Na h-Eileanan Siar · Scotland
New-build mastic & snagging in Steinis, Na h-Eileanan Siar
New build mastic in Steinis from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Gaps behind new kitchen upstands
- Plot mastic for developers ahead of handover
- Sealant applied over dusty or wet surfaces
How we handle new build mastic in Steinis
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. We work on show homes, skirting & floors and windows & doors, and common reasons people get in touch are cracks appearing as a new home settles and cracked caulk along new skirting.
New homes in smaller Scottish places are often single plots, self-builds or small developments. They need their sealant and floor joints finished just as carefully as on a big site.
Big or small, you get the same one-year guarantee in Steinis and across Na h-Eileanan Siar.
- Location
- Steinis (HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Why deal with it now?
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Around Steinis, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
Why choose Mr Mastic in Steinis
- You choose the colour before work begins
- Colour picked to suit the job
- An ARBOMaster approved applicator
- A choice of colours where the product allows
Read how sealant jobs are priced and our reviews.
Different surfaces, different methods
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Skirting and floors
As timber and screed dry, skirting and floors shift. Caulk cracks; a flexible sealant moves with it.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Open a window or run the fan after bathing
- Keep pictures and emails about snagging items
- Get a leaking seal dealt with right away
- Clean sealant with mild detergent, not abrasives
Watch the joints as the house settles. Small gaps can appear as the house dries.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left.
How the visit works
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for most snagging lists, longer for a run of plots. Outside jobs in Steinis need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- Each joint is checked for movement before we start.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Mention any tricky access
- Mention any parking rules near the property
Ask for a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll take it from there.
Advice
Steinis questions
Is there a guarantee on new build mastic in Steinis?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Is Steinis within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers the whole 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 does new build mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Should I go to my builder first?
If you are still within the builder’s snagging or warranty period, report it to them first. If it isn’t sorted, or keeps failing, get in touch with us.
Can you work from my snagging list?
Yes. Snagging lists are a common starting point for us. We agree the sealant items with you before work begins.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Should I wait before resealing?
If the seal has failed and water is getting in, do it now. Small gaps that are just cosmetic can be resealed once movement has slowed.
What new build mastic looks like in Steinis
Steinis is within about 1 mile of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so any gaps are best picked up early. Work on the islands has to be planned around ferry crossings and the weather, so the more notice, the better.
In and around Steinis, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Steinis is in Na h-Eileanan Siar. If you need new build mastic in Steinis, please drop us a line at info@mrmastic.co.uk for a quick quote. We are based in Crawley and cover Na h-Eileanan Siar, Steinis included. 87 places in Na h-Eileanan Siar are on our list, from the larger towns to small villages.
Here we cover the HS2 postcode area for new build mastic. If you’re just outside Steinis, we cover Plasterfield (1 mile south-west), Sandwick (1 mile south), Sanndabhaig (1 mile south), Stornoway (1 mile west) and Branahuie (1 mile south-east). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
What’s near Steinis
A little further out are Western Isles Hospital (1.3 miles west) and Lewis Loom Centre (1.5 miles west). Not far away are Loch Àirigh na Lic.
How we quote for new build mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Mould in or behind the old joints
- The number of rooms or windows
- How much there is to do
- Access and height
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, drop us a line at info@mrmastic.co.uk and we’ll give you an honest view and a quote.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- Where the job is, and your postcode
- The problem you’ve noticed
- A few pictures by email, if you can
- Whether it’s a home or a business
For new build mastic in Steinis, email us at info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
What we are called out for in Steinis
Fresh sealant can be knocked or cut by trades finishing off. A bead disturbed before it has cured may never seal properly and it shows once the home is in use.
If you can see any of these, it’s time to have the joints looked at:
- Skirting joints opening in the first winter
- Internal frame sealant that has split
- Untidy sealant flagged on a snagging list
- Plot mastic for developers ahead of handover
For jobs in and around Steinis, choosing the right material for each joint is as important as a tidy finish.
Before booking anyone
- Who turns up on the day
- Which colour the sealant will be
- What product goes in the joint
- What insurance they hold
Nearby places to Steinis
Other services in Steinis
What we can’t put right
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Deciding who is responsible under a builder’s warranty
- Cracking that points to a structural problem
- Baths and trays that move too much for sealant to cope with
If you are not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
What we seal
- Windows & doors
- Show homes
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Plot handovers