Orkney Islands · Scotland
Window Mastic in Hoy
Professional window mastic in and around Hoy, with old sealant always removed completely.
- Black, perished sealant on frames
- Rushed sealant from a window installation
- Cracked or shrunken mastic around the frame
How we handle window mastic in Hoy
Around Hoy we seal all kinds of frames: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. Common call-outs are for gaps left after new windows were fitted and leaking joints at the ends of sills, on patio & French doors, composite doors and uPVC windows.
Mastic can only go onto a dry joint, so outside work in Hoy depends on the weather. Let us know about access to every frame, including any upstairs.
You are covered for a year from the day we finish. If there’s a problem with it, please send an email to info@mrmastic.co.uk.
- Place
- Hoy (KW16)
- Region
- Orkney Islands
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Other services in Hoy
Common questions in Hoy
Is window mastic in a coastal place like Hoy any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Can you do window mastic in Hoy?
Yes, Hoy is within the area we cover. Our work covers the whole of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job, and we will send you a clear quote.
What does window mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, send an email to info@mrmastic.co.uk and let us know what needs doing and where.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
How many windows can you do in a day?
The work takes a few hours for a handful of frames, longer for a whole house. Access and how stubborn the old mastic is affect the time most.
Does the work come with a guarantee?
Yes, with our one-year guarantee. Keeping drainage clear and checking the joints yearly helps them last.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Surface by surface
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Repaint timber before it’s bare
- Walk round the house once a year and look at the joints
- Don’t aim a pressure washer at the joints
- Use gentle cleaners on frames and sealant
Most silicone sealants won’t take paint, so mention any painting plans before we start. There are paintable sealants for joints that need it.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. Resealing closes it.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Damp problems in the wall away from the window
- Condensation trapped between the panes
- Faulty window hardware
If you are not sure, just drop us a line at info@mrmastic.co.uk and we will give you a straight answer.
Where we work in Hoy
- Window sills
- Timber windows & doors
- Patio & French doors
- Aluminium frames
- Composite doors
- uPVC windows
Window mastic in Hoy: local notes
Hoy is close to 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. On the islands, wind and salt spray are hard on outside sealant.
For jobs in and around Hoy, choosing the right material for each joint is as important as a tidy finish.
Hoy is about 14 miles west of Kirkwall, in the Orkney Islands. Jobs in Hoy get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our the Orkney Islands coverage runs to 51 places, and Hoy is one of them.
Postcode districts we cover here for window mastic: KW16. Hoy sits on or near the B9049. Neighbouring places we cover for window mastic include Stromness (4 miles north), Cairston (5 miles north), Clestrain (5 miles north-east), Midland (5 miles east) and Clouston (6 miles north-east). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Near you in Hoy
Nearby you will also find Stromness Museum (3.3 miles north). Not far away are Round Hill and South Dam.
The process
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. It normally takes a few hours for a few frames, or a day or more for a whole house. Outside jobs in Hoy 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 is not affected.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Mention any parking rules near the property
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
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What affects the cost of window mastic
The quote reflects the job in front of us. We take into account:
- The type of sealant required
- When we can work, for business premises
- The number of rooms or windows
- Whether there’s mould to deal with
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Helping us quote
When you contact us, these details help:
- How we’d reach the joints
- The problem you’ve noticed
- Roughly how big the job is
- If someone has resealed it before
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, drop us a line at info@mrmastic.co.uk.
Do you need window mastic in Hoy?
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Common reasons people contact us include:
- Untidy mastic left by window fitters
- Hard, cracked sealant around windows
- Draughty joints inside around the window
- Gaps where the sill meets the wall
In and around Hoy, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- Whether the sealant suits the joint
- Is the old sealant removed completely?
- How the colour is chosen
- How the joint is cleaned and prepared