Na h-Eileanan Siar · Scotland
New-build mastic & snagging in Sandwick, Na h-Eileanan Siar
We cover Sandwick for plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Sealant work across a run of new homes
- Skirting joints opening in the first winter
- Kitchen sealant that has pulled off the wall
New build mastic in Sandwick, done properly
In a new home, every joint should have a clean, even bead. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water reaches anything behind it. We are often asked to deal with beads laid onto grit and dust from the build and leaking shower tray seals in a new home, on show homes, plot handovers and skirting & floors.
Many newer homes in Scotland are timber-framed and settle as they dry out, which shows as gaps at skirtings and floor joints. In older homes, timber floors move through the year too.
The work is covered for a year after we finish. If there’s a problem with it, please send an email to info@mrmastic.co.uk.
- Place
- Sandwick (HS1, HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What we can’t put right
Sealant is not the answer to every problem, and we will tell you before work begins. Sealant will not put right:
- Settlement cracks that need a surveyor
- Leaking fittings rather than failed sealant
- Disputes or warranty claims with your builder
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer before booking.
Where we work in Sandwick
- Plot handovers
- Skirting & floors
- Windows & doors
- Kitchens
- Show homes
- Bathrooms & en suites
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
New build mastic around Sandwick
Sandwick is within about 1 mile of the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. Work on the islands has to be planned around ferry crossings and the weather, so the more notice, the better.
For jobs in and around Sandwick, choosing the right material for each joint is as important as a tidy finish.
Sandwick is about 1 mile south-east of Stornoway, in Na h-Eileanan Siar. If you need new build mastic in Sandwick, please send an email to info@mrmastic.co.uk for a quick quote. We’re based in Crawley and cover Na h-Eileanan Siar. Sandwick is one of 87 towns and villages in Na h-Eileanan Siar where we work for new build mastic.
Here we cover the HS1 and HS2 postcode area for new build mastic. Streets in the area include Stoneyfield, East Street and Olivers Brae. Nearby, we also carry out new build mastic in Plasterfield (1 mile north), Sanndabhaig (1 mile east), Steinis (1 mile north), Stornoway (1 mile north-west) and Branahuie (1 mile east). Island and remote addresses take a little more planning, so please mention your location when you drop us a line at info@mrmastic.co.uk.
Near you in Sandwick
Other landmarks nearby include Western Isles Hospital (1.5 miles north-west) and Lewis Loom Centre (1.3 miles west). Not far away are Loch Àirigh na Lic.
How the job changes by surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
Plot handovers
Good preparation at handover saves snagging later. Dust from the build is removed first and prime where the product needs it.
Towns and villages near Sandwick
More services for Sandwick
Your questions about new build mastic in Sandwick
What guarantee comes with new build mastic in Sandwick?
All our work, in Sandwick and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Is Sandwick within the area you cover?
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 sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint before we leave.
I’m a tenant. Can you help?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Can new sealant go on top of the old bead?
No. Sealing over old sealant looks fine for a few weeks, then lifts. All the old sealant comes out before any work starts.
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
What happens if it’s left?
A quick bead over the top of the old sealant can look fine at first, but it can’t bond to what’s underneath. A lasting seal starts with removing the old one completely. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, drop us a line at info@mrmastic.co.uk and we’ll give you an honest view and a quote.
Why Sandwick clients choose us
- Sealant colour chosen to suit
- Anti-fungal sanitary silicone in wet areas
- More than 20 years in sealant work
- 4.9 on Google from 180+ five-star reviews
See our cost guide or our reviews.
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for most snagging lists, longer for a run of plots, depending on the size of the job. Outdoor work around Sandwick depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
- Clear items away from the joints we’re working on
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, drop us a line at info@mrmastic.co.uk.
Related advice
What we are called out for in Sandwick
New homes are full of moisture from plaster, screed and concrete, and it dries out over the first couple of years. As it does, timber shrinks and joints open.
The most common problems we see are:
- Second-fix sealing on new plots
- Cracked sealant around new window and door frames
- Sealant applied over dusty or wet surfaces
- Shower seals failing in the first year or two
In and around Sandwick, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- Whether all the old sealant comes out first
- How hidden problems are handled
- How much experience the applicator has
- Is VAT in the price?