Shetland Islands · Scotland
Window Mastic in Melby
We cover Melby for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Black, perished sealant on frames
- Water coming in at the bottom corners of a door
- Hard, cracked sealant around windows
Window mastic in Melby, done properly
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on timber windows & doors, composite doors and aluminium frames, and people most often call us about damp patches on the reveal after heavy rain and cold air getting in at the frame edge.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
You get a one-year guarantee, the same in Melby as everywhere else we work.
- Place
- Melby (ZE2)
- Wider area
- Shetland Islands
- Cover
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Melby homes and the weather
Melby is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
In and around Melby, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Melby is in the Shetland Islands. Whether you are in the middle of Melby or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Melby is one of 63 places in the Shetland Islands we cover for window mastic.
Postcode districts we cover here for window mastic: ZE2. Nearby, we also carry out window mastic in Sandness (1 mile south-east), Walls (6 miles south-east), Aith (10 miles east), Easter Skeld (11 miles south-east) and Brae (12 miles north-east). Remote and island addresses need a little more planning, so please mention your location when you drop us a line at info@mrmastic.co.uk.
Landmarks near Melby
Open spaces near Melby include Loch of Norby.
What happens if it’s left?
Working on frames from a ladder with a sealant gun isn’t easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. 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.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Melby
- Anti-fungal sanitary silicone in wet areas
- A 12-month guarantee on all work
- An ARBOMaster approved applicator
- Over 20 years’ experience
Take a look at how sealant jobs are priced and customer reviews.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Keep paint and stain on wooden frames in good order
- Walk round the house once a year and look at the joints
- Ventilate rooms so frames don’t stay wet inside
- Make sure the drainage slots are not blocked
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
How it works
The work is kept neat and contained to the joints we’re treating. Expect the work to take most of a day for a typical house, less for a few frames, and we explain the cure time before we leave. Outdoor work around Melby depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- 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.
Before we arrive
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, email us at info@mrmastic.co.uk.
Advice
When something else is needed
In fairness, some problems need a different trade:
- Soft or decayed wood in the frame
- Draughts through the window seals rather than the frame
- Condensation trapped between the panes
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think before you book.
Joints and surfaces we work on
- uPVC windows
- Composite doors
- Patio & French doors
- Window sills
- Aluminium frames
- Timber windows & doors
Your questions about window mastic in Melby
Does living near the coast affect window mastic in Melby?
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.
Do you cover smaller places like Melby?
Yes. Melby is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland, including the islands, where work is planned around ferry crossings. Just mention lanes, gates or anything else about the route when you book.
Is the new sealant paintable?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Mention any painting plans before any work starts.
Do you have insurance?
Yes, we’re fully insured for every job we do.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Can landlords and businesses book you?
Yes. We work in homes, commercial premises and hotels, and we are fully insured.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Melby.
What we are called out for in Melby
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
The most common problems we see are:
- Rushed sealant from a window installation
- Cracked sealant at the sill ends
- A bead that does not match the frame
- Draughts coming in around windows and doors
Homes close to St Margaret's Kirk and Graveyard include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in.
What your quote should include
- What happens if they find a problem under the old sealant
- Whether they seal over old material or remove it
- When the joint can take water or movement
- Is VAT in the price?
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.