Argyll and Bute · Scotland
Black Crofts Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Black Crofts, backed by a one-year guarantee. Ask us for a quote.
- Failed mastic on an exposed elevation
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Go gently near the mastic when preparing windows
- Leave the new mastic unpainted
- Find out about consent before window work on a listed home
- Renew mastic before redecorating the windows
Don’t touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Sand mastic in Black Crofts, done properly
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. If you are dealing with gaps between timber frames and stone or brick and failed mastic on an exposed elevation, we can help, whatever the surface.
Outdoor sealant needs a dry surface, so window work around Black Crofts is planned around the weather. Let us know about access to every frame, including any upstairs.
Big or small, it’s backed by our one-year guarantee in Black Crofts and across Argyll and Bute.
- Location
- Black Crofts (PA37)
- Wider area
- Argyll and Bute
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Common problems we fix in Black Crofts
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
Signs it’s time to call us include:
- Mastic that needs renewing before redecorating
- Old sand mastic that has cracked, crumbled or fallen out
- Patchy fillers round a sash window
- Gaps between timber frames and stone or brick
Homes close to Ardchattan Parish Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- What the cure time is
- What happens if they find a problem under the old sealant
- Whether they’re fully insured
- How the surfaces are prepared before sealing
What affects the quote in Black Crofts
The quote reflects the job in front of us. We look at:
- Access and height
- The old material and how stubborn it is
- The product the joint needs
- Any mould that needs treating
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What to tell us for a quote
When you call or email, it’s useful to know:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- If someone has resealed it before
- The type of property
For sand mastic in Black Crofts, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Frames and glazing around Black Crofts
Black Crofts 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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
If you let a flat or house near Connel Ferry station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Black Crofts is about 40 miles north-west of Helensburgh, in Argyll and Bute. We provide sand mastic to homes and businesses in Black Crofts and the surrounding area, as part of our work across Argyll and Bute. 118 places in Argyll and Bute are on our list, large and small. Our Glasgow page covers work nearby, about 60 miles away.
Jobs for sand mastic in PA37 works the same way as everywhere else we cover. Close by, we work in Ardchattan (1 mile north-east), North Connel (1 mile south-west), Connel (2 miles south-west), Benderloch (2 miles north-west) and Dunbeg (4 miles south-west). For island and remote addresses, a little more planning is needed, so let us know when you get in touch.
What’s near Black Crofts
The nearest railway station is Connel Ferry station, roughly 1.4 miles south-west. Nearby you’ll also find Dunstaffnage Castle (3 miles west). For a walk, there’s Lochan Dubh.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Planning or listed building consent (your local planning authority decides)
- Timber that has rotted
- Masonry that needs repairing
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly.
Surfaces we seal
- Tenement windows
- Timber door frames
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
Surface by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Black Crofts: your questions answered
I let a flat near Connel Ferry station. Can you help?
Yes, we work for landlords and letting agents. Just drop us a line at info@mrmastic.co.uk and tell us about the property, and we’ll give you a clear price.
Will you come out to Black Crofts?
Yes, Black Crofts is covered. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Should I check with the council before work on a listed or conservation-area home?
Your local planning authority is the one to ask. They decide whether consent is needed for work to your windows.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Are you fully insured?
Yes. We are fully insured for every job we do.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Nearby places to Black Crofts
More services for Black Crofts
How the visit works
You don’t need to clear the whole room or building before we come, only the area right around the joints. We protect the rest, and the job takes a few hours for a single window, longer for several for a typical job. Outdoor work around Black Crofts depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Work indoors is not affected.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
- Try not to wet indoor joints just before the visit
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you are ready, send an email to info@mrmastic.co.uk.