Na h-Eileanan Siar · Scotland
Sand Mastic in Garrabost
Professional sand mastic in and around Garrabost, with old sealant always removed completely and a 12-month guarantee.
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
How we handle sand mastic in Garrabost
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it and we will advise if you’re redecorating. We are often asked to deal with mastic worn away on windows facing the weather and gaps between timber frames and stone or brick, across timber door frames, period & listed homes and sash and case windows.
In and around a place like Garrabost, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Garrabost (HS2)
- Region
- Na h-Eileanan Siar
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How it works
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes a few hours for a single window, longer for several. In smaller Scottish places, parking is generally less of an issue than access and distance. Tell us how to find the property and how to reach the work.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Read more
Landlords, agents and businesses in Garrabost
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Garrabost, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
What we are called out for in Garrabost
Paint, silicone or cement used over old mastic causes problems. They don’t suit the joint and we normally remove them.
People normally contact us after spotting something like this:
- Modern sealant on a period surround
- Gaps where the frame meets the masonry
- Old sand mastic that has cracked, crumbled or fallen out
- Patchy fillers round a sash window
In and around Garrabost, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- How much experience the applicator has
- Which colour the sealant will be
Why it’s worth doing now in Garrabost
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. In an older home around Garrabost, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
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.
Why choose Mr Mastic in Garrabost
- Over 20 years’ experience
- Tidy, careful work
- One-year guarantee on every job
- Anti-fungal silicone where joints get wet
When it isn’t the sealant
Before you book, it’s worth knowing the limits too:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sashes that rattle, stick or won’t open
- Putty and glazing repairs
Not sure which it is? You can send an email to info@mrmastic.co.uk and we will tell you honestly before booking.
Where we work in Garrabost
- Sash and case windows
- Period & listed homes
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
Quotes for sand mastic in Garrabost
You will get a clear quote before any work starts. It takes into account:
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
- The number of rooms or windows
- Any working-time requirements on site
The cost reflects the work involved, not guesswork. That is why we ask about the job first and give you a clear quote before any work starts.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
Need a quote? Please email us at 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.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Do not paint over the new mastic
- Avoid patching sand mastic with silicone
- Take care around the mastic when scraping paint
- Make sure water runs off the sill
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
Frames and glazing around Garrabost
Garrabost 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’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.
Homes close to Parish Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Garrabost is in Na h-Eileanan Siar. Jobs in Garrabost get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. We cover 87 towns and villages across Na h-Eileanan Siar, large and small.
Work in HS2 is quoted and booked the same way as anywhere else. We cover properties on Graham Avenue and Claypark Road and the roads around them. Nearby, we also carry out sand mastic in Pabail Uarach (1 mile south-east), Sulaisiadar (1 mile north-east), Lower Bayble (1 mile south), Knock (2 miles south-west) and Na h-Eileanan an Iar (2 miles south-west). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Landmarks near Garrabost
Nearby you will also find Western Isles Hospital (5.7 miles west). Green spaces nearby include Loch an Tiumpan.
Nearby places to Garrabost
What else we do in Garrabost
Your questions about sand mastic in Garrabost
Is Garrabost in your area for sand mastic?
Yes, Garrabost is within the area we cover. We work across all of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing, and we’ll send you a clear quote.
Is sand mastic in a coastal place like Garrabost any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer, and we’ll say how long yours will take.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will talk you through it.
Do you work for landlords and businesses?
Yes. Domestic, commercial and hotel work are all part of what we do.
Do you take out the old sealant first?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
How do I get a quote for sand mastic in Garrabost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before we start.