Na h-Eileanan Siar · Scotland
Plasterfield Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Plasterfield, with a 12-month guarantee on every job. Call for a quick quote.
- Draughty sash windows at the surround
- Open joints round the window box
- Patchy fillers round a sash window
Sand mastic in Plasterfield
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Typical jobs include window mastic to renew ahead of painting and gaps round a timber door in stone or brick, across timber door frames, brick reveals and period & listed homes.
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.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- Plasterfield (HS1, HS2)
- Wider area
- Na h-Eileanan Siar
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Frames and glazing around Plasterfield
Plasterfield is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Work on the islands has to be planned around ferry crossings and the weather, so the more notice, the better.
For an older house near a landmark such as Stornoway High Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Plasterfield is about 1 mile east of Stornoway, in Na h-Eileanan Siar. From the centre of Plasterfield to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 87 places across Na h-Eileanan Siar, from the larger towns to small villages.
Work in HS1 and HS2 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on Simons Road, Anderson Road and Moss Park or anywhere close by, we can help. If you are just outside Plasterfield, we cover Sandwick (1 mile south), Steinis (1 mile north-east), Sanndabhaig (1 mile south-east), Stornoway (1 mile west) and Branahuie (1 mile east). As one of the bigger places in Na h-Eileanan Siar, Plasterfield has every kind of property, from flats to offices. Remote and island addresses need a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
What’s near Plasterfield
Nearby you will also find Western Isles Hospital (1.1 miles north-west) and Lewis Loom Centre (1.1 miles west). The countryside around Plasterfield includes Loch Àirigh na Lic.
Surface by surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
How to look after the new joints
To keep the joints looking good and working properly:
- Look over the window mastic once a year
- Plan mastic work ahead of painting
- Take care around the mastic when scraping paint
- Clear gutters so water does not pour onto the windows
Leave the new mastic unpainted, as traditional guidance advises. If you are redecorating, ask us first.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Common questions in Plasterfield
Is Plasterfield in your area for sand mastic?
Yes. We work across all of Scotland, and Plasterfield is part of that. You can email us at info@mrmastic.co.uk and let us know what needs doing.
Do you cover smaller places like Plasterfield?
Yes, smaller places are covered as well as towns. We work across all of Scotland, including the islands, where work is planned around ferry crossings. Let us know about access, parking and anything unusual about getting there when you book.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can you replace silicone on a period window with sand mastic?
In most cases. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Is it possible to paint over sand mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will talk you through it.
What affects the cost of sand mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any working-time requirements on site
- Any mould that needs treating
- Access and height
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- If someone has resealed it before
- Access, such as stairs, a lift or height
Want a quote for sand mastic? Please send an email to info@mrmastic.co.uk and tell us about the job. We will explain what we’d do and give you a clear quote before we start.
When to call us in Plasterfield
Shallow joints are a common cause. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Signs it’s time to call us include:
- Gaps between timber frames and stone or brick
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
In and around Plasterfield, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- Whether you can choose the colour
- How the surfaces are prepared before sealing
- What the cure time is
- What the quote includes, VAT included or not
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
When it is not the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Timber that has rotted
- Whether work needs listed building consent
- Crumbling stone or brickwork round the window
If in doubt, email us at info@mrmastic.co.uk and we will say what we think.
What we seal
- Sash and case windows
- Period & listed homes
- Tenement windows
- Timber door frames
- Stone surrounds
- Brick reveals
How the visit works
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a single window, longer for several. For a place like Plasterfield, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Every job is quoted individually, so start by telling us what you need. Just drop us a line at info@mrmastic.co.uk with the details.