Highland · Scotland
Sand mastic for sash & case windows in Newtown, Highland
Professional sand mastic in and around Newtown, with every bit of old sealant taken out first.
- Old sand mastic that has cracked, crumbled or fallen out
- Old cement repairs round a window that have failed
- Mastic worn away on windows facing the weather
Sand mastic in Newtown, done properly
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted, so ask us before you decorate. We work on brick reveals, stone surrounds and period & listed homes, and people most often call us about crumbling sand mastic round a window and modern sealant on a period surround.
In and around a place like Newtown, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
Big or small, it’s backed by our 12-month guarantee in Newtown and across Highland.
- Where
- Newtown (PH35)
- Wider area
- Highland
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What affects the cost of sand mastic
There’s no set price list. What we look at:
- Whether the work is at height
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- Whether there’s mould to deal with
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
Helping us quote
To make quoting easier, let us know:
- The address or postcode of the job
- How many joints, rooms or windows are involved
- Photos by email, if that’s easy
- What’s wrong with the joints now
Want a quote for sand mastic? Please send an email to info@mrmastic.co.uk and tell us about the job. We will explain what we’d do and send you a clear quote before work begins.
What we do, step by step
We bring everything the job needs with us. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. For a place like Newtown, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Clear the area around the work
- Mention any tricky access
- Tell us if parking is tricky
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
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Signs you need sand mastic in Newtown
Timber frames move with the seasons. That movement opens up the mastic joint over time.
Look out for these signs:
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Mastic worn away on windows facing the weather
- Draughty sash windows at the surround
Around Newtown, as everywhere, sand mastic is only as good as the preparation behind it.
What your quote should include
- What happens if the job turns out different
- Whether they’re fully insured
- What guarantee comes with the work
- Who does the work, and how experienced they are
How the job changes by surface
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Nearby places to Newtown
Other services in Newtown
Newtown: your questions answered
Is Newtown in your area for sand mastic?
Yes. Our work covers the whole of Scotland, and Newtown is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Is sand mastic in Newtown guaranteed?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
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.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme.
Is sand mastic better than silicone for my windows?
Sand mastic usually suits period timber windows best. On modern frames, we’d normally use a flexible sealant, and we’ll explain why.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Where are you based?
Mr Mastic is based in Crawley. We cover Newtown and the rest of Highland.
Sand mastic in Newtown: 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 failed outside joints work against that.
Whether the job is in Newtown itself or nearby, the right material for each joint matters as much as a neat finish.
Newtown is about 31 miles south-west of Inverness, in Highland. Every kind of property in Newtown is covered for sand mastic. Every job comes with our 12-month guarantee. Across Highland, we cover 253 places, and Newtown is one of them. For nearby work, see our Dundee page, about 79 miles away.
Jobs for sand mastic in PH35 works the same way as everywhere else we cover. We also cover the places around Newtown: Aberchalder (1 mile south-west), Fort Augustus (3 miles north-east), Glen Moriston (6 miles north-west), Laggan (6 miles south-west) and Invermoriston (9 miles north-east). For island and remote addresses, a little more planning is needed, so let us know when you get in touch.
Near you in Newtown
Other landmarks nearby include Invergarry Castle (3.5 miles south-west). For a walk, there’s Loch Uanagan.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Get any rot dealt with first
- Look over the window mastic once a year
- Clear gutters so water doesn’t pour onto the windows
- Plan mastic work ahead of painting
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
When it isn’t the sealant
To be straight with you, some problems need a different trade:
- Masonry that needs repairing
- Cracked or broken glass
- Decayed frames that need repair
If you are not sure, just drop us a line at info@mrmastic.co.uk and we will give you a straight answer.
Where we work in Newtown
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
- Sash and case windows