Shetland Islands · Scotland
Cunningsburgh Window Mastic
Specialist window mastic for Cunningsburgh: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Sealant in the wrong colour for the frame
- Cracked internal joints between frame and plaster
- Rushed sealant from a window installation
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
How we handle window mastic in Cunningsburgh
Around Cunningsburgh we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on composite doors, patio & French doors and uPVC windows, and the jobs we see most are old mastic that has gone black or come away and white mastic on grey or black frames.
In and around a place like Cunningsburgh, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Cunningsburgh (ZE2)
- Region
- Shetland Islands
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Do you need window mastic in Cunningsburgh?
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that can’t keep up eventually tears.
Most people get in touch after spotting one of these:
- Water coming in at the bottom corners of a door
- Gaps left after new windows were fitted
- Hard, cracked sealant around windows
- Cracked internal joints between frame and plaster
In and around Cunningsburgh, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- The length of the guarantee
- Whether they’re fully insured
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
When it is not the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- Penetrating damp from a failed cavity tray or render
- A failed sealed unit that has misted up
- Soft or decayed wood in the frame
If in doubt, drop us a line at info@mrmastic.co.uk and we’ll say what we think.
Joints and surfaces we work on
- uPVC windows
- Patio & French doors
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
Your questions about window mastic in Cunningsburgh
Is window mastic in a coastal place like Cunningsburgh any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Is Cunningsburgh within the area you cover?
Yes, Cunningsburgh is covered. Our work covers the whole of Scotland, islands included, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can new window sealant be painted?
It depends on the sealant. Some hybrid sealants can be painted; silicone cannot. Tell us if you’re decorating and we’ll choose accordingly.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Can you reach windows above the ground floor?
Generally, yes. Access is planned before work begins.
Do you work for landlords and businesses?
Yes. As well as householders, we work for landlords, agents, businesses and hotels.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Landlord and commercial work in Cunningsburgh
We also work for property managers and facilities teams in Cunningsburgh and across the Shetland Islands. We can quote a run of properties together, and we’re fully insured for the work.
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.
Why deal with it now?
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Around Cunningsburgh, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
The cost depends on how much there is to do, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Cunningsburgh
- White, clear, grey or another colour, product permitting
- We are fully insured
- A sealant colour to suit the surroundings
- Every job guaranteed for a year
How to look after the new joints
A little care helps the new joints last. We recommend:
- Look round the frames every year or so
- Make sure the drainage slots aren’t blocked
- Clean frames with a soft cloth and soapy water
- Keep solvents and bleach off the sealant
Check the drainage slots in the frames are not blocked, so rain drains out rather than building up at the sealant.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Frames and glazing around Cunningsburgh
Cunningsburgh is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around window and door frames, especially on the side facing the sea. Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
For jobs in and around Cunningsburgh, choosing the right material for each joint is as important as a tidy finish.
Cunningsburgh is in the Shetland Islands. Every kind of property in Cunningsburgh is covered for window mastic. The work is guaranteed for a year. Cunningsburgh is one of 63 places in the Shetland Islands we cover for window mastic.
We work across ZE2 for window mastic. That includes homes and businesses on St Clair Road, Laxdale Road and Pundsta Place. Nearby, we also carry out window mastic in Bremirehoull (1 mile south), Aithsetter (1 mile east), Mail (1 mile south), Sandwick (4 miles south) and Hoswick (4 miles south). Larger places within reach include Lerwick (7 miles north), Sound (7 miles north) and Scalloway (6 miles north). Cunningsburgh is one of the larger places we cover in the Shetland Islands. Remote and island addresses need a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Landmarks near Cunningsburgh
Green spaces nearby include Loch of Fladdabister.
Places near Cunningsburgh
More services for Cunningsburgh
What happens on the day
The work is kept neat and contained to the joints we’re treating. The job normally takes a morning for a couple of windows and a door, and we explain the cure time before we leave. In smaller Scottish places, parking is generally less of an issue than access and distance. Let us know how to find you and how to reach the joints.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Let us know about parking restrictions
- For business premises, tell us about site rules or sign-in
- Try not to wet indoor joints just before the visit
Get a quote
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job.