Shetland Islands · Scotland
Window Mastic in Gulberwick
Window mastic in Gulberwick from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
- Rushed sealant from a window installation
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Window mastic in Gulberwick
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and we give a one-year guarantee on the work. If you have rain getting in at the frame or under the sill and mastic that’s falling out in pieces, we can help.
Mastic can only go onto a dry joint, so outside work in Gulberwick depends on the weather. Let us know about access to every frame, including any upstairs.
Big or small, you get the same 12-month guarantee.
- Location
- Gulberwick (ZE2)
- Region
- Shetland Islands
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Different surfaces, different methods
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain can’t run into the wall.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Air rooms to keep condensation down around windows
- Keep jet washers away from the mastic
- Keep paint and stain on wooden frames in good order
- Clean frames with a soft cloth and soapy water
Silicone cannot normally be painted, so if you are planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
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.
Frames and glazing around Gulberwick
Gulberwick 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. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
In and around Gulberwick, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Gulberwick is in the Shetland Islands. Wherever you are in the ZE2 postcode area, we cover window mastic for homes and businesses. Gulberwick is one of 63 places in the Shetland Islands we cover.
Postcode districts we cover here for window mastic: ZE2. You will find streets such as Hillside Brae, Hillside Park and Lower Hillside, all of which we cover. Other places close to Gulberwick include Sound (2 miles north-east), Scalloway (2 miles west), Lerwick (3 miles north-east), Gremista (3 miles north-east) and Grindiscol (4 miles east). As one of the bigger places in the Shetland Islands, Gulberwick has every kind of property, from flats to offices. For island and remote addresses, a little more planning is needed.
Local landmarks in Gulberwick
Other landmarks nearby include Scalloway Museum (2.5 miles north-west) and Gilbert Bain Hospital (2.5 miles north-east). Not far away are Hill of Berry and Flossy Loch.
Also near Gulberwick
What else we do in Gulberwick
Leave it or put it right?
Resealing frames is a short job: the visit takes a few hours for a few frames, or a day or more for a whole house. Leave it until water is coming in and you may need plastering and decorating as well. In an older home around Gulberwick, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
Why Gulberwick customers choose us
- Anti-fungal silicone where joints get wet
- Quality sealants from Arbo and Everbuild
- We’re fully insured
- We never seal over old sealant
Read our cost guide or what customers say.
The process
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the job takes most of a day for a typical house, less for a few frames in most cases. In smaller Scottish places, parking is usually less of an issue than access and distance. Let us know how to find you and how to reach the joints.
- We start by checking each window and door with you.
- The old mastic is cut out and the surfaces cleaned back.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Before we arrive
- Let us know about earlier repairs to the joints
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
Get a quote
We do not publish a price list. Instead, your job gets its own clear quote. To get started, drop us a line at info@mrmastic.co.uk.
Related advice
When to call us in Gulberwick
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Look out for these signs:
- Hard, cracked sealant around windows
- Sealant in the wrong colour for the frame
- Old mastic that has gone black or come away
- Gaps left after new windows were fitted
Homes close to Gulberwick Mission Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- How hidden problems are handled
- When the joint can take water or movement
- Is VAT in the price?
- Whether you can choose the colour
Honest limits
We’ll always be straight with you, so here’s what sealant can’t fix:
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Faulty window hardware
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think before you book.
Where we work in Gulberwick
- Aluminium frames
- Window sills
- Patio & French doors
- Composite doors
- Timber windows & doors
- uPVC windows
Questions from Gulberwick
Will you come out to Gulberwick?
Yes, we do. Our work covers the whole of Scotland, islands included, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you cover Gulberwick for window mastic?
Yes, Gulberwick is within the area we cover. Our work covers the whole of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we’ll give you a clear quote.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. We’ll tell you how long your job needs when we quote.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will explain our choice.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Will there be a smell?
It depends on the product. Some smell for a while, some hardly at all.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you work for landlords and businesses?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels in Gulberwick.