Highland · Scotland
Dunbeath Window Mastic
Window mastic across Dunbeath and nearby, with every bit of old sealant taken out first.
- Old mastic that has gone black or come away
- Cracked sealant at the sill ends
- Gaps left after new windows were fitted
Window mastic in Dunbeath, done properly
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. Typical jobs include hard, cracked sealant around windows and sealant in the wrong colour for the frame, across composite doors, aluminium frames and window sills.
Outdoor sealant needs a dry surface, so window work around Dunbeath is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
Whatever the size of the job, you get the same 12-month guarantee.
- Place
- Dunbeath (KW6)
- Region
- Highland
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Landlord and commercial work in Dunbeath
In hotels, rooms out of use cost money, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Also near Dunbeath
What else we do in Dunbeath
Why act early in Dunbeath
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Why us?
- We never seal over old sealant
- Anti-fungal silicone where joints get wet
- We are fully insured
- Rated 4.9 stars on Google
Take a look at what affects the cost or what customers say.
Signs you need window mastic in Dunbeath
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
It’s worth asking for a quote if you see:
- Mastic that’s falling out in pieces
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
- Hard, cracked sealant around windows
For jobs in and around Dunbeath, choosing the right material for each joint is as important as a tidy finish.
Comparing quotes
- Is VAT in the price?
- What guarantee comes with the work
- How the joint is cleaned and prepared
- Are they insured?
Your questions about window mastic in Dunbeath
Does the coastal weather in Dunbeath affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Will you come out to Dunbeath?
Yes, Dunbeath is covered. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Can new window sealant be painted?
It depends on the sealant. Some hybrid sealants can be painted; silicone can’t. Tell us if you’re decorating and we will choose accordingly.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
How many windows can you do in a day?
That depends on the number of frames, how they’re reached and the state of the old mastic. We will tell you how long your job needs when we quote.
Do you have insurance?
Yes. We are fully insured.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes most of a day for a typical house, less for a few frames. Outside jobs in Dunbeath need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors is not affected.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
Get a quote
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Read more
What sealant work can’t fix
It helps to know what we can’t do:
- A failed sealed unit that has misted up
- Faulty window hardware
- Rotten timber, which needs a joiner first
Not sure which it is? You can email us at info@mrmastic.co.uk and we’ll tell you honestly.
What we seal
- uPVC windows
- Timber windows & doors
- Patio & French doors
- Window sills
- Aluminium frames
- Composite doors
Windows and doors in Dunbeath
Dunbeath is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Around Dunbeath, as everywhere, window mastic is only as good as the preparation behind it.
Dunbeath is about 24 miles south of Thurso, in Highland. Every kind of property in Dunbeath can book us for window mastic, old or new, large or small. Every job comes with our one-year guarantee. We cover 253 towns and villages across Highland, from the larger towns to small villages.
Here we cover the KW6 postcode area for window mastic. Whether your property is on Portormin Road and Knockglass Road or anywhere close by, we can help. Other places close to Dunbeath include Balnabruich (1 mile west), Berriedale (5 miles south-west), Lybster (6 miles north-east), Navidale (11 miles south-west) and East Helmsdale (12 miles south-west). For island and remote addresses, a little more planning is needed, so mention it when you ask for a quote.
Local landmarks in Dunbeath
Nearby you will also find Dunbeath Castle (0.9 miles south) and Laidhay Croft Museum (0.7 miles north-east).
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Keep solvents and bleach off the sealant
- Clear any debris from frame drain holes
- Do not aim a pressure washer at the joints
- Repaint timber before it’s bare
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Water trapped behind a failed joint can start rot in timber frames and sills. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
Can I do it myself?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
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.