Perth and Kinross · Scotland
Crook of Devon Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Crook of Devon and across Perth and Kinross. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Mastic that is falling out in pieces
- White mastic on grey or black frames
- Gaps between the frame and the inside reveal
Keeping the joints in good condition
Looking after new joints is easy:
- Keep drainage slots and sill grooves clear
- Paint up to the joint, not over it
- Ventilate rooms so frames don’t stay wet inside
- Use gentle cleaners on frames and sealant
Try not to touch the new joint while it cures, for as long as we advise. Don’t point a pressure washer at the joints.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. A new joint closes it up.
Window mastic for homes and businesses in Crook of Devon
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that can’t flex, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We’re often asked to deal with gaps left after new windows were fitted and leaking joints at the ends of sills, across composite doors, uPVC windows and timber windows & doors.
Mastic can only go onto a dry joint, so outside work in Crook of Devon depends on the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
Our work is backed for twelve months, in Crook of Devon and everywhere else we cover.
- Where
- Crook of Devon (KY13)
- Region
- Perth and Kinross
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
The process
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. Expect the work to take a few hours for a few frames, or a day or more for a whole house, and we explain the cure time before we leave. Somewhere like Crook of Devon may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
How to prepare
- Mention if the joints have been sealed before
- Clear the area around the work
- Keep pets and children clear of the area while we work
How to get a quote
Want a quote for window mastic? Please drop us a line at info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and give you a clear price before we start.
Related advice
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
What happens if it’s left?
If you’re painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
Why book with us
- More than 20 years in sealant work
- You choose the colour before work begins
- A 12-month guarantee on all work
- A sealant colour to suit the surroundings
What affects the quote in Crook of Devon
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- The number of rooms or windows
- Mould in or behind the old joints
- Any working-time requirements on site
- The amount of work
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- What’s wrong with the joints now
- The type of property
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, email us at info@mrmastic.co.uk.
Places near Crook of Devon
More services for Crook of Devon
Surface by surface
uPVC windows
We clean the frame edge carefully so the plastic isn’t marked, then the new bead is laid against the frame and the wall.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
Landlords, agents and businesses in Crook of Devon
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
What window mastic looks like in Crook of Devon
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
In and around Crook of Devon, as anywhere, good window mastic starts with a clean, dry, properly prepared joint. If you live in an older home near St Serf's Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Crook of Devon is about 9 miles north-west of Dunfermline, in Perth and Kinross. Homes, rented property, offices and hotels in Crook of Devon can book us for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. 107 places in Perth and Kinross are on our list, from the larger towns to small villages. For nearby work, see our Edinburgh page, about 21 miles away.
We work across KY13 for window mastic and the streets around it. Whether your property is on Church Road, St Serf's Road and Waulkmill or a nearby road, we can help. If you’re just outside Crook of Devon, we cover Rumbling Bridge (1 mile west), Powmill (1 mile south-west), Pool of Muckhart (2 miles west), Carnbo (2 miles north-east) and Blairingone (4 miles south-west). We also work in nearby towns such as Perth (15 miles north), Auchterarder (10 miles north-west), Kinross (5 miles east), Letham (15 miles north), Oakbank (15 miles north) and Hillyland (15 miles north).
Local landmarks in Crook of Devon
A little further out are Cleish Castle (3.4 miles east). Not far away are Innerdouny Hill and Loch Glow.
Your questions about window mastic in Crook of Devon
What guarantee comes with window mastic in Crook of Devon?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Is Crook of Devon in your area for window mastic?
Yes, Crook of Devon is within the area we cover. We work across all of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job, and we will give you a clear quote.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. Then drop us a line at info@mrmastic.co.uk.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Do you work for landlords and businesses?
Yes. As well as householders, we work for landlords, agents, businesses and hotels across Perth and Kinross.
How long will my window job take?
The work takes a morning for a couple of windows and a door. Access and how stubborn the old mastic is affect the time most.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.