Na h-Eileanan Siar · Scotland
New Build Mastic in Grimsay
Our applicators work in Grimsay on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Joints pulling apart as timber shrinks
- Sealant work across a run of new homes
- Beads laid onto grit and dust from the build
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
About our new build mastic in Grimsay
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. We work on skirting & floors, bathrooms & en suites and show homes, and people most often call us about untidy sealant flagged on a snagging list and sealant that never bonded to the surface.
For a place like Grimsay, the journey and access are planned in advance. Inside work goes ahead in any weather; outside mastic needs a dry day.
Our work is backed for twelve months, in Grimsay and everywhere else we cover.
- Place
- Grimsay (HS7)
- Wider area
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Your questions about new build mastic in Grimsay
Is there a guarantee on new build mastic in Grimsay?
All our work, in Grimsay and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Is Grimsay within the area you cover?
Yes, Grimsay is covered. Our work covers the whole of Scotland, islands included, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
My new home is still under warranty. Should I contact you?
If you are still within the builder’s snagging or warranty period, report it to them first. If it is not sorted, or keeps failing, get in touch with us.
Will you just run a new bead over the existing one?
No. Over-sealing traps mould and water and soon fails. All the old sealant comes out before any work starts.
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.
How much does new build mastic cost in Grimsay?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Where do you work from?
Our base is Crawley. Our area covers South East England, London and Scotland.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
What the job involves on each surface
Plot handovers
Developers can send the plot schedule and specification. We seal bathrooms, kitchens, frames and floors.
Windows and doors
Internal joints between frames and plaster often crack as a new house dries. We cut out the cracked bead and reseal with a flexible sealant that suits the frame.
Landlord and commercial work in Grimsay
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Towns and villages near Grimsay
Other services in Grimsay
Why deal with it now?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Resealing promptly protects the new finishes around it. Around Grimsay, water from a failed joint in an older stone home can soak into timber and plaster.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Grimsay customers choose us
- Full insurance on every job
- More than 20 years in sealant work
- A choice of colours where the product allows
- Anti-fungal silicone where joints get wet
See how sealant jobs are priced and our reviews.
What we cannot put right
In fairness, there are a few things sealant will not fix:
- Plumbing faults behind the sealant
- Your warranty claim itself, which is between you and the builder
- Cracking that points to a structural problem
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly before you book.
Surfaces we seal
- Windows & doors
- Show homes
- Plot handovers
- Skirting & floors
- Bathrooms & en suites
- Kitchens
Joints and finishes in Grimsay homes
Grimsay is within about 1 mile of the coast. New homes near the sea put their outside mastic to work from day one, so any gaps are best picked up early. Grimsay is in the west of Scotland, which is wetter than the east, which means plot mastic and the sealant in new homes has to cope with a lot of rain.
In and around Grimsay, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. For jobs in and around Grimsay, choosing the right material for each joint is as important as a tidy finish.
Grimsay (Gaelic: Griomasaigh) is in Na h-Eileanan Siar. Wherever you are in the HS7 postcode area, we can carry out new build mastic at your property. Grimsay is one of 87 towns and villages in Na h-Eileanan Siar we cover.
Here we cover the HS7 postcode area for new build mastic. You’ll find Grimsay on the B891, so it’s easy for us to get to with everything needed for new build mastic. Other places close to Grimsay include Creag Ghoraidh (2 miles west), Geirinis (5 miles south-west), Balivanich (5 miles north-west), Baile a' Mhanaich (6 miles north-west) and Locheport (10 miles north). 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.
Landmarks near Grimsay
Other landmarks nearby include Museum nan Eilean Lionacleit (3.1 miles west) and Borve Castle (3.7 miles north-west). Not far away are Loch Langavat and Stiaraval.
How we quote for new build mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
- How much there is to do
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please email us at info@mrmastic.co.uk and we’ll talk you through it.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Photos by email, if that’s easy
- The problem you’ve noticed
- Where the property is
- Access, such as stairs, a lift or height
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
What we do, step by step
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for most snagging lists, longer for a run of plots. Around Grimsay, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- We look at why each joint failed, including any movement.
- 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.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
How to get a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we will take it from there.