Scottish Borders · Scotland
Reston Sand Mastic
Sand mastic across Reston and nearby, with old sealant always removed completely and a one-year guarantee.
- Cement or filler used on old window joints that has cracked
- Cracked mastic round a front door frame
- Mastic that needs renewing before redecorating
Common problems we fix in Reston
Some old mastic was never deep enough. A thin layer does not hold well so we make sure the new mastic is the right thickness.
Common reasons people contact us include:
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
- Open joints round the window box
- Wind and rain getting in round a sash window
Rented homes near Reston station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Before booking anyone
- How hidden problems are handled
- Whether you can choose the colour
- What the cure time is
- Who turns up on the day
Sand mastic for homes and businesses in Reston
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. If you have gaps between timber frames and stone or brick and modern sealant on a period surround, we can help.
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.
The work is covered for a year after we finish. If there’s a problem with it, please drop us a line at info@mrmastic.co.uk.
- Place
- Reston (TD14)
- Region
- Scottish Borders
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What sealant work can’t fix
Before booking, it’s worth knowing the limits too:
- Masonry that needs repairing
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think.
Where we work in Reston
- Stone surrounds
- Period & listed homes
- Brick reveals
- Sash and case windows
- Tenement windows
- Timber door frames
How the job changes by surface
Stone surrounds
The stone is treated with care when the old mastic comes out.
Timber door frames
Round a period front door, sand mastic gives the right look.
Common questions in Reston
Can you help a landlord with a rental near Reston station?
Yes, landlords and agents are among the people we work for. Just email us at info@mrmastic.co.uk with the address and what needs doing, and we’ll send you a clear quote.
Is Reston within the area you cover?
Yes. Reston is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
Is consent needed for window work on a listed home?
Speak to your local planning authority before work starts. Like-for-like sand mastic is often the preferred finish but the decision is theirs.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Is sand mastic better than silicone for my windows?
We will talk it through with you. Sand mastic suits many period homes, and modern sealants suit newer frames.
Reston homes and the weather
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
For an older house near a landmark such as Reston Church Of Scotland, the joint between an old wall and a newer frame is normally the first place rain gets in.
Reston is in the Scottish Borders. If you need sand mastic in Reston, it’s easy to get a quote: please email us at info@mrmastic.co.uk. We cover the Scottish Borders from our Crawley base, Reston included. Reston is one of 89 towns and villages in the Scottish Borders where we work for sand mastic. Our Edinburgh page covers work nearby.
We work across TD14 for sand mastic. Local streets include Main Street, Ladeside and Newmains Farm Road. If you are just outside Reston, we cover Ayton (3 miles east), Coldingham (3 miles north-east), Scottish Borders (3 miles north-east), Chirnside (4 miles south) and St Abbs (4 miles north-east).
What’s near Reston
There’s a railway station in Reston itself: Reston station. A little further out are Ferney Castle (1.2 miles south). Green spaces nearby include Ayton Hill and Coldingham Loch.
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What affects the quote in Reston
We do not publish a price list. What we look at:
- Mould in or behind the old joints
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- The product the joint needs
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Roughly how big the job is
- Any previous sealing or DIY work
- The address or postcode of the job
- Any access issues, like height or stairs
There’s no standard price list. Instead, your job gets its own clear quote. To get started, send an email to info@mrmastic.co.uk.
Leave it or put it right?
New sash windows are a major, costly change and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around Reston, water from a failed joint in an older stone home can soak into timber and plaster.
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why book with us
- Experience in homes, commercial sites and hotels
- Neat joints and a tidy finish
- An ARBOMaster approved applicator
- 4.9 on Google from 180+ five-star reviews
Read what affects the cost or our reviews.
Also near Reston
What else we do in Reston
What we do, step by step
We keep the work tidy and contained to the joints we’re treating. Expect the work to take a few hours for a single window, longer for several, and we tell you how long to leave it before we go. For a place like Reston, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
Ask for a quote
For a quote, drop us a line at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.