Na h-Eileanan Siar · Scotland
Sand mastic for sash & case windows in Lochmaddy, Na h-Eileanan Siar
Sand mastic for Lochmaddy, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked mastic round a front door frame
- Gaps where the frame meets the masonry
- Weathered mastic on the most exposed windows
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
About our sand mastic in Lochmaddy
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. Common call-outs are for gaps round a timber door in stone or brick and old sand mastic that has cracked, crumbled or fallen out, across tenement windows, period & listed homes and timber door frames.
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.
All our work is covered by a 12-month guarantee, wherever you are in Na h-Eileanan Siar.
- Where
- Lochmaddy (HS6)
- Region
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
The process
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for a single window, longer for several. Outdoor work around Lochmaddy depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- 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.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we’re working on
- Tell us if parking is tricky
Get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, send an email to info@mrmastic.co.uk.
Related advice
Landlords, agents and businesses in Lochmaddy
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Lochmaddy, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
What affects the quote in Lochmaddy
There’s no set price list, because no two jobs are the same. What we look at:
- Working hours on commercial sites
- The number of rooms or windows
- The amount of work
- The product the joint needs
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please email us at info@mrmastic.co.uk and we’ll talk you through it.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
Need a quote? Please email us at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Common problems we fix in Lochmaddy
Water gets into small cracks in the mastic and pushes it out. Exposed elevations normally fail first.
Most people get in touch after spotting something like this:
- Gaps round a timber door in stone or brick
- Weathered mastic on the most exposed windows
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
Whether the job is in Lochmaddy itself or nearby, the right material for each joint matters as much as a neat finish.
Questions to ask before booking
- Whether you can choose the colour
- How much experience the applicator has
- Whether all the old sealant comes out first
- How the joint is cleaned and prepared
Also near Lochmaddy
Other services in Lochmaddy
Leave it or put it right?
Filling over old, loose mastic does not last. Raking out and preparing the joint gives it a sound base so the new work lasts. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What you get with us
- Quality sealants from Arbo and Everbuild
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
- Approved under the ARBOMaster scheme
Take a look at our cost guide and our reviews.
Aftercare tips
Aftercare is simple:
- Make sure water runs off the sill
- Don’t run silicone over sand mastic
- Inspect the joints round the windows every year or so
- Go gently near the mastic when preparing windows
Leave the new mastic alone while it firms up. It skins over quickly, but takes longer to harden fully.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Lochmaddy: your questions answered
Does the coastal weather in Lochmaddy affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are generally the first to need attention.
Is Lochmaddy within the area you cover?
Yes, Lochmaddy is covered. We work across all of Scotland, islands included, and smaller places are part of that. Longer journeys are simply planned in advance.
Where do you work from?
Mr Mastic is based in Crawley. We cover Lochmaddy and the rest of Na h-Eileanan Siar.
Do you guarantee sand mastic work?
You get our 12-month guarantee to all our work.
Is it possible to take out silicone and use sand mastic instead?
Often, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will advise.
Is sand mastic better than silicone for my windows?
It depends on the window. Period windows in stone or brick generally suit sand mastic and newer frames generally get a flexible sealant.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Lochmaddy homes and the weather
Lochmaddy is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Island jobs need planning around ferries and the weather, so the more notice, the better.
In and around Lochmaddy, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Lochmaddy (Gaelic: Loch nam Madadh) is in Na h-Eileanan Siar. Every kind of property in Lochmaddy is covered for sand mastic. Every job comes with our one-year guarantee. Across Na h-Eileanan Siar, we cover 87 places, Lochmaddy among them.
Here we cover the HS6 postcode area for sand mastic. Other places close to Lochmaddy include Clachan Shannda (5 miles north-west), Locheport (6 miles south-west), Ruisgarry (8 miles north), Claddach Kirkibost (9 miles west) and Leverburgh (12 miles north-east). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Around Lochmaddy
A little further out are Taigh Chearsabhagh Museum and Arts Centre (0.6 miles south-east). The countryside around Lochmaddy includes Loch Fada and North Lee.