Na h-Eileanan Siar · Scotland
Sand mastic for sash & case windows in Shawbost, Na h-Eileanan Siar
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Shawbost and across Na h-Eileanan Siar. Fully insured, ARBOMaster approved and guaranteed for a year.
- Draughty sash windows at the surround
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
Sand mastic in Shawbost
Across Shawbost, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand, finished to suit the masonry. We are often asked to deal with gaps between timber frames and stone or brick and tired mastic found when preparing windows for paint, on brick reveals, stone surrounds and timber door frames.
Mastic can only go onto a dry joint, so outside work in Shawbost depends on the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
All our work comes with a 12-month guarantee.
- Location
- Shawbost (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
FAQs for Shawbost
Does the coastal weather in Shawbost affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Do you cover Shawbost for sand mastic?
Yes. We work across all of Scotland, and Shawbost is part of that. You can email us at info@mrmastic.co.uk and let us know what needs doing.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Can you do several jobs on one visit?
Yes. Just list everything you need.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Is sand mastic better than silicone for my windows?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant.
How much does sand mastic cost in Shawbost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Nearby places to Shawbost
More services for Shawbost
What we’re called out for in Shawbost
Timber frames move with the seasons. That movement opens up the mastic joint little by little.
These are the problems we’re asked about most:
- Silicone on a period window that looks wrong
- Tired mastic found when preparing windows for paint
- Mastic round period door frames that has failed
- Weathered mastic on the most exposed windows
Whether the job is in Shawbost itself or nearby, the right material for each joint matters as much as a neat finish.
Comparing quotes
- Is VAT in the price?
- How hidden problems are handled
- What product goes in the joint
- Whether all the old sealant comes out first
The process
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the work takes a few hours for a single window, longer for several for a typical job. Outdoor work around Shawbost depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Clear items away from the joints we’re working on
- Mention any tricky access
- Keep children and pets away from the work area
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Read more
When something else is needed
It helps to know what we can’t do:
- Cracked or broken glass
- Whether work needs listed building consent
- Sashes that need overhauling
If in doubt, email us at info@mrmastic.co.uk and we will say what we think before you book.
Surfaces we seal
- Timber door frames
- Stone surrounds
- Period & listed homes
- Tenement windows
- Brick reveals
- Sash and case windows
Shawbost homes and the weather
Shawbost is close to 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. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
Around Shawbost, as everywhere, sand mastic is only as good as the preparation behind it.
Shawbost (Gaelic: Siabost) is in Na h-Eileanan Siar. We carry out sand mastic for homes and businesses in Shawbost. Across Na h-Eileanan Siar, we cover 87 places, and Shawbost is one of them.
Work in HS2 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on Rathad Ghrinnibhat, Cnoc a Charnain and Sraid na H-Eaglaise or a nearby road, we can help. Close by, we work in Bragar (2 miles north-east), Na Gearrannan (4 miles south-west), Carloway (4 miles south-west), Barabhas (7 miles east) and West Side (7 miles east). Remote and island addresses need a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
Landmarks near Shawbost
Other landmarks nearby include Shawbost Folk Museum (0.7 miles north-east). Open spaces near Shawbost include Loch a' Bhaile.
Surface by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. We shape it by hand to follow the stone.
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
We also work for property managers and facilities teams in Shawbost and across Na h-Eileanan Siar. Several sites can be quoted together.
What affects the quote in Shawbost
For a quick quote, just ask. The main things that affect it are:
- Mould in or behind the old joints
- How much there is to do
- Any working-time requirements on site
- How many areas need sealing
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Helping us quote
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- Where the property is
- If someone has resealed it before
- Pictures of the joints, sent by email
Every job is quoted individually, so the first step is telling us about yours. Just send an email to info@mrmastic.co.uk with the details, and pictures are welcome.