Highland · Scotland
Glen Moriston Window Mastic
Window mastic in Glen Moriston from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Old mastic that has gone black or come away
- Whistling draughts around closed windows
- Mastic that has split away from the wall
Window mastic in Glen Moriston
Around Glen Moriston we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on uPVC windows, aluminium frames and composite doors, and common reasons people get in touch are rain getting in at the frame or under the sill and mastic that’s falling out in pieces.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
Big or small, you get the same one-year guarantee in Glen Moriston and across Highland.
- Location
- Glen Moriston (IV63)
- Region
- Highland
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Different surfaces, different methods
Composite doors
An exposed front door gets wind-driven rain, and the top and bottom corners tend to fail first. Those corners get the most care.
Aluminium frames
Aluminium needs a sealant that bonds to coated metal and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
Your questions about window mastic in Glen Moriston
Is Glen Moriston within the area you cover?
Yes. Glen Moriston is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Is there a guarantee on window mastic in Glen Moriston?
All our work, in Glen Moriston and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Where are you based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can you reach windows above the ground floor?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
Can I add another job to the visit?
Yes. Just list everything you need and you will get one quote.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Can new window sealant be painted?
Not if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Windows and doors in Glen Moriston
Glen Moriston is in the west of Scotland, which is wetter than the east, which means the mastic around window and door frames has to cope with a lot of rain. 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.
For jobs in and around Glen Moriston, choosing the right material for each joint is as important as a tidy finish.
Glen Moriston is about 30 miles south-west of Inverness, in Highland. For window mastic in and around Glen Moriston, please drop us a line at info@mrmastic.co.uk for a quick quote. We cover Highland from our Crawley base, Glen Moriston included. Our Highland coverage runs to 253 places, and Glen Moriston is one of them.
Work in IV63 is quoted and booked the same way as anywhere else. If you are just outside Glen Moriston, we cover Fort Augustus (5 miles south-east), Newtown (6 miles south-east), Aberchalder (6 miles south-east), Invermoriston (7 miles north-east) and Laggan (10 miles south). Remote and island addresses need a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
Landmarks near Glen Moriston
Green spaces nearby include Clach-bheinn and Loch nan Gobhar.
Places near Glen Moriston
Other services in Glen Moriston
What happens if it’s left?
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
What it costs depends on how much there is to do, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why us?
- Old sealant always removed completely
- We leave the area clean and tidy
- 180+ five-star Google reviews
- Domestic, commercial and hotel work
See what affects the cost and what customers say.
What affects the quote in Glen Moriston
Some jobs are bigger than they look, and some smaller. The main factors:
- How many areas need sealing
- The number and length of the joints
- Working hours on commercial sites
- The old material and how stubborn it is
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
Asking for a quote
When you call or email, it’s useful to know:
- Access, such as stairs, a lift or height
- The rough size of the job
- Any previous sealing or DIY work
- Where the job is, and your postcode
Need a quote? Please drop us a line at info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and send you a clear quote before we start.
What happens on the day
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and tidy away. It normally takes anything from an hour or two to a full day, depending on how many frames there are. Outside jobs in Glen Moriston need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job, and photos are welcome.
Related advice
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
When to call us in Glen Moriston
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that cannot keep up eventually tears.
These are the problems we are asked about most:
- Black, perished sealant on frames
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Hard, cracked sealant around windows
In and around Glen Moriston, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- Whether you can choose the colour
- How long to leave it before use
- Is the old sealant removed completely?
- What happens if the job turns out different