Stirling · Scotland
Window Mastic in Croftamie
Our applicators work in Croftamie on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Cracked internal joints between frame and plaster
- Untidy mastic left by window fitters
- Sealant in the wrong colour for the frame
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Wash the frames with mild soapy water
- Wipe condensation off the frames
- Keep paint off silicone joints
- Keep timber frames painted
Try not to touch the new joint while it cures, for as long as we advise. Do not point a pressure washer at the joints.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
Window mastic in Croftamie
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. We work on composite doors, patio & French doors and aluminium frames, and the jobs we see most are white mastic on grey or black frames and mastic that has split away from the wall.
In and around a place like Croftamie, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill, so the mastic there works hard.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Croftamie (G63)
- Wider area
- Stirling
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
If you are set on DIY, put the effort into 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.
What the job involves on each surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.
Window sills
Sills catch the water running down the glass, so the joints at each end and underneath matter. Each is cleaned out and resealed.
Do you need window mastic in Croftamie?
Sun, frost and rain wear sealant out. Sunlight dries the surface out, until it loses its stretch and starts to crack.
It’s worth asking for a quote if you see:
- Black, perished sealant on frames
- Gaps where the sill meets the wall
- Cracked or shrunken mastic around the frame
- White mastic on grey or black frames
For jobs in and around Croftamie, choosing the right material for each joint is as important as a tidy finish.
Before you book anyone
- How much experience the applicator has
- How the joint is cleaned and prepared
- How the colour is chosen
- What product goes in the joint
Questions from Croftamie
Is Croftamie within the area you cover?
Yes. Croftamie is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
Is window mastic in Croftamie guaranteed?
All our work, in Croftamie and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do you work for letting agents?
Yes, often. Several properties can be quoted together, and between tenancies is a good time for the work.
Are you insured?
Yes. We’re fully insured for every job we do.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you.
Will new mastic stop draughts?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that’s a different fix, and we’ll say so.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
What information do you need?
A short description and the location, plus photos if you have them. We will ask anything else we need to know.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
If you manage several properties in or around Croftamie, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Also near Croftamie
Other services in Croftamie
What we do, step by step
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a morning for a couple of windows and a door. Around Croftamie, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- 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.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us if parking is tricky
- Clear items away from the joints we are working on
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Just email us at info@mrmastic.co.uk with the details.
Read more
Frames and glazing around Croftamie
The west of Scotland is wetter than the east, so there’s plenty of rain for the mastic around window and door frames to keep out. 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.
Around Croftamie, as everywhere, window mastic is only as good as the preparation behind it.
Croftamie is about 8 miles north-east of Dumbarton, in Stirling. Homes, rented property, offices and hotels in Croftamie is covered for window mastic. The work is guaranteed for a year. Across Stirling, we cover 55 places, and Croftamie is one of them. For nearby work, see our Glasgow page (15 miles or so).
Work in G63 works the same way as everywhere else we cover. Local streets include McQueen Way, Buchanan Crescent and Cattermills. Close by, we work in Drymen (2 miles north), Killearn (3 miles east), Gartocharn (3 miles west), Milton of Buchanan (3 miles north-west) and Boquhan (4 miles east).
Near you in Croftamie
Other landmarks nearby include Duntreath Castle (4.8 miles south-east) and Killearn Hospital (2 miles east). Green spaces nearby include Loch Lomond National Nature Reserve and Dumgoyne.
When it is not the sealant
It helps to know what we cannot do too:
- Condensation trapped between the panes
- Faulty window hardware
- Draughts through the window seals rather than the frame
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think before booking.
What we seal
- Window sills
- uPVC windows
- Patio & French doors
- Composite doors
- Aluminium frames
- Timber windows & doors