Argyll and Bute · Scotland
New Build Mastic in Portnahaven
Plot mastic for developers and snagging failed sealant in new homes in Portnahaven, with a 12-month guarantee on every job. Call for a quick quote.
- New-build shower sealant that has already split
- Smeared, uneven beads picked up at snagging
- Sealant applied over dusty or wet surfaces
Surface by surface
Plot handovers
Send us the schedule and any sealant specification for a quote. We seal bathrooms, kitchens, frames and floors as agreed.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish. We’ll plan around viewing times.
How we handle new build mastic in Portnahaven
Dust is the enemy of new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks. If you are dealing with new-build shower sealant that has already split and cracked sealant around new window and door frames, we can put it right, whatever the surface.
Around smaller Scottish places like Portnahaven, new homes tend to be single plots or small developments. They need their sealant and floor joints finished just as carefully as on a big site.
Every job is covered by our 12-month guarantee, wherever you are in Argyll and Bute.
- Place
- Portnahaven (PA47)
- Region
- Argyll and Bute
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
If you manage several properties in or around Portnahaven, several properties can be quoted together. Send us the addresses and the work at each.
When something else is needed
Before booking, it’s worth knowing the limits too:
- Plumbing faults behind the sealant
- Disputes or warranty claims with your builder
- Movement caused by a poorly fitted tray or bath
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
Joints and surfaces we work on
- Show homes
- Plot handovers
- Kitchens
- Skirting & floors
- Bathrooms & en suites
- Windows & doors
Joints and finishes in Portnahaven homes
Portnahaven is close to the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. Many new homes in Scotland are timber-framed, and as the frame dries and settles, skirting and sealant joints can open up.
Whether the job is in Portnahaven itself or nearby, the right material for each joint matters as much as a neat finish.
Portnahaven (Gaelic: Port na h-Abhainne) is in Argyll and Bute. Wherever you are in the PA47 postcode area, our applicators can take on new build mastic. 118 places in Argyll and Bute are on our list.
All of PA47 is within our area for new build mastic, from the main roads to the quietest streets. We cover properties on High Street, Shore Street and Church Street. If you’re just outside Portnahaven, we cover Bun Othan (1 mile south), Port Charlotte (6 miles north-east), Bowmore (10 miles north-east), Imeraval (12 miles east) and Port Ellen (13 miles east). If you are somewhere remote, a little more planning is needed.
Around Portnahaven
For a walk, there’s Beinn Tart a' Mhill.
FAQs for Portnahaven
Do you cover Portnahaven for new build mastic?
Yes, Portnahaven is within the area we cover. We work across all of Scotland. You can email us at info@mrmastic.co.uk and tell us what needs doing.
Is Portnahaven within the area you cover?
Yes, we do. Our work covers the whole of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you match the sealant colour to my new kitchen or bathroom?
White and clear are the most common, but other colours are available. We match the colour to the finish before we begin.
Are you insured?
Yes. We are fully insured.
Do you work through snagging lists?
Yes. Send us the sealant items on the list, with pictures if you can. We’ll tell you if anything on it isn’t a sealant job.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
Do you guarantee your work?
Yes, always. There’s a 12-month guarantee on every job.
The process
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes a few hours in a single home in most cases. For a place like Portnahaven, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- Failed or untidy sealant is cut out completely.
- Each joint is cleaned of dust and grit, then primed if required.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Finally, each room is checked and you’re given the cure time.
Preparing for the visit
- Move anything stored near the joints
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Read more
Towns and villages near Portnahaven
What else we do in Portnahaven
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Leave it or put it right?
A hairline gap at a skirting can wait, but water getting through cannot. If you are unsure which you have, send an email to info@mrmastic.co.uk with pictures. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Why Portnahaven customers choose us
- 12-month guarantee on every job
- Homes, businesses and hotels
- Neat joints and a tidy finish
- Anti-fungal sanitary silicone in wet areas
Read what affects the cost or customer reviews.
When to call us in Portnahaven
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints are not always given time to dry before the sealant goes on.
Keep an eye out for these signs:
- Smeared, uneven beads picked up at snagging
- Internal frame sealant that has split
- Sealant applied over dusty or wet surfaces
- Cracks appearing as a new home settles
In and around Portnahaven, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- Who does the work, and how experienced they are
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- Whether you can choose the colour