Na h-Eileanan Siar · Scotland
Sand Mastic in Steinis
Specialist sand mastic for Steinis: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
- Mastic that needs renewing before redecorating
Sand mastic in Steinis, done properly
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead and we will explain which is best for yours. Typical jobs include gaps between timber frames and stone or brick and draughty sash windows at the surround, across tenement windows, timber door frames and sash and case windows.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
Your job is guaranteed for a year, as with all our work.
- Where
- Steinis (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What happens if it’s left?
If you are redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. In a place like Steinis, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
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 will get one clear quote for the whole job.
Why choose Mr Mastic in Steinis
- Any old sealant cut out fully, not covered over
- We’re fully insured
- Experience in homes, commercial sites and hotels
- We leave the area clean and tidy
Take a look at our cost guide and customer reviews.
Surface by surface
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
Also near Steinis
More services for Steinis
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sand mastic in Steinis: local notes
Steinis is close to 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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
Around Steinis, as everywhere, sand mastic is only as good as the preparation behind it.
Steinis is in Na h-Eileanan Siar. Wherever you are in the HS2 postcode area, we can carry out sand mastic at your property. Steinis is one of 87 places in Na h-Eileanan Siar where we work for sand mastic.
Postcode districts we cover here for sand mastic: HS2. Neighbouring places we cover for sand mastic include Plasterfield (1 mile south-west), Sandwick (1 mile south), Sanndabhaig (1 mile south), Stornoway (1 mile west) and Branahuie (1 mile south-east). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Local landmarks in Steinis
A little further out are Western Isles Hospital (1.3 miles west) and Lewis Loom Centre (1.5 miles west). The countryside around Steinis includes Loch Àirigh na Lic.
The process
There is not much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows. Outdoor work around Steinis depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Let us know about parking restrictions
- Tell us about any water getting in
- Keep children and pets away from the work area
Get a quote
Every job is quoted individually, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job and send photos if you have them.
Advice
Your questions about sand mastic in Steinis
Is Steinis within the area you cover?
Yes, Steinis is covered. We work across all of Scotland, islands included, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you do sand mastic in Steinis?
Yes. Our work covers the whole of Scotland, and Steinis is part of that. Just email us at info@mrmastic.co.uk with a few details of the job, and we will give you a clear price.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
How long does sand mastic take to harden?
It takes a while. The skin forms first, and the full set comes later and we will give you an idea for your job.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Quotes for sand mastic in Steinis
Jobs vary more than people expect. The main factors:
- The product the joint needs
- The amount of work
- Mould in or behind the old joints
- When we can work, for business premises
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please drop us a line at info@mrmastic.co.uk and we will talk you through it.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Pictures of the joints, sent by email
- The rough size of the job
- How we’d reach the joints
- The problem you’ve noticed
Need a quote? Please email us at info@mrmastic.co.uk and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Common problems we fix in Steinis
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
It’s worth asking for a quote if you see:
- Modern sealant on a period surround
- Window mastic to renew ahead of painting
- Mastic dropping out of the joint
- Open joints round the window box
Whether the job is in Steinis itself or nearby, the right material for each joint matters as much as a neat finish.
What to look for in a quote
- What happens if they find a problem under the old sealant
- What insurance they hold
- Whether you can choose the colour
- How long the guarantee is
Landlords, agents and businesses in Steinis
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.