Shetland Islands · Scotland
Hamister Window Mastic
Mastic around window and door frames, sills and patio doors in Hamister, with a one-year guarantee on every job. Ask us for a quote.
- Mastic that has split away from the wall
- Black, perished sealant on frames
- Rain getting in at the frame or under the sill
How we handle window mastic in Hamister
Around Hamister we seal all kinds of frames: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. Common call-outs are for cracked sealant at the sill ends and gaps between the frame and the inside reveal, on window sills, timber windows & doors and composite doors.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
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
- Hamister (ZE2)
- Wider area
- Shetland Islands
- Guarantee
- One year on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Landlord and commercial work in Hamister
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Other services in Hamister
Hamister: your questions answered
Does living near the coast affect window mastic in Hamister?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you cover smaller places like Hamister?
Yes, Hamister is covered. We work across all of Scotland, islands included, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit.
Is the new sealant paintable?
Silicone generally will not take paint. Let us know beforehand, and we will use a paintable product where it suits.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How many windows can you do in a day?
The work takes most of a day for a typical house, less for a few frames. Access and the amount of old mastic make the biggest difference.
What does window mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Will resealing my frames help with draughts?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Soft or decayed wood in the frame
- A sash or casement that will not close properly
- Damp problems in the wall away from the window
If you are not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before you book.
What we seal
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Window sills
- uPVC windows
- Composite doors
Do you need window mastic in Hamister?
Sun, frost and rain wear sealant out. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
These are the problems we’re asked about most:
- Water coming in at the bottom corners of a door
- Mastic that is falling out in pieces
- Rushed sealant from a window installation
- Draughts coming in around windows and doors
Around Hamister, as everywhere, window mastic is only as good as the preparation behind it.
Comparing quotes
- How much experience the applicator has
- What insurance they hold
- Whether VAT is included
- The length of the guarantee
How to look after the new joints
To keep the joints looking good and working properly:
- Do not aim a pressure washer at the joints
- Avoid harsh chemicals near the mastic
- Wipe condensation off the frames
- Look round the frames every year or so
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
What happens if it’s left?
The work is quick compared with the damage it prevents: the visit takes a few hours for a few frames, or a day or more for a whole house. Wait for damp to appear and there may be plaster and decorating to sort out too. Around Hamister, 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.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why Hamister clients choose us
- Tidy, careful work
- A choice of colours where the product allows
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
See what affects the cost and our reviews.
Window mastic in Hamister: local notes
Hamister 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. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
Whether the job is in Hamister itself or nearby, the right material for each joint matters as much as a neat finish.
Hamister is in the Shetland Islands. Homes, rented property, offices and hotels in Hamister is covered for window mastic, old or new, large or small. Every job comes with our one-year guarantee. Hamister is one of 63 towns and villages in the Shetland Islands we cover for window mastic.
Here we cover the ZE2 postcode area for window mastic. Local streets include Norrendal and North Park, and we cover them all. Neighbouring places we cover for window mastic include Symbister (1 mile south), Tripwell (1 mile north-east), Sandwick (1 mile south), Clate (1 mile south) and Brough (1 mile north-east). Further out, we also cover Lerwick (15 miles south), Sound (15 miles south) and Brae (12 miles west). For island and remote addresses, a little more planning is needed, so let us know when you get in touch.
Local landmarks in Hamister
Not far away are Setter Hill and Little Water.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
How the visit works
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes most of a day for a typical house, less for a few frames in most cases. For a place like Hamister, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- Each frame is looked over and we agree which ones need resealing.
- 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.
How to prepare
- Try not to wet indoor joints just before the visit
- Mention if the joints have been sealed before
- Tell us about any water getting in
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear price.