Highland · Scotland
Window Mastic in Lewiston
Window and door frames in Lewiston need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Rain getting in at the frame or under the sill
- Sealant in the wrong colour for the frame
- Mastic that’s falling out in pieces
Window mastic in Lewiston, done properly
Over two decades of sealing frames has taught us which products suit which walls. We’re ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. If you are dealing with damp patches on the reveal after heavy rain and draughts coming in around windows and doors, we can put it right, on patio & French doors, aluminium frames and uPVC windows alike.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. 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 something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Lewiston (IV63)
- Wider area
- Highland
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Questions from Lewiston
Is Lewiston within the area you cover?
Yes, Lewiston is covered. We work across all of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Lewiston in your area for window mastic?
Yes. Our work covers the whole of Scotland, and Lewiston is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear quote.
Can I paint over the new sealant?
That depends on the product. Some hybrid sealants can be painted; silicone can’t. Tell us if you’re decorating and we’ll choose accordingly.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once, and between tenancies is a good time for the work.
How do I get a quote for window mastic in Lewiston?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
I’m a tenant. Can you help?
Of course. Check with your landlord; we can send the quote to them too.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint.
What window mastic looks like in Lewiston
Historic houses like Boleskine House (about 4.4 miles south) are a reminder that the area around Lewiston has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
Managing a site like Glen Urquhart High School? Then larger buildings have plenty of frames, and the mastic around each one ages. Homes close to Kilmore Parish Church of Scotland include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Lewiston is about 13 miles south-west of Inverness, in Highland. Every kind of property in Lewiston is covered for window mastic. Every job comes with our one-year guarantee. Lewiston is one of 253 towns and villages in Highland where we work for window mastic.
We cover every part of the IV63 postcode area for window mastic. That includes homes and businesses on Dal of Borlum, Carn Glas and Carriers Croft and the roads around them. If you are just outside Lewiston, we cover Drumnadrochit (1 mile north), Torness (4 miles east), Gorthleck (6 miles south), Dores (7 miles north-east) and Kiltarlity (8 miles north). Within a short drive, we also cover Inverness (13 miles north-east), Merkinch (14 miles north-east), Hilton (13 miles north-east), Crown (14 miles north-east), Millburn (14 miles north-east) and Muir of Ord (13 miles north). If you are somewhere remote, a little more planning is needed.
What’s near Lewiston
Around Lewiston, our work takes us to homes and buildings near Drumnadrochit Hotel. Other landmarks nearby include Urquhart Castle (1.3 miles east) and Urquhart Castle Visitor Centre (1.2 miles east). For a walk, there’s Loch Ness.
Also near Lewiston
Also in Lewiston
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Surface by surface
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. It comes out, deep gaps get backing rod and the joint is resealed.
Patio & French doors
Not every patio door leak is a mastic problem: blocked drain slots, worn brush seals and threshold details can let water in too. We check before we reseal.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
What happens if it’s left?
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. In an older home around Lewiston, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Lewiston
- 180+ five-star Google reviews
- Neat joints and a tidy finish
- Anti-fungal silicone where joints get wet
- Trusted Arbo and Everbuild sealants
Read our cost guide or what customers say.
How the visit works
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. The job usually takes a few hours for a few frames, or a day or more for a whole house. Outdoor work around Lewiston depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- 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.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
Getting a quote
We quote each job on its own, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job.
Advice
When it is not the sealant
We’ll always be straight with you, so here’s what new sealant will not do:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Soft or decayed wood in the frame
- A sash or casement that won’t close properly
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think before booking.
Where we work in Lewiston
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Window sills
- Patio & French doors
Quotes for window mastic in Lewiston
You will get a clear quote before any work starts. It takes into account:
- Whether there’s mould to deal with
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, drop us a line at info@mrmastic.co.uk and we will give you an honest view and a quote.
What we need to know
To make quoting easier, let us know:
- The address or postcode of the job
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- Whether it’s a home or a business
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we will take it from there.