Fife · Scotland
Window & door mastic in Dundonald, Fife
Window mastic in Dundonald from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old mastic that has gone black or come away
- Rain getting in at the frame or under the sill
- Draughty joints inside around the window
Window mastic in Dundonald, done properly
Most frames have an outside joint and an inside one. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. Common call-outs are for white mastic on grey or black frames and draughty joints inside around the window, on uPVC windows, patio & French doors and timber windows & doors.
Mastic can only go onto a dry joint, so outside work in Dundonald depends on the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
All of our work is guaranteed for twelve months.
- Location
- Dundonald (KY5)
- Region
- Fife
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we do, step by step
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. The job generally takes a few hours for a handful of frames, longer for a whole house. Outside jobs in Dundonald 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 each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
How to prepare
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
Ask for a quote
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job, and we will come back to you with a quote.
Related advice
Windows and doors in Dundonald
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. 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.
Rented homes near Cardenden station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Dundonald is about 4 miles west of Kirkcaldy, in Fife. For window mastic in and around Dundonald, it’s easy to get a quote: please email us at info@mrmastic.co.uk. We’re based in Crawley and cover Fife, Dundonald included. Across Fife, we cover 133 places, Dundonald among them. We also work in Edinburgh, about 14 miles from Dundonald.
Every address in KY5 is within our area for window mastic, from the main roads to the quietest streets. You’ll find streets such as Dundonald Park, Main Road and Denfield Drive, all of which we cover. We also cover Cardenden (1 mile north-east), Bowhill (1 mile north), Auchterderran (1 mile north-west), Cluny (2 miles north-east) and Auchtertool (2 miles south). Larger places within reach include Dunfermline (8 miles south-west), Kirkcaldy (4 miles east), Glenrothes (5 miles north-east), Leven (11 miles north-east), Cowdenbeath (4 miles south-west) and Dysart (5 miles east).
Landmarks near Dundonald
There’s a railway station in Dundonald itself: Cardenden station. A little further out are Whyteman's Brae Hospital (4 miles east) and Hallyards Palace (2.1 miles south). The countryside around Dundonald includes Loch Gelly and Benarty Hill.
What the job involves on each surface
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain cannot run into the wall.
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. If we find rot, we’ll tell you before going ahead, as that’s a job for a joiner.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Penetrating damp from a failed cavity tray or render
- A frame that has rotted at the joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think.
Joints and surfaces we work on
- Patio & French doors
- Aluminium frames
- Window sills
- Composite doors
- uPVC windows
- Timber windows & doors
Towns and villages near Dundonald
What else we do in Dundonald
What affects the quote in Dundonald
Jobs vary more than people expect. The main factors:
- The size of the job
- Mould in or behind the old joints
- Any working-time requirements on site
- How easy the joints are to reach
What it costs depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
Helping us quote
When you call or email, it’s useful to know:
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
Want a quote for window mastic? Please drop us a line at info@mrmastic.co.uk with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Your questions about window mastic in Dundonald
Is Dundonald in your area for window mastic?
Yes. We work across all of Scotland, and Dundonald is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job, and we will give you a clear quote.
I let a flat near Cardenden station. Can you help?
Yes, we work for landlords and agents. You can send an email to info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before any work starts.
Will new mastic stop draughts?
Yes, if the air is getting in around the frame. If it’s coming through the window seals, we’ll tell you.
What does window mastic cost?
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.
Can you get sealant to suit coloured frames?
Yes, in most cases. Tell us the frame colour when you get in touch and we’ll match it as closely as we can.
Can I paint over the new sealant?
Not if it’s silicone. Tell us your decorating plans and we’ll pick a sealant to suit.
Where is Mr Mastic based?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. Then drop us a line at info@mrmastic.co.uk.
What we are called out for in Dundonald
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, and it lets go sooner than it should.
Keep an eye out for these signs:
- Old mastic that has gone black or come away
- White mastic on grey or black frames
- Whistling draughts around closed windows
- Mastic that has split away from the wall
Schools such as Lochgelly High School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- What guarantee comes with the work
- Which sealant they’ll use, and why
- How much experience the applicator has
- How the joint is cleaned and prepared
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Wash the frames with mild soapy water
- Do not use solvent cleaners on the joint
- Paint up to the joint, not over it
- Air rooms to keep condensation down around windows
Try not to touch the new joint while it cures, following the cure time we give you. Do not point a pressure washer at the joints.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.