Orkney Islands · Scotland
Sand mastic for sash & case windows in Grimeston, Orkney Islands
Specialist sand mastic for Grimeston: careful preparation, the right product and tidy work. Call for a quick quote.
- Mastic dropping out of the joint
- Gaps round a timber door in stone or brick
- Open joints round the window box
Sand mastic in Grimeston
Silicone on a period window often looks wrong and does not suit the building. Sand mastic is the traditional choice, and we can replace one with the other. If you have failed mastic on an exposed elevation and draughty sash windows at the surround, we can put it right, on sash and case windows, timber door frames and tenement windows alike.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Wind-driven rain finds any gap around a frame or sill, so the mastic there works hard.
Our work is backed for twelve months.
- Location
- Grimeston (KW17)
- Wider area
- Orkney Islands
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
When it is not the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Sashes that rattle, stick or will not open
- Damaged stone surrounds
- Decayed frames that need repair
If you’re not sure, just drop us a line at info@mrmastic.co.uk and we will give you a straight answer before booking.
Joints and surfaces we work on
- Period & listed homes
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals
- Tenement windows
Different surfaces, different methods
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Ask the planning authority about consent for listed or conservation-area homes
- Do not run silicone over sand mastic
- Don’t paint over the new mastic
- Go gently near the mastic when preparing windows
Don’t touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
Why it’s worth doing now in Grimeston
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Grimeston
- Arbo and Everbuild products
- Rated 4.9 stars on Google
- Anti-fungal sanitary silicone in wet areas
- More than 20 years in sealant work
Take a look at how sealant jobs are priced or customer reviews.
Common problems we fix in Grimeston
Some old mastic was never deep enough. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
Keep an eye out for any of the following:
- Window mastic to renew ahead of painting
- Draughty sash windows at the surround
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
For jobs in and around Grimeston, choosing the right material for each joint is as important as a tidy finish.
Before booking anyone
- Whether VAT is included
- Who does the work, and how experienced they are
- Whether they’re fully insured
- How the colour is chosen
Landlord and commercial work in Grimeston
Letting agents and landlords in Grimeston can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Windows and doors in Grimeston
Grimeston 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. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
Around Grimeston, as everywhere, sand mastic is only as good as the preparation behind it.
Grimeston is about 9 miles west of Kirkwall, in the Orkney Islands. Whether you’re in the middle of Grimeston or further out, sand mastic is available for homes and businesses alike. We cover 51 towns and villages across the Orkney Islands, large and small.
All of KW17 is within our area for sand mastic. Neighbouring places we cover for sand mastic include Bimbister (1 mile north-east), Harray (2 miles north), Stenness (2 miles south), Wasbister (2 miles west) and Russland (2 miles north). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
What’s near Grimeston
A little further out are Corrigall Farm Museum (3 miles north). Green spaces nearby include Hill of Heddle and Loch of Harray.
Grimeston questions
Does the coastal weather in Grimeston affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are generally the first to need attention.
Do you cover smaller places like Grimeston?
Yes. Grimeston is within the area we cover, which takes in towns, villages and rural addresses. We work across all 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.
How long does the job take?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer, and we will say how long yours will take.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do you work for landlords and businesses?
Yes, we do. We work in homes, commercial premises and hotels, and we are fully insured.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will talk you through it.
Other services in Grimeston
What happens on the day
On the day, we look over the joints with you first. Surfaces next to the work are protected before we start. Most jobs take a few hours per window, depending on the condition of the joints. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
- Mention any sign-in or site rules at work premises
Getting a quote
To get a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.