Dundee · Scotland
Window & door mastic in St Marys, Dundee
Mastic around window and door frames, sills and patio doors for St Marys, backed by a 12-month guarantee. Ask us for a quote.
- Cracked or shrunken mastic around the frame
- Cracked internal joints between frame and plaster
- Old mastic that has gone black or come away
Window mastic for homes and businesses in St Marys
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. If the draught is through the window seals instead, we’ll tell you. If you’re dealing with untidy mastic left by window fitters and gaps between the frame and the inside reveal, we can help.
Tenement flats in Scotland’s cities often have windows high above the street, so the mastic outside can go unchecked for years. For a flat in St Marys, access is the first thing to plan.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- St Marys (DD3, DD2)
- Region
- Dundee
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we’re called out for in St Marys
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
It’s worth asking for a quote if you see:
- Water coming in at the bottom corners of a door
- Draughty joints inside around the window
- Gaps where the sill meets the wall
- Cold air getting in at the frame edge
Schools such as Lawside Academy are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- What product goes in the joint
- How long to leave it before use
- How the colour is chosen
- How the joint is cleaned and prepared
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Air rooms to keep condensation down around windows
- Look round the frames every year or so
- Do not aim a pressure washer at the joints
- Use gentle cleaners on frames and sealant
Try not to touch the new joint while it cures, for as long as we advise. Do not point a pressure washer at the joints.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
Quotes for window mastic in St Marys
The quote reflects the job in front of us. We take into account:
- Mould in or behind the old joints
- Any working-time requirements on site
- The number and length of the joints
- The old material and how stubborn it is
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and send you a clear quote before work begins.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- Photos by email, if that is easy
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
To get a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Your questions about window mastic in St Marys
How do repairs to the shared parts of a tenement in St Marys get organised?
Most tenements arrange shared repairs through the owners or a property factor. The Tenements (Scotland) Act 2004 covers the common parts where the deeds don’t, and we can quote for the factor or the owners directly.
Is window mastic in a coastal place like St Marys any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
How long will my window job take?
The work takes a few hours for a few frames, or a day or more for a whole house. Access and how stubborn the old mastic is affect the time most.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Are you insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Can resealing stop a draught around my window?
Yes, where the draught is at the frame edge. We find where the air is coming from before we reseal.
Where are you based?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
The process
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a morning for a couple of windows and a door. In a city area like St Marys, parking may be by permit or pay-and-display, so tell us what’s nearby. If you are in a flat, let us know how we get in at the street door.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
If you are in St Marys and need window mastic, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Advice
Why act early in St Marys
A quick bead over the top of old mastic looks like an easy fix, but new sealant can’t bond to old, crumbling mastic. It peels before long, and water still gets in behind. The old mastic has to come out. For landlords in St Marys, damp and leaks can be a Repairing Standard issue, so it’s worth fixing failed sealant before a tenant reports it.
Combining jobs into one visit normally makes better use of the time than several visits. You will get one clear quote for the whole job.
Why book with us
- More than 20 years in sealant work
- We are fully insured
- Anti-fungal sanitary silicone in wet areas
- A sealant colour to suit the surroundings
Landlords, agents and businesses in St Marys
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Draughts through the window seals rather than the frame
- Damp coming through the wall itself rather than the frame joint
- A sash or casement that will not close properly
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
Surfaces we seal
- Aluminium frames
- Window sills
- uPVC windows
- Timber windows & doors
- Composite doors
- Patio & French doors
Nearby places to St Marys
Other services in St Marys
Frames and glazing around St Marys
St Marys is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. Dundee’s older tenements are sandstone, and the city sits on the Firth of Tay, so the mastic around window and door frames on walls facing the water can take plenty of weather.
Historic houses such as Camperdown House, about 1.2 miles south-west, show how far back building around St Marys goes. Rented homes near Invergowrie station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
St Marys is about 2 miles north-west of Dundee, in Dundee. Every kind of property in St Marys can book us for window mastic. Every job comes with our 12-month guarantee. Our Dundee coverage runs to 50 places, and St Marys is one of them.
Postcode districts we cover here for window mastic: DD3 and DD2. We cover properties on Troon Road, Troon Avenue and Gullane Road and the roads around them. We also cover Ardler (1 mile south), Dryburgh (1 mile south), Camperdown (1 mile south-west), Lochee (1 mile south) and Birkhill (2 miles west). We also work in nearby towns such as 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). St Marys is one of the larger places we cover in Dundee.
Near you in St Marys
Around St Marys, our work takes us to homes and buildings near Cox Branch Library and Balgay Hill and the streets around them. For rail, the closest station is Invergowrie station, roughly 3 miles south-west of the centre. A little further out are Wellgate Centre (2.6 miles south-east) and Strathmartine Castle (1.5 miles north). Not far away are Balgay Hill and Trottick Mill Ponds.