Argyll and Bute · Scotland
Sand mastic for sash & case windows in Fionnphort, Argyll and Bute
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Fionnphort. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cement or filler used on old window joints that has cracked
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Sand mastic for homes and businesses in Fionnphort
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you have mastic that needs renewing before redecorating and cement or filler used on old window joints that has cracked, we can put it right.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Exposed frames and sills take the full force of wind-driven rain.
Whatever the size of the job, you get the same one-year guarantee.
- Where
- Fionnphort (PA66)
- Region
- Argyll and Bute
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. Most jobs take a few hours for a single window, longer for several. Outside jobs in Fionnphort 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.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- Clear items away from the joints we’re working on
Getting a quote
For a quote, drop us a line at info@mrmastic.co.uk with the location and a short description of the problem. We will send you a clear quote before any work starts.
Read more
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
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. Everything old must be removed first.
Fionnphort questions
Is Fionnphort within the area you cover?
Yes, we do. Our work covers the whole of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Does the coastal weather in Fionnphort affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Where do you work from?
We work from Crawley. Our applicators cover Fionnphort, along with the rest of our area.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Can you match the sealant colour?
We will suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Other services in Fionnphort
Different surfaces, different methods
Stone surrounds
The stone is treated with care while raking out the old mastic.
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Quotes for sand mastic in Fionnphort
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The size of the job
- When we can work, for business premises
- Which sealant suits the joint
- Whether the work is at height
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, send an email to info@mrmastic.co.uk.
Common problems we fix in Fionnphort
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Look out for any of the following:
- Mastic dropping out of the joint
- Mastic that needs renewing before redecorating
- Mastic round period door frames that has failed
- Failed mastic on an exposed elevation
In and around Fionnphort, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Before booking anyone
- How the colour is chosen
- Is VAT in the price?
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
Frames and glazing around Fionnphort
Fionnphort is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. 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 Fionnphort itself or nearby, the right material for each joint matters as much as a neat finish.
Fionnphort is in Argyll and Bute. Whether you are in the middle of Fionnphort or further out, sand mastic is available for homes and businesses alike. Fionnphort is one of 118 towns and villages in Argyll and Bute we cover for sand mastic.
Work in PA66 works the same way as everywhere else we cover. If you’re just outside Fionnphort, we cover Baile Mòr (1 mile north-west), Bunessan (5 miles east), Ardtun (5 miles east), Ballygown (15 miles north-east) and Upper Kilchattan (18 miles south). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
Local landmarks in Fionnphort
Well-known places in the area include Iona Heritage Centre (1.2 miles west). Green spaces nearby include Loch Poit na h-Ì and Càrn Buidhe.
Aftercare tips
After the cure time, these simple habits help:
- Avoid patching sand mastic with silicone
- Have rotten timber repaired before new mastic goes in
- Sort the mastic before the decorators arrive
- Find out about consent before window work on a listed home
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.