Shetland Islands · Scotland
Sand Mastic in Walls
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Walls. Fully insured, ARBOMaster approved and guaranteed for a year.
- A silicone bead on a sash window that spoils the look
- Mastic that needs renewing before redecorating
- Cement or filler used on old window joints that has cracked
Sand mastic for homes and businesses in Walls
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted, so ask us before you decorate. Common call-outs are for a silicone bead on a sash window that spoils the look and tired mastic found when preparing windows for paint, across brick reveals, period & listed homes and timber door frames.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
You get a 12-month guarantee, the same in Walls as everywhere else we work.
- Where
- Walls (ZE2)
- Region
- Shetland Islands
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Landlord and commercial work in Walls
We work for landlords and letting agents as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
We also work for property managers and facilities teams. Several sites can be quoted together.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
Also in Walls
How we quote for sand mastic
Call for a quick quote. The main things that affect it are:
- Working hours on commercial sites
- Whether there’s mould to deal with
- Which sealant suits the joint
- Whether the work is at height
Doing several joints on one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that is easy
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’ll explain what’s involved before giving you a price.
What sand mastic looks like in Walls
Walls is close to 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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that.
Around Walls, as everywhere, sand mastic is only as good as the preparation behind it.
Walls is in the Shetland Islands. Anywhere in ZE2, we cover sand mastic for homes and businesses. Walls is one of 63 towns and villages in the Shetland Islands we cover.
Here we cover the ZE2 postcode area for sand mastic. Whether your property is on New Road, Vagaland and Pier Road or a nearby road, we can help. If you’re just outside Walls, we cover Easter Skeld (5 miles south-east), Sandness (6 miles north-west), Melby (6 miles north-west), Aith (8 miles north-east) and Kalliness (9 miles east). Within a short drive, we also cover Lerwick (15 miles east), Sound (15 miles south-east), Scalloway (12 miles south-east) and Brae (14 miles north-east). Island and remote addresses take a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
Near you in Walls
For a walk, there’s Loch of Bardister and Ward of Culswick.
Common questions in Walls
Does the coastal weather in Walls 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 generally the first to need attention.
Will you come out to Walls?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland, including the islands, where work is planned around ferry crossings. Let us know about access, parking and anything unusual about getting there when you book.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
How long will you be here?
Most jobs take a few hours for a single window, longer for several, including the preparation. We’ll confirm how long when we quote.
Can I add another job to the visit?
Yes. Just list everything you need and we will quote it together.
The process
We keep the work tidy and contained to the joints we are treating. 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. Somewhere like Walls may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Tell us about any water getting in
- Mention if the joints have been sealed before
- Move anything stored near the joints
How to get a quote
If you are in Walls and need sand mastic, drop us a line at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Read more
Signs you need sand mastic in Walls
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
People generally contact us after spotting one of these:
- Draughts and rain around sash boxes
- Modern sealant on a period surround
- Cracked mastic round a front door frame
- Cement or filler used on old window joints that has cracked
Whether the job is in Walls itself or nearby, the right material for each joint matters as much as a neat finish.
What your quote should include
- Who turns up on the day
- Is VAT in the price?
- Which colour the sealant will be
- Whether they seal over old material or remove it
Why deal with it now?
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water behind a failed seal does the most damage when nobody’s watching.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please send an email to info@mrmastic.co.uk and we will talk you through it.
Why Walls customers choose us
- A 12-month guarantee on all work
- We leave the area clean and tidy
- We’re fully insured
- Rated 4.9 stars on Google
Take a look at what affects the cost and what customers say.
What we cannot put right
To be straight with you, some problems need a different trade:
- Sashes that rattle, stick or won’t open
- Decayed frames that need repair
- Cracked or broken glass
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think.
Joints and surfaces we work on
- Tenement windows
- Brick reveals
- Timber door frames
- Stone surrounds
- Period & listed homes
- Sash and case windows