Streets in the area include Main Street, Craigpark Road and Meadowfield Road, and we cover them all. You will find Scalloway on the B9074, so it’s easy for us to get to. Other places close to Scalloway include Gulberwick (2 miles east), Hamnavoe (3 miles south-west), Veensgarth (3 miles north-east), Sound (4 miles east) and Toogs (4 miles south-west). Being one of the Shetland Islands’s larger places, Scalloway has homes, rented property and businesses of every kind. For island and remote addresses, a little more planning is needed, so let us know when you get in touch.
Local landmarks in Scalloway
In Scalloway, that means homes and buildings near Fisherman's Arms. Other landmarks nearby include Castle Holm (4.9 miles north) and Gilbert Bain Hospital (4.3 miles east). Not far away are Hill of Berry and Loch of Burwick.
What happens on the day
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere like Scalloway may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Let us know about parking restrictions
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
Getting a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and give you a clear quote.
Read more
What happens if it’s left?
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. In a place like Scalloway, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why Scalloway customers choose us
- Arbo and Everbuild products
- Over 20 years’ experience
- We never seal over old sealant
- We are fully insured
Read our cost guide or what customers say.
FAQs for Scalloway
Do you cover Scalloway for sand mastic?
Yes. We work across all of Scotland, and Scalloway is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job.
Does the coastal weather in Scalloway affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
I rent my home. Can I book you?
Of course. Ask your landlord first, and we can send them the quote if that helps.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
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 work on a listed home or in a conservation area.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
What’s sand mastic made of?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Signs you need sand mastic in Scalloway
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber and we normally remove them.
If you can see any of these, it’s time to have the joints looked at:
- Silicone on a period window that looks wrong
- Crumbling sand mastic round a window
- Weathered mastic on the most exposed windows
- Wind and rain getting in round a sash window
Homes close to Methodist Church include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
What your quote should include
- Whether the sealant suits the joint
- When the joint can take water or movement
- Are they insured?
- Whether VAT is included
What we cannot put right
A few problems are outside what sealant work can do:
- Sash cords, weights and draught-proofing of the sashes
- Decayed frames that need repair
- Whether work needs listed building consent
If you are not sure, just drop us a line at info@mrmastic.co.uk and we’ll give you a straight answer.
What we seal
- Stone surrounds
- Tenement windows
- Timber door frames
- Period & listed homes
- Brick reveals
- Sash and case windows