Perth and Kinross · Scotland
Dunning Window Mastic
Mastic around window and door frames, sills and patio doors for Dunning, backed by a one-year guarantee. Call for a quick quote.
- Whistling draughts around closed windows
- Gaps left after new windows were fitted
- Cracked internal joints between frame and plaster
Window mastic in Dunning
Homes in Dunning have every kind of window: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on composite doors, uPVC windows and patio & French doors, and common reasons people get in touch are rain getting in at the frame or under the sill and old mastic that has gone black or come away.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Place
- Dunning (PH2)
- Region
- Perth and Kinross
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Surface by surface
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. We will point out any rot we find, as a joiner will need to deal with it.
Window sills
Stone and concrete sills have their own joints, and the joint under the frame can let rain run behind. We seal those with a sealant suited to masonry.
Towns and villages near Dunning
What else we do in Dunning
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The number of rooms or windows
- Any working-time requirements on site
- The old material and how stubborn it is
- The product the joint needs
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- What’s wrong with the joints now
- The address or postcode of the job
We do not publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, email us at info@mrmastic.co.uk.
Window mastic in Dunning: local notes
Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
If you live in an older home near St Serf's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Around Dunning, as everywhere, window mastic is only as good as the preparation behind it.
Dunning is about 8 miles south-west of Perth, in Perth and Kinross. Homes, rented property, offices and hotels in Dunning can book us for window mastic. Every job comes with our 12-month guarantee. Our area takes in 107 places across Perth and Kinross. There’s also a page for Dundee, about 26 miles away.
Our applicators cover all of the PH2 postcode area for window mastic. Whether your property is on Kirkstyle Square, Thorntree Square and Station Road or anywhere close by, we can help. We also cover the places around Dunning: Aberuthven (3 miles west), Auchterarder (5 miles west), Forgandenny (5 miles north-east), Milltown of Aberdalgie (5 miles north-east) and Balgowan (5 miles north). Further out, we also cover Perth (8 miles north-east), Crieff (11 miles north-west), Kinross (9 miles south-east), Letham (7 miles north-east), Scone (10 miles north-east) and Tulloch (8 miles north-east).
Landmarks near Dunning
Other landmarks nearby include St Margaret's Hospital (5.3 miles west) and Keltie Castle (1.1 miles south-west). Not far away are Dupplin Lake and Innerdouny Hill.
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Check the mastic once a year
- Clear any debris from frame drain holes
- Ventilate rooms so frames don’t stay wet inside
- Don’t paint over the silicone
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
The process
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take most of a day for a typical house, less for a few frames. Somewhere like Dunning may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- 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, and primed where the sealant calls for it.
- 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
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
For window mastic in Dunning, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and we will agree the price before any work begins.
Advice
Honest limits
A few problems are outside what sealant work can do:
- Faulty window hardware
- Rotten timber, which needs a joiner first
- Damp problems in the wall away from the window
If you’re not sure, just email us at info@mrmastic.co.uk and we will give you a straight answer.
What we seal
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Window sills
- Composite doors
- uPVC windows
For landlords and businesses
For anyone letting property in or around Dunning, several properties can be quoted together. Send us the addresses and the work at each.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
Dunning questions
Is Dunning in your area for window mastic?
Yes, Dunning is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing, and we will send you a clear quote.
Is there a guarantee on window mastic in Dunning?
Every job comes with our 12-month guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that usually means someone at home.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
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.
Do you have sealant for grey or black windows?
Yes. We can use white, brown, anthracite grey, black or clear, so the joint suits the frame.