Angus · Scotland
Forfar Window Mastic
Problem with your window and door frames in Forfar? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Untidy mastic left by window fitters
- Cracked or shrunken mastic around the frame
- Cracked sealant at the sill ends
Window mastic in Forfar
Over two decades of sealing frames has taught us which products suit which walls. We’re ARBOMaster approved and fully insured, and we give a 12-month guarantee on the work. We’re often asked to deal with draughty joints inside around the window and mastic that has split away from the wall, on composite doors, patio & French doors and aluminium frames.
Wind and rain in a Scottish town like Forfar find any gap around a frame. Frames on the side that takes the weather generally fail first.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Forfar (DD8)
- Wider area
- Angus
- Cover
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Why deal with it now?
The work is quick compared with the damage it prevents: it takes anything from an hour or two to a full day, depending on how many frames there are. Leave it until water is coming in and you may need plastering and decorating as well. Scottish weather finds any gap, and in a town like Forfar, failed outside joints soon let damp into walls. Inside, a failed seal around a bath or shower lets water into floors and ceilings.
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’ll explain the quote if you ask.
What you get with us
- Rated 4.9 stars on Google
- Colour picked to suit the job
- Quality sealants from Arbo and Everbuild
- We are fully insured
Take a look at what affects the cost or our reviews.
Forfar homes and the weather
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
If you look after a building such as Forfar Academy, the mastic around its windows and doors needs looking after like any other building’s.
Forfar is about 12 miles north of Dundee, in Angus. Across the DD8 area, we cover window mastic for homes and businesses. Forfar is one of 40 places in Angus where we work. There’s also a page for Dundee, roughly 12 miles from Forfar.
Here we cover the DD8 postcode area for window mastic. Window mastic is available to properties on West High Street, East High Street and Market Place. You’ll find Forfar on the A94 and A926, which makes it straightforward to reach. Other places close to Forfar include 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). Larger places within reach include 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). Being one of Angus’s larger places, Forfar has homes, rented property and businesses of every kind.
Around Forfar
Typical jobs here are in homes near 23 Osnaburg Street pub and Guthrie Park and the streets around them. Well-known places in the area include Forfar Castle (within half a mile north-west) and Meffan Museum and Art Gallery (within half a mile south-west). The countryside around Forfar includes Loch of Forfar.
Your questions about window mastic in Forfar
Can you do window mastic in Forfar?
Yes. We work across all of Scotland, and Forfar is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we will give you a clear quote.
What’s the best way to get a price for window mastic in Forfar?
Just drop us a line at info@mrmastic.co.uk and let us know what needs doing and where. We will give you a clear quote, with a fixed price before work begins.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Does the work come with a guarantee?
Yes. All our work carries a 12-month guarantee, and we’re fully insured.
Do you have sealant for grey or black windows?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
How we quote for window mastic
The quote reflects the job in front of us. We look at:
- Any mould that needs treating
- Whether the work is at height
- How much there is to do
- How many rooms, windows or areas are involved
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Whether it’s a home or a business
- The rough size of the job
- A few photos by email, if you can
- Whether it has been sealed before
For a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
Signs you need window mastic in Forfar
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the brick or render around it hardly moves. If the sealant can’t stretch, it splits.
These are the problems we’re asked about most:
- Damp patches on the reveal after heavy rain
- Gaps where the sill meets the wall
- Old mastic that has gone black or come away
- Gaps between the frame and the inside reveal
For an older house near a landmark such as Forfar Parish Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
What your quote should include
- Whether the sealant suits the joint
- Whether VAT is included
- The length of the guarantee
- How the colour is chosen
Also near Forfar
What else we do in Forfar
When it isn’t the sealant
We’ll always be straight with you, so here’s what sealant can’t fix:
- A sash or casement that will not close properly
- Rotten timber, which needs a joiner first
- Condensation trapped between the panes
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think.
Surfaces we seal
- Patio & French doors
- Aluminium frames
- uPVC windows
- Composite doors
- Timber windows & doors
- Window sills
How it works
We work through the job in order: protect, prepare, seal, tidy. Typically it takes most of a day for a typical house, less for a few frames, and the area is left clean. For a job in Forfar, tell us where the work is, how to get in and where to park. Outside work depends on the weather, as sealant needs a dry surface.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- 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
- Mention if the joints have been sealed before
- Try not to wet indoor joints just before the visit
- Keep pets and children clear of the area while we work
Getting a quote
Want a quote for window mastic? Please drop us a line at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Read more
Landlords, agents and businesses in Forfar
For anyone letting property in or around Forfar, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.