Angus · Scotland
Sand mastic for sash & case windows in Forfar, Angus
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Forfar. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic that needs renewing before redecorating
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
Sand mastic in Forfar, done properly
A silicone bead around a sash window can look out of place and isn’t always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Typical jobs include mastic round period door frames that has failed and gaps between timber frames and stone or brick, on timber door frames, brick reveals and sash and case windows.
Harled walls are common in Scottish towns like Forfar, and sealing a frame against rough harling takes a sealant that grips and moves. A thin bead that hasn’t been worked into the surface soon lets water behind it.
Our work is backed for twelve months, in Forfar and everywhere else we cover.
- Where
- Forfar (DD8)
- Region
- Angus
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Common problems we fix in Forfar
Most of it is simply age. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
Any of these means the joints need attention:
- Cement or filler used on old window joints that has cracked
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
- Open joints round the window box
For an older house near a landmark such as Forfar Parish Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- Whether the sealant suits the joint
- Are they insured?
- How long the guarantee is
- How much experience the applicator has
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Decayed frames that need repair
- Broken panes
- Decisions on consent for listed homes
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think before you book.
Surfaces we seal
- Stone surrounds
- Brick reveals
- Sash and case windows
- Timber door frames
- Period & listed homes
- Tenement windows
Why deal with it now?
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. For landlords in Forfar, damp and leaks can fall under the Repairing Standard. Replacing failed sealant early is simpler than dealing with a complaint.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why us?
- Quality sealants from Arbo and Everbuild
- An ARBOMaster approved applicator
- We’re fully insured
- Domestic, commercial and hotel work
Read what affects the cost and customer reviews.
FAQs for Forfar
What guarantee comes with sand mastic in Forfar?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
How do I get a quote for sand mastic in Forfar?
The easiest way is to send an email to info@mrmastic.co.uk with a few details of the job. We will give you a clear price, with a fixed price before any work starts.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Are you insured?
Yes. Full insurance covers our work.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will advise.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours, and we will agree it with you first.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
What happens on the day
Before we leave, we go over the finished joints with you. The work normally takes a few hours per window, depending on the condition of the joints, depending on the amount of work. Parking around Forfar is rarely difficult, though older streets in the centre can be tight. If you are in a flat with a shared stair or a door entry system, let us know when you book.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
Getting a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll explain what’s involved.
Advice
Should I try it myself first?
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 fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Surface by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
Frames and glazing around Forfar
With historic houses such as Glamis Castle (about 4.7 miles west) nearby, there’s older building stock in the area around Forfar as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional 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.
For site and facilities teams at buildings such as Forfar Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Forfar is about 12 miles north of Dundee, in Angus. Jobs in Forfar get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. 40 places in Angus are on our list, from the larger towns to small villages. There’s also a page for Dundee, about 12 miles away.
Postcode districts we cover here for sand mastic: DD8. Whether your property is on West High Street, East High Street and Market Place or anywhere close by, we can help. Main roads around Forfar include the A94 and A926. We also cover the places around Forfar: Lunanhead (1 mile north-east), Kingsmuir (2 miles south-east), Padanaram (2 miles west), Lownie Moor (2 miles south-east) and Hillend (2 miles south-east). Within a short drive, we also cover Arbroath (13 miles south-east), Carnoustie (12 miles south-east), Kirriemuir (5 miles north-west), Brechin (11 miles north-east), Hunter's Town (12 miles south-east) and Gardynebourg (12 miles south-east). As one of the bigger places in Angus, Forfar has every kind of property, from flats to offices.
Local landmarks in Forfar
In Forfar, that means homes and buildings near 23 Osnaburg Street pub and Guthrie Park. A little further out are Forfar Castle (under half a mile north-west) and Meffan Museum and Art Gallery (less than half a mile south-west). Not far away are Loch of Forfar.
Places near Forfar
What else we do in Forfar
What affects the quote in Forfar
The price is agreed before any work begins. It takes into account:
- The old material and how stubborn it is
- Working hours on commercial sites
- Which sealant suits the joint
- Access and height
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- A few photos by email, if you can
- If someone has resealed it before
- Where the job is, and your postcode
- The problem you’ve noticed
To get a quote, drop us a line at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.