Orkney Islands · Scotland
Window Mastic in Upper Sanday
Mastic around window and door frames, sills and patio doors in Upper Sanday, with a one-year guarantee on every job. Call for a quick quote.
- Cracked internal joints between frame and plaster
- Mastic that has split away from the wall
- Mastic that is falling out in pieces
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
We also work for property managers and facilities teams. Several sites can go on one quote, and we are fully insured.
Window mastic in Upper Sanday
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. Typical jobs include draughts coming in around windows and doors and gaps left after new windows were fitted, across window sills, patio & French doors and timber windows & doors.
Mastic can only go onto a dry joint, so outside work in Upper Sanday depends on the weather. Tell us about access to all the windows and doors, upstairs included.
There’s a 12-month guarantee on every job.
- Place
- Upper Sanday (KW17)
- Wider area
- Orkney Islands
- Cover
- One year on every job
- Quote
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Why it’s worth doing now in Upper Sanday
Choosing the product is half the job. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. In a place like Upper Sanday, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
Why us?
- Sealant colour chosen to suit
- Experience in homes, commercial sites and hotels
- 180+ five-star Google reviews
- Trusted Arbo and Everbuild sealants
Take a look at our cost guide or customer reviews.
Signs you need window mastic in Upper Sanday
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, and a gap filled solid can’t flex. Backing rod sets the right depth.
If you can see any of these, it’s time to have the joints looked at:
- Damp patches on the reveal after heavy rain
- A bead that does not match the frame
- Old mastic that has gone black or come away
- Untidy mastic left by window fitters
Whether the job is in Upper Sanday itself or nearby, the right material for each joint matters as much as a neat finish.
Before you book anyone
- Whether all the old sealant comes out first
- What product goes in the joint
- How long the guarantee is
- Whether you can choose the colour
Window mastic in Upper Sanday: local notes
Upper Sanday is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Island jobs need planning around ferries and the weather, so give us as much notice as you can.
In and around Upper Sanday, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Upper Sanday is about 7 miles south-east of Kirkwall, in the Orkney Islands. Wherever you are in the KW17 postcode area, our applicators can take on window mastic. Our the Orkney Islands coverage runs to 51 places, Upper Sanday among them.
Here we cover the KW17 postcode area for window mastic. If you’re just outside Upper Sanday, we cover Toab (2 miles north), Tankerness (3 miles north), St Mary's (3 miles west), Burray Village (6 miles south-west) and Kirkwall (7 miles north-west). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Around Upper Sanday
Nearby you’ll also find Graemeshall Museum (3.1 miles west). For a walk, there’s Eves Loch.
Your questions about window mastic in Upper Sanday
Do you cover smaller places like Upper Sanday?
Yes, Upper Sanday is covered. We work across all of Scotland, islands included, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Does the coastal weather in Upper Sanday affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Can you quote for more than one area?
Yes. More than one area can go on one quote.
When is the sealant fully cured?
Cure times vary by product and the temperature. Before we leave, we will tell you the cure time.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
How do I get a quote for window mastic in Upper Sanday?
It depends on the job, so we quote each one individually. For a quick quote, send an email to info@mrmastic.co.uk with a short description of the job.
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Rotten timber, which needs a joiner first
- Worn gaskets, brush seals or a door that has dropped
- Condensation trapped between the panes
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly before booking.
What we seal
- Timber windows & doors
- Composite doors
- Window sills
- Aluminium frames
- Patio & French doors
- uPVC windows
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Paint up to the joint, not over it
- Keep timber frames painted
- Keep drainage slots and sill grooves clear
- Wash the frames with mild soapy water
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
What affects the cost of window mastic
Every job gets its own quote. These are the things that affect it:
- The size of the job
- When we can work, for business premises
- Access and height
- Which sealant suits the joint
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Whether it has been sealed before
- The address or postcode of the job
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work and give you a clear price.
Also near Upper Sanday
Also in Upper Sanday
The process
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes most of a day for a typical house, less for a few frames. Outside jobs in Upper Sanday need a dry day, because sealant won’t bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors isn’t 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.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Clear items away from the joints we are working on
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
Want a quote for window mastic? Please drop us a line at info@mrmastic.co.uk with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.