Dundee · Scotland
Sand mastic for sash & case windows in Downfield, Dundee
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Downfield, backed by a one-year guarantee. Ask us for a quote.
- Mastic dropping out of the joint
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
Sand mastic for homes and businesses in Downfield
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you have weathered mastic on the most exposed windows and gaps where the frame meets the masonry, we can put it right, whatever the surface.
Sash and case windows are a feature of older tenements in all four Scottish cities, though many have since been replaced. In Downfield, as anywhere, the mastic between frame and wall is what stops draughts and rain getting in.
Your job is guaranteed for a year, as with all our work.
- Location
- Downfield (DD3, DD2)
- Wider area
- Dundee
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What sealant work can’t fix
In fairness, some problems need a different trade:
- Putty and glazing repairs
- Sashes that rattle, stick or won’t open
- Decisions on consent for listed homes
Not sure which it is? You can send an email to info@mrmastic.co.uk and we will tell you honestly before booking.
Where we work in Downfield
- Stone surrounds
- Timber door frames
- Period & listed homes
- Sash and case windows
- Tenement windows
- Brick reveals
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What happens on the day
The work is kept neat and contained to the area we’re working on. Expect the work to take a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. In a Scottish city, a lot of jobs are in tenement flats, up a common stair from a shared close. In Downfield, it helps to know the floor, the door entry arrangements and the nearest parking.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
Get a quote
For a quote, send an email to info@mrmastic.co.uk with the location and a short description of the problem. We will give you a clear quote before any work starts.
Related advice
Leave it or put it right?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Private landlords in Downfield must meet the Repairing Standard, and damp or leaks can fall short of it, so it’s worth fixing failed sealant before a tenant reports it.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why us?
- Arbo and Everbuild products
- 4.9 on Google from 180+ five-star reviews
- We never seal over old sealant
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced or what customers say.
How the job changes by surface
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Downfield: your questions answered
How is work on the outside of a tenement in Downfield generally arranged?
Most tenements arrange shared repairs through the owners or a property factor. The Tenements (Scotland) Act 2004 covers the common parts where the deeds don’t, and we can quote for the factor or the owners directly.
Does living near the coast affect sand mastic in Downfield?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you come to Downfield?
We do. Downfield is part of the area we cover.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Is consent needed for window work on a listed home?
Check with your local planning authority. They decide whether consent is needed for work to your windows.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Are you fully insured?
Yes. We’re fully insured for domestic and commercial work.
What sand mastic looks like in Downfield
Downfield is within about 3 miles 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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Schools such as Lawside Academy are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Dundee station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Downfield is about 1 mile north-west of Dundee, in Dundee. We provide sand mastic to homeowners, landlords and businesses in Downfield and the surrounding area. 50 places in Dundee are on our list.
Postcode districts we cover here for sand mastic: DD3 and DD2. We cover properties on Cloan Road, Bruce Road and Clive Road and the roads around them. If you’re just outside Downfield, we cover Balgowan (1 mile north), Dundee (1 mile south-east), Woodside (1 mile south-east), Claverhouse (1 mile east) and Mill of Mains (1 mile east). Within a short drive, we also cover Broughty Ferry (5 miles east), Monifieth (6 miles east), Barnhill (5 miles east), Whitfield (3 miles east), Douglas (3 miles east) and Craigiebank (3 miles south-east). Downfield is among the bigger towns we cover in Dundee.
Near you in Downfield
We work in homes and buildings around Dudhope Park, Scottish School of Contemporary Dance and Cox Branch Library. For rail, the closest station is Dundee station, roughly 2.3 miles south. Nearby you will also find King's Cross Hospital (0.9 miles south) and Mains Castle (1.4 miles east). For a walk, there’s Trottick Mill Ponds and Balgay Hill.
Signs you need sand mastic in Downfield
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
If you can see any of these, it’s time to have the joints looked at:
- Modern sealant on a period surround
- Open joints round the window box
- Gaps round a timber door in stone or brick
- Mastic worn away on windows facing the weather
Camperdown House, about 1.9 miles west, is one of the historic houses in the wider area around Downfield, and older homes nearby need a sealant that suits their walls.
What your quote should include
- Who does the work, and how experienced they are
- How hidden problems are handled
- How the surfaces are prepared before sealing
- Whether you can choose the colour