Scottish Borders · Scotland
Heriot Window Mastic
Professional window mastic in and around Heriot, with every bit of old sealant taken out first and a 12-month guarantee.
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Cracked internal joints between frame and plaster
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Window mastic for homes and businesses in Heriot
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. If you are dealing with old mastic that has gone black or come away and draughty joints inside around the window, we can put it right.
Outdoor sealant needs a dry surface, so window work around Heriot is planned around the weather. Let us know about access to every frame, including any upstairs.
Every job is covered by our 12-month guarantee.
- Where
- Heriot (EH38)
- Region
- Scottish Borders
- Cover
- One year on every job
- Quote
- A clear price before we start
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Landlord and commercial work in Heriot
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Quotes for window mastic in Heriot
Your quote is based on your job. We take into account:
- The number of rooms or windows
- The size of the job
- Mould in or behind the old joints
- Working hours on commercial sites
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Asking for a quote
To help us quote quickly, please include:
- The problem you’ve noticed
- If someone has resealed it before
- Whether it’s a home or a business
- Pictures of the joints, sent by email
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, email us at info@mrmastic.co.uk.
How to look after the new joints
Aftercare is simple:
- Keep jet washers away from the mastic
- Use gentle cleaners on frames and sealant
- Keep solvents and bleach off the sealant
- Air rooms to keep condensation down around windows
Silicone can’t generally be painted, so if you are planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
Nearby places to Heriot
What else we do in Heriot
FAQs for Heriot
What guarantee comes with window mastic in Heriot?
All our work, in Heriot and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Is Heriot within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
Will resealing my frames help with draughts?
Yes, where the draught is at the frame edge. We check where the draught is before work begins.
Can tenants book the work?
Yes. Ask your landlord first, and we can send them the quote if that helps.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once.
Frames and glazing around Heriot
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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Around Heriot, as everywhere, window mastic is only as good as the preparation behind it.
Heriot is about 9 miles south-east of Bonnyrigg, in the Scottish Borders. Heriot gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 89 towns and villages across the Scottish Borders, large and small. We also work in Edinburgh, around 15 miles away.
All of EH38 is within our area for window mastic. Local streets include Heriot Way and Shoestanes Road, all of which we cover. If you’re just outside Heriot, we cover Fountainhall (4 miles south-east), North Middleton (4 miles north-west), Arniston (5 miles north-west), Birkenside (5 miles north-west) and Gorebridge (6 miles north-west). Further out, we also cover Galashiels (13 miles south-east), Peebles (13 miles south-west), Innerleithen (12 miles south), Melrose (15 miles south-east), Earlston (15 miles south-east) and Lauder (9 miles south-east).
Landmarks near Heriot
Nearby you will also find Crichton Castle (4.3 miles north). Open spaces near Heriot include Dun Law.
What we are called out for in Heriot
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
The most common problems we see are:
- Gaps left after new windows were fitted
- A bead that doesn’t match the frame
- Cold air getting in at the frame edge
- Gaps between the frame and the inside reveal
Whether the job is in Heriot itself or nearby, the right material for each joint matters as much as a neat finish.
What to look for in a quote
- Is the old sealant removed completely?
- Whether they’re fully insured
- Is VAT in the price?
- What the cure time is
How the visit works
When we arrive, we look over the joints with you first. Surfaces next to the work are protected before any work starts. The work generally takes anything from an hour or two to a full day, depending on how many frames there are. Outside jobs in Heriot need a dry day, because sealant won’t bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors is not affected.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Keep children and pets away from the work area
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
Ask for a quote
We quote each job on its own. Just email us at info@mrmastic.co.uk with the details and send pictures if you have them.
Read more
Leave it or put it right?
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
A few things move the cost up or down: 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.
Why Heriot clients choose us
- More than 20 years in sealant work
- Domestic, commercial and hotel work
- Colour picked to suit the job
- Neat joints and a tidy finish
Read what affects the cost or what customers say.