Dundee · Scotland
New-build mastic & snagging in St Marys, Dundee
Plot mastic for developers and snagging failed sealant in new homes in St Marys, with a 12-month guarantee on every job. Call for a quick quote.
- Cracked sealant around new window and door frames
- Gaps opening as the house dries out and settles
- Untidy sealant flagged on a snagging list
Honest limits
We will not take on work that won’t last, so these are the limits:
- Settlement cracks that need a surveyor
- Damaged fittings that need replacing
- A tray or bath that isn’t properly supported, until it’s fixed
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
What we seal
- Kitchens
- Windows & doors
- Show homes
- Bathrooms & en suites
- Plot handovers
- Skirting & floors
New build mastic in St Marys, done properly
New homes move as they dry out. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. Typical jobs include beads laid onto grit and dust from the build and cracked caulk along new skirting, across plot handovers, bathrooms & en suites and show homes.
Offices, shops and commercial units in Scotland’s cities have floors with movement joints and thresholds that take heavy wear. In St Marys, we cover those floor joints as well as plot mastic for developers.
We stand behind the work with a one-year guarantee, so you are covered after we’ve gone.
- Location
- St Marys (DD3, DD2)
- Wider area
- Dundee
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the number of plots. In a Scottish city, a lot of jobs are in tenement flats, up a common stair from a shared close. For a job in St Marys, tell us the floor, how the door entry system works and where we can park nearby.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- Each joint is cleaned of dust and grit, then primed if required.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Move anything stored near the joints
- Mention any parking rules near the property
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
Questions from St Marys
I let a flat near Invergowrie station. Can you help?
Yes. We work for landlords and letting agents as well as householders, and several properties can be quoted together. Just drop us a line at info@mrmastic.co.uk with the address and what needs doing, and we will send you a clear quote.
Do you cover St Marys for new build mastic?
Yes, St Marys is within the area we cover. Our work covers the whole of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months.
How long will you be here?
That depends on how much there is to do, but most jobs take a few hours for most snagging lists, longer for a run of plots. We’ll tell you when we quote.
What does new build mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, drop us a line at info@mrmastic.co.uk and tell us what needs doing and where.
When is the best time to reseal in a new build?
For failed seals that let water through, the best time is now. For small cosmetic gaps, waiting until the house has settled can save doing them twice.
Why it’s worth doing now in St Marys
A hairline gap at a skirting can wait, but a leaking seal cannot. If you are unsure which you have, email us at info@mrmastic.co.uk with photos. Scottish rain finds any gap around a frame or wall joint, and in St Marys, damp can spread through stone and plaster before anyone sees it.
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
Why us?
- Colour picked to suit the job
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
- An ARBOMaster approved applicator
Landlord and commercial work in St Marys
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
If you manage several properties in or around St Marys, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
New build mastic around St Marys
St Marys is within about 3 miles of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, 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.
If you’ve bought a new home near Invergowrie station, the sealant around baths, showers and frames is worth checking in the first year or two.
St Marys is about 2 miles north-west of Dundee, in Dundee. Whether you are in the middle of St Marys or further out, new build mastic is available for homes and businesses alike. St Marys is one of 50 places in Dundee we cover for new build mastic.
All of DD3 and DD2 is within our area for new build mastic. If you need new build mastic at a property on Troon Road, Troon Avenue and Gullane Road or anywhere close by, we can help. Close by, we work in Ardler (1 mile south), Dryburgh (1 mile south), Camperdown (1 mile south-west), Lochee (1 mile south) and Birkhill (2 miles west). Larger places within reach include Broughty Ferry (6 miles east), Stobswell (3 miles south-east), Monifieth (7 miles east), Barnhill (6 miles east), Pitkerro (3 miles east) and Whitfield (3 miles east). Being one of Dundee’s larger places, St Marys has every kind of property, from flats to offices.
Landmarks near St Marys
Around St Marys, our work takes us to homes and buildings near Cox Branch Library and Balgay Hill. For rail, the closest station is Invergowrie station, roughly 3 miles south-west. Other landmarks nearby include Wellgate Centre (2.6 miles south-east) and Strathmartine Castle (1.5 miles north). Not far away are Balgay Hill and Trottick Mill Ponds.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Keep water off fresh sealant until it has cured
- Check bath and shower seals every few months as the house settles
- Do not wait for the house to settle if water is getting through
- Ventilate bathrooms well, especially in the first year
Keep pictures of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black keeps the job straightforward.
Towns and villages near St Marys
Other services in St Marys
Do you need new build mastic in St Marys?
Sealant applied onto damp surfaces doesn’t bond well. Site programmes do not always leave time for joints to dry.
Most people get in touch when they notice one of these:
- Sealant applied over dusty or wet surfaces
- Untidy sealant flagged on a snagging list
- Plot mastic for developers ahead of handover
- Skirting joints opening in the first winter
In and around St Marys, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- Which colour the sealant will be
- What product goes in the joint
- What preparation is included
- What happens if they find a problem under the old sealant