Na h-Eileanan Siar · Scotland
Sand mastic for sash & case windows in Cuidhir, Na h-Eileanan Siar
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Cuidhir, with a 12-month guarantee on every job. Call for a quick quote.
- Tired mastic found when preparing windows for paint
- Draughts and rain around sash boxes
- Failed mastic on an exposed elevation
What the job involves on each surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Sand mastic for homes and businesses in Cuidhir
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic is the traditional choice, and we can replace one with the other. Common call-outs are for silicone on a period window that looks wrong and mastic round period door frames that has failed, across period & listed homes, sash and case windows and tenement windows.
Outdoor sealant needs a dry surface, so window work around Cuidhir is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
Your job is guaranteed for a year, as with all our work.
- Place
- Cuidhir (HS9)
- Region
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Honest limits
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Putty and glazing repairs
- Whether work needs listed building consent
- Damaged stone surrounds
Not sure which it is? You can email us at info@mrmastic.co.uk and we’ll tell you honestly before you book.
What we seal
- Tenement windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Period & listed homes
- Sash and case windows
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- Mould in or behind the old joints
- Any working-time requirements on site
- Whether the work is at height
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Asking for a quote
What to tell us when you ask for a quote:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- The address or postcode of the job
- Roughly how big the job is
To get a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Cuidhir questions
Does living near the coast affect sand mastic in Cuidhir?
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 normally the first to need attention.
Do you cover Cuidhir for sand mastic?
Yes, Cuidhir is within the area we cover. We work across all of Scotland. You can email us at info@mrmastic.co.uk and let us know what needs doing.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we are using and why.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. Then email us at info@mrmastic.co.uk.
Where are you based?
Our base is Crawley. Our area covers South East England, London and Scotland.
What’s sand mastic made of?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Signs you need sand mastic in Cuidhir
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
Keep an eye out for any of the following:
- Weathered mastic on the most exposed windows
- Cement or filler used on old window joints that has cracked
- Gaps where the frame meets the masonry
- Window mastic to renew ahead of painting
Around Cuidhir, as everywhere, sand mastic is only as good as the preparation behind it.
Questions to ask before booking
- Is the old sealant removed completely?
- Are they insured?
- Which sealant they’ll use, and why
- How much experience the applicator has
Frames and glazing around Cuidhir
Cuidhir is within about 2 miles 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. Island jobs need planning around ferries and the weather, so the more notice, the better.
Homes close to Cuier Parish Church and Churchyard include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Cuidhir is in Na h-Eileanan Siar. For sand mastic in and around Cuidhir, please send an email to info@mrmastic.co.uk for a quick quote. We are based in Crawley and cover Na h-Eileanan Siar, Cuidhir included. Cuidhir is one of 87 towns and villages in Na h-Eileanan Siar where we work.
All of HS9 is covered for sand mastic, from the main roads to the quietest streets. We cover properties on Rathad na Ceardaich and Cuithir. Nearby, we also carry out sand mastic in Brèibhig (3 miles south), Ceann Tangabhal (3 miles south), Eòlaigearraidh (3 miles north-east), Castlebay (3 miles south) and Bàgh a'Chaisteil (3 miles south). Island and remote addresses take a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
Local landmarks in Cuidhir
A little further out are St Brendan's Hospital (3.5 miles south) and Museum Bharraigh Agus Bhatarsaidh (3.2 miles south). The countryside around Cuidhir includes Ben Cliad.
Places near Cuidhir
Other services in Cuidhir
How the visit works
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and tidy away. Most jobs take a few hours per window, depending on the condition of the joints. Around Cuidhir, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- 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 isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Clear the area around the work
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, email us at info@mrmastic.co.uk.
Advice
Leave it or put it right?
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
What it costs depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Why Cuidhir customers choose us
- 20+ years of sealant experience
- Every job guaranteed for a year
- Rated 4.9 stars on Google
- Trusted Arbo and Everbuild sealants
Take a look at what affects the cost or our reviews.