Na h-Eileanan Siar · Scotland
New-build mastic & snagging in Back, Na h-Eileanan Siar
New build mastic for Back, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Plot mastic for developers ahead of handover
- Skirting joints opening in the first winter
- Gaps behind new kitchen upstands
New build mastic for homes and businesses in Back
Developers send us the plot schedule and we work through it. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover using the right product for each joint. If you have untidy sealant flagged on a snagging list and joints pulling apart as timber shrinks, we can help, on show homes, kitchens and plot handovers alike.
Many newer homes in Scotland are timber-framed and settle as they dry out, so skirting and floor joints can open up. In older homes, timber floors move through the year too.
A 12-month guarantee comes as standard.
- Place
- Back (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How the visit works
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it generally takes a few hours for most snagging lists, longer for a run of plots. In smaller Scottish places, parking is usually less of an issue than access and distance. Tell us how to find the property and how to reach the work.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out, with no layer left behind.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Before we arrive
- Mention if the joints have been sealed before
- Move anything stored near the joints
- On commercial sites, let us know about site rules
How to get a quote
Want a quote for new build mastic? Please email us at info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.
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What affects the cost of new build mastic
The price is agreed before any work begins. It takes into account:
- The type of sealant required
- Working hours on commercial sites
- The number of rooms or windows
- How easy the joints are to reach
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, send an email to info@mrmastic.co.uk for an honest opinion and a quote.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Pictures of the joints, sent by email
- The type of property
- The rough size of the job
- The problem you’ve noticed
We don’t publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, send an email to info@mrmastic.co.uk.
What new build mastic looks like in Back
Back is close to the coast. New homes near the sea put their outside mastic to work from day one, so any gaps are best picked up early. Back is in the west of Scotland, which is wetter than the east, so there’s plenty of rain for plot mastic and the sealant in new homes to keep out.
For jobs in and around Back, choosing the right material for each joint is as important as a tidy finish.
Back is about 6 miles north-east of Stornoway, in Na h-Eileanan Siar. For new build mastic in and around Back, 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. Our Na h-Eileanan Siar coverage runs to 87 places, Back among them.
All of HS2 is within our area for new build mastic. If you need new build mastic at a property on Broadbay View, Rathad na Sgoile and Sraid na H-Eaglaise or anywhere close by, our applicators can take on the job. If you are just outside Back, we cover Sulaisiadar (5 miles south-east), Garrabost (5 miles south-east), Na h-Eileanan an Iar (5 miles south), Knock (5 miles south) and Aiginis (5 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 Back
Other landmarks nearby include Western Isles Hospital (5.4 miles south-west). Open spaces near Back include Loch Langavat.
Questions from Back
Will you come out to Back?
Yes, Back 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.
What guarantee comes with new build mastic in Back?
All our work, in Back and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Do you use white or clear sealant?
We use white, clear or a colour to suit the finishes. Let us know your preference when you ask for a quote.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
When is the best time to reseal in a new build?
Where water is getting through, don’t wait. Hairline cosmetic gaps can wait until the house has settled.
Do you work for developers?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. Good preparation keeps snagging to a minimum.
Can tenants book the work?
Yes. Check with your landlord; we can send the quote to them too.
Common problems we fix in Back
Not every new-build joint gets the right sealant: decorators’ caulk in a wet area, or a stiff sealant where there’s movement. Both fail early.
Common reasons people contact us are:
- Gaps between new skirting and floors
- Messy sealant that spoils new finishes
- Internal frame sealant that has split
- New-build shower sealant that has already split
In and around Back, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- What the cure time is
- Whether they’re fully insured
- Is VAT in the price?
- What happens if the job turns out different
How the job changes by surface
Windows and doors
A draught at a new window can be a missed or failed joint. We look at the joints and reseal where needed.
Skirting and floors
Gaps under skirting are one of the most common new-build snags. We seal it with a flexible sealant that copes with the movement.
Landlord and commercial work in Back
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Landlords and letting agents in Back can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
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.
What else we do in Back
Leave it or put it right?
For developers, getting the sealant right first time saves return visits. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. In an older home around Back, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why Back customers choose us
- 180+ five-star Google reviews
- Sealant colour chosen to suit
- We are fully insured
- We agree the colour with you first
See our cost guide and what customers say.