Perth and Kinross · Scotland
Window & door mastic in Perth, Perth and Kinross
Our applicators work in Perth on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Untidy mastic left by window fitters
- Draughty joints inside around the window
- A bead that does not match the frame
Window mastic in Perth
The new joint doesn’t have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. We’re often asked to deal with leaking joints at the ends of sills and mastic that has split away from the wall, on timber windows & doors, composite doors and uPVC windows.
Wind and rain in a Scottish town like Perth find any gap around a frame. The windows facing the weather are generally the first to leak.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Perth (PH1, PH2)
- Region
- Perth and Kinross
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Perth questions
Can you do window mastic in Perth?
Yes. Our work covers the whole of Scotland, and Perth is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
I let a flat near Perth station. Can you help?
Yes, landlords and agents are among the people we work for. You can send an email to info@mrmastic.co.uk with the details for a clear quote.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will tell you what we are using and why.
Where do you work from?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do the sealants smell?
Possibly a little. It fades as the sealant cures.
Do you guarantee window mastic?
Yes. Our one-year guarantee covers every job, inside or out.
What we are called out for in Perth
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. That is what backing rod is for.
It’s worth asking for a quote if you see:
- Cracked internal joints between frame and plaster
- Whistling draughts around closed windows
- Hard, cracked sealant around windows
- Black, perished sealant on frames
For site and facilities teams at buildings such as Perth High School, the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- Are they insured?
- How the colour is chosen
- What guarantee comes with the work
- What happens if they find a problem under the old sealant
What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours for a few frames, or a day or more for a whole house. A visit in Perth needs three things planned: access, parking and where the work is. Outdoor jobs need a dry day, so they can move if the weather turns.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
Ask for a quote
Want a quote for window mastic? Please send an email to info@mrmastic.co.uk with a few details. We will explain what we’d do and give you a clear price before we start.
Read more
Honest limits
We won’t take on work that will not last, so these are the limits:
- A door that needs adjusting, rehanging or new seals
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly before you book.
Surfaces we seal
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Composite doors
- Window sills
- Patio & French doors
For landlords and businesses
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Towns and villages near Perth
Also in Perth
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Windows and doors in Perth
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 failed outside joints work against that.
Rented homes near Perth station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Perth is about 33 miles north of Edinburgh, in Perth and Kinross. Whether you are in the middle of Perth or further out, window mastic is available for homes and businesses alike. 107 places in Perth and Kinross are on our list, from the larger towns to small villages. You can also see our page for Dundee, roughly 19 miles from Perth.
All of PH1 and PH2 is covered for window mastic. That includes homes and businesses on Simpson Square, High Street and Moredun Square. Perth is on the A9 and A85, so it’s easy for us to get to with everything needed for window mastic. Other places close to Perth include Oakbank (1 mile south-west), Scoonieburn (2 miles south-east), Tarsappie (2 miles south-east), Milltown of Aberdalgie (3 miles south-west) and Forgandenny (4 miles south). Larger places within reach include Blairgowrie and Rattray (14 miles north), Crieff (15 miles west), Auchterarder (12 miles south-west), Kinross (13 miles south), Coupar Angus (12 miles north-east) and Rattray (14 miles north). As one of the bigger places in Perth and Kinross, Perth has homes, rented property and businesses of every kind.
Local landmarks in Perth
We work in homes and buildings around North Inch, Public House and St John's Academy. The closest station to Perth is Perth station, roughly 0.7 miles south-east. A little further out are Murray Royal Hospital (1.2 miles east) and Balhousie Castle (0.6 miles north-east). Green spaces nearby include St Magdalene's Hill.
How to look after the new joints
To keep the joints looking good and working properly:
- Look round the frames every year or so
- Avoid harsh chemicals near the mastic
- Clean frames with a soft cloth and soapy water
- Keep paint and stain on wooden frames in good order
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
Why deal with it now?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. For landlords in Perth, damp and leaks can fall under the Repairing Standard. Replacing failed sealant early is simpler than dealing with a complaint.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why Perth clients choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- Rated 4.9 stars on Google
- We’re fully insured
- Tidy, careful work
Take a look at what affects the cost or our reviews.