Na h-Eileanan Siar · Scotland
Sand mastic for sash & case windows in Lochboisdale, Na h-Eileanan Siar
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Lochboisdale, with a one-year guarantee on every job. Call for a quick quote.
- Crumbling sand mastic round a window
- A silicone bead on a sash window that spoils the look
- Mastic round period door frames that has failed
Sand mastic for homes and businesses in Lochboisdale
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. We are often asked to deal with a silicone bead on a sash window that spoils the look and cement or filler used on old window joints that has cracked, on brick reveals, stone surrounds and sash and case windows.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
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.
- Location
- Lochboisdale (HS8)
- Region
- Na h-Eileanan Siar
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
How the visit works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours per window, depending on the condition of the joints. Somewhere like Lochboisdale may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- On commercial sites, let us know about site rules
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
Get a quote
For sand mastic in Lochboisdale, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
What sand mastic looks like in Lochboisdale
Lochboisdale 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. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
Around Lochboisdale, as everywhere, sand mastic is only as good as the preparation behind it.
Lochboisdale is in Na h-Eileanan Siar. Wherever you are in the HS8 postcode area, our applicators can take on sand mastic. Lochboisdale is one of 87 places in Na h-Eileanan Siar where we work for sand mastic.
Our applicators cover all of HS8 for sand mastic. Sand mastic is available to properties on Braehead, Calabhaigh and Kenneth Terrace. We also cover Loch Baghasdail (1 mile north), Dalabrog (2 miles north-west), Rubha Ban (5 miles south), Eòlaigearraidh (9 miles south-west) and Cuidhir (12 miles south-west). For island and remote addresses, the job takes a little more planning, so mention it when you ask for a quote.
Near you in Lochboisdale
Other landmarks nearby include Calvay Castle (1.8 miles east). The countryside around Lochboisdale includes Beinn Ruigh Choinnich and Loch Stulaval.
What we cannot put right
Sealant isn’t the answer to every problem, and we will tell you before we start. It won’t solve:
- Decayed frames that need repair
- Broken panes
- Planning or listed building consent (your local planning authority decides)
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before booking.
Joints and surfaces we work on
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
- Sash and case windows
Common problems we fix in Lochboisdale
Timber frames move with the seasons. That movement opens up the mastic joint little by little.
The problems people normally mention when they call include:
- Mastic that needs renewing before redecorating
- Draughts and rain around sash boxes
- Weathered mastic on the most exposed windows
- Gaps between timber frames and stone or brick
For jobs in and around Lochboisdale, choosing the right material for each joint is as important as a tidy finish.
Comparing quotes
- Is VAT in the price?
- When the joint can take water or movement
- The length of the guarantee
- Which colour the sealant will be
Why deal with it now?
New mastic over crumbling mastic will not hold. Raking out and preparing the joint gives it a sound base so the new mastic stays put. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why choose Mr Mastic in Lochboisdale
- 20+ years of sealant experience
- Approved under the ARBOMaster scheme
- One-year guarantee on every job
- Any old sealant cut out fully, not covered over
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Find out about consent before window work on a listed home
- Clear gutters so water doesn’t pour onto the windows
- Leave the new mastic unpainted
- Look over the window mastic once a year
Avoid painting over the new mastic, which is the traditional advice. If you’re redecorating, ask us first.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Places near Lochboisdale
Other services in Lochboisdale
What the job involves on each surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we will confirm access.
Questions from Lochboisdale
Is Lochboisdale in your area for sand mastic?
Yes, Lochboisdale is within the area we cover. We work across all of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job, and we will send you a clear quote.
Will you come out to Lochboisdale?
Yes, we do. Our work covers the whole of Scotland, islands included, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you replace silicone on a period window with sand mastic?
In most cases. We remove the silicone and clean the joint, then point it with sand mastic.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Is it OK to seal over old sealant?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Can I add another job to the visit?
Of course. Doing several areas at once is usually more efficient.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.