Scottish Borders · Scotland
Nether Blainslie Sand Mastic
Our applicators work in Nether Blainslie on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Patchy fillers round a sash window
- Mastic worn away on windows facing the weather
- Old sand mastic that has cracked, crumbled or fallen out
Sand mastic in Nether Blainslie, 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. Sand mastic is often favoured as a like-for-like material. Common call-outs are for old cement repairs round a window that have failed and cracked mastic round a front door frame, across tenement windows, sash and case windows and brick reveals.
In and around a place like Nether Blainslie, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill.
You get a 12-month guarantee, the same in Nether Blainslie as everywhere else we work.
- Where
- Nether Blainslie (TD1)
- Region
- Scottish Borders
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What happens if it’s left?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and blends with the stone or brick. In an older home around Nether Blainslie, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What you get with us
- We are fully insured
- We never seal over old sealant
- Anti-fungal sanitary silicone in wet areas
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost and what customers say.
What we do, step by step
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to a full day, depending on how many windows. In smaller Scottish places, parking is generally less of an issue than access and distance. Let us know how to find you and how to reach the joints.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
Getting a quote
Every job is quoted individually, so the first step is telling us about yours. Just send an email to info@mrmastic.co.uk with the details and send pictures if you have them.
Related advice
What we can’t put right
In fairness, there are a few things sealant won’t fix:
- Planning or listed building consent (your local planning authority decides)
- Rotten sashes, sills or window boxes (a joiner’s job)
- Crumbling stone or brickwork round the window
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think before you book.
Joints and surfaces we work on
- Stone surrounds
- Tenement windows
- Period & listed homes
- Sash and case windows
- Timber door frames
- Brick reveals
Windows and doors in Nether Blainslie
Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic. 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.
In and around Nether Blainslie, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Nether Blainslie is about 6 miles north-east of Galashiels, in the Scottish Borders. Anywhere in TD1, we can carry out sand mastic at your property. Nether Blainslie is one of 89 towns and villages in the Scottish Borders where we work. You can also see our page for Edinburgh, roughly 26 miles from Nether Blainslie.
All of TD1 is covered for sand mastic, from the main roads to the quietest streets. If you are just outside Nether Blainslie, we cover Lauder (3 miles north-west), Earlston (4 miles south-east), Gattonside (5 miles south), Stow (5 miles west) and Langlee (6 miles south-west). Within a short drive, we also cover Galashiels (6 miles south-west), Kelso (13 miles south-east), Selkirk (10 miles south-west), Innerleithen (14 miles west), Melrose (6 miles south) and St Boswells (8 miles south).
Landmarks near Nether Blainslie
Other landmarks nearby include Old Thirlestane Castle (2.6 miles north-east).
Common questions in Nether Blainslie
Is Nether Blainslie in your area for sand mastic?
Yes, Nether Blainslie is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
Do you cover smaller places like Nether Blainslie?
Yes, Nether Blainslie is covered. We work across all of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings. The product needed can limit the range.
Is it possible to paint over sand mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will advise.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will explain our choice.
What guarantee comes with the work?
Every job comes with our 12-month guarantee.
How do I get a quote for sand mastic in Nether Blainslie?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Signs you need sand mastic in Nether Blainslie
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Look out for these signs:
- Draughty sash windows at the surround
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
- Cracked mastic round a front door frame
For jobs in and around Nether Blainslie, choosing the right material for each joint is as important as a tidy finish.
Before you book anyone
- Is VAT in the price?
- Are they insured?
- How long the guarantee is
- How hidden problems are handled
Nearby places to Nether Blainslie
Also in Nether Blainslie
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Make sure water runs off the sill
- Look over the window mastic once a year
- Get any rot dealt with first
- Avoid heavy scraping on the mastic joint
Do not touch or press the mastic while it hardens. It forms a skin fairly soon, but takes longer to harden fully.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.