Na h-Eileanan Siar · Scotland
Sand mastic for sash & case windows in Na h-Eileanan an Iar, Na h-Eileanan Siar
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Na h-Eileanan an Iar, with a one-year guarantee on every job. Ask us for a quote.
- Gaps where the frame meets the masonry
- Mastic dropping out of the joint
- Old cement repairs round a window that have failed
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Avoid patching sand mastic with silicone
- Ask us before painting near the mastic
- Keep sills and gutters clear so water drains away
- Ask a joiner to look at soft timber first
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Sand mastic in Na h-Eileanan an Iar
We work across Na h-Eileanan an Iar renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. Common call-outs are for open joints round the window box and silicone on a period window that looks wrong, on tenement windows, stone surrounds and period & listed homes.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Place
- Na h-Eileanan an Iar (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
When it isn’t the sealant
We won’t take on work that won’t last, so these are the limits:
- Sash cords, weights and draught-proofing of the sashes
- Masonry that needs repairing
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think before booking.
Surfaces we seal
- Period & listed homes
- Brick reveals
- Sash and case windows
- Timber door frames
- Tenement windows
- Stone surrounds
Landlord and commercial work in Na h-Eileanan an Iar
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
What happens on the day
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours per window, depending on the condition of the joints. Somewhere like Na h-Eileanan an Iar may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- Let us know about stairs, lifts or work at height
Get a quote
Need a quote? Please email us at info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and give you a clear price before we start.
Related advice
Nearby places to Na h-Eileanan an Iar
What else we do in Na h-Eileanan an Iar
Na h-Eileanan an Iar homes and the weather
Na h-Eileanan an Iar 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. On the islands, wind and salt spray are hard on outside sealant.
For jobs in and around Na h-Eileanan an Iar, choosing the right material for each joint is as important as a tidy finish.
Na h-Eileanan an Iar is in Na h-Eileanan Siar. From the centre of Na h-Eileanan an Iar to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Across Na h-Eileanan Siar, we cover 87 places, Na h-Eileanan an Iar among them.
We cover every part of the HS2 postcode area for sand mastic and the streets around it. If you need sand mastic at a property on Rathad a' Chladaich and Rathad a Bhraigh or anywhere close by, our applicators can take on the job. We also cover the places around Na h-Eileanan an Iar: Aiginis (1 mile south-west), Knock (1 mile east), Lower Bayble (2 miles east), Garrabost (2 miles north-east) and Pabail Uarach (2 miles east). Remote and island addresses need a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Landmarks near Na h-Eileanan an Iar
A little further out are Western Isles Hospital (4 miles west).
Why act early in Na h-Eileanan an Iar
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Na h-Eileanan an Iar
- A 12-month guarantee on all work
- Anti-fungal sanitary silicone in wet areas
- We leave the area clean and tidy
- Rated 4.9 stars on Google
Na h-Eileanan an Iar: your questions answered
Do you cover smaller places like Na h-Eileanan an Iar?
Yes, we do. We work across all of Scotland, islands included, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Does living near the coast affect sand mastic in Na h-Eileanan an Iar?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Can you replace silicone on a period window with sand mastic?
Generally, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Do you work for landlords and businesses?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few photos.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Surface by surface
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we’ll confirm access.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Do you need sand mastic in Na h-Eileanan an Iar?
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
If you can see any of these, it’s time to have the joints looked at:
- A silicone bead on a sash window that spoils the look
- Tired mastic found when preparing windows for paint
- Gaps between timber frames and stone or brick
- Draughts and rain around sash boxes
Around Na h-Eileanan an Iar, as everywhere, sand mastic is only as good as the preparation behind it.
Comparing quotes
- What the quote includes, VAT included or not
- How much experience the applicator has
- How the joint is cleaned and prepared
- What insurance they hold