Scottish Borders · Scotland
Sand mastic for sash & case windows in Longformacus, Scottish Borders
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Longformacus and across the Scottish Borders. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Silicone on a period window that looks wrong
- Failed mastic on an exposed elevation
- Mastic that needs renewing before redecorating
How we quote for sand mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- The number and length of the joints
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
When you call or email, these details help:
- Where the property is
- The problem you’ve noticed
- Any access issues, like height or stairs
- The rough size of the job
We quote each job on its own. Just email us at info@mrmastic.co.uk with the details.
Sand mastic in Longformacus, done properly
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we’ll explain which is best for yours. Typical jobs include old cement repairs round a window that have failed and cracked mastic round a front door frame, across stone surrounds, tenement windows and brick reveals.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Longformacus (TD11)
- Region
- Scottish Borders
- Cover
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Nearby places to Longformacus
Also in Longformacus
What the job involves on each surface
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
FAQs for Longformacus
Is Longformacus in your area for sand mastic?
Yes, Longformacus is within the area we cover. Our work covers the whole of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job.
Is there a guarantee on sand mastic in Longformacus?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
How long will you be here?
Most jobs take a few hours per window, depending on the condition of the joints. Your quote will say how long we expect yours to take.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can I add another job to the visit?
Yes, we can. More than one area can go on one quote.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we are using and why.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Why act early in Longformacus
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. Around Longformacus, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why book with us
- One-year guarantee on every job
- Tidy, careful work
- Trusted Arbo and Everbuild sealants
- Old sealant always removed completely
Take a look at our cost guide and what customers say.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Sashes that rattle, stick or will not open
- Broken panes
- Timber that has rotted
If you are not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer before you book.
Where we work in Longformacus
- Tenement windows
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Timber door frames
How the visit works
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours per window, depending on the condition of the joints. Outdoor work around Longformacus 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 look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
- Let us know if you’ve seen damp or leaks
Get a quote
Want a quote for sand mastic? Please send an email to info@mrmastic.co.uk and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Frames and glazing around Longformacus
Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
For an older house near a landmark such as Longformacus Parish Church, the joint between an old wall and a newer frame is normally the first place rain gets in. In and around Longformacus, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Longformacus is about 15 miles south-east of Haddington, in the Scottish Borders. We carry out sand mastic for homes and businesses in Longformacus and nearby. We cover 89 towns and villages across the Scottish Borders, large and small. Edinburgh is on our list too, around 29 miles away.
Postcode districts we cover here for sand mastic: TD11. We cover properties on The Row, Duns Road and Gifford Road and the roads around them. Close by, we work in Clockmill (5 miles south-east), Gavinton (6 miles south-east), Westruther (6 miles south-west), Preston (6 miles east) and Duns (6 miles east). Larger places within reach include Kelso (14 miles south), Earlston (14 miles south-west), Lauder (12 miles south-west) and Chirnside (11 miles east).
Around Longformacus
Other landmarks nearby include Langton Castle (4.5 miles south-east). Not far away are Twin Law.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Ask us before painting near the mastic
- Avoid patching sand mastic with silicone
- Plan mastic work ahead of painting
- Keep sills and gutters clear so water drains away
Leave the new mastic alone while it firms up. It forms a skin fairly soon, but takes longer to harden fully.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.