Shetland Islands · Scotland
Sand mastic for sash & case windows in Hamnavoe, Shetland Islands
Sand mastic in Hamnavoe from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
- Modern sealant on a period surround
When it isn’t the sealant
New sealant can’t fix everything, and we’d rather say so up front. Sealant will not put right:
- Sash cords, weights and draught-proofing of the sashes
- Planning or listed building consent (your local planning authority decides)
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly.
Where we work in Hamnavoe
- Timber door frames
- Period & listed homes
- Brick reveals
- Sash and case windows
- Tenement windows
- Stone surrounds
How we handle sand mastic in Hamnavoe
Sand mastic suits most period window surrounds. Newer frames normally get a flexible sealant instead, and we will talk through which suits your home. We are often asked to deal with tired mastic found when preparing windows for paint and old cement repairs round a window that have failed, on brick reveals, tenement windows and stone surrounds.
Outdoor sealant needs a dry surface, so window work around Hamnavoe is planned around the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
All our work comes with a 12-month guarantee, wherever you are in the Shetland Islands.
- Location
- Hamnavoe (ZE2)
- Wider area
- Shetland Islands
- Cover
- One year on every job
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Why deal with it now?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why Hamnavoe customers choose us
- 180+ five-star Google reviews
- Anti-fungal sanitary silicone in wet areas
- Quality sealants from Arbo and Everbuild
- We leave the area clean and tidy
Read our cost guide or our reviews.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Towns and villages near Hamnavoe
Other services in Hamnavoe
FAQs for Hamnavoe
Do you cover Hamnavoe for sand mastic?
Yes, Hamnavoe is within the area we cover. We work across all of Scotland. You can email us at info@mrmastic.co.uk and tell us what needs doing.
Does the coastal weather in Hamnavoe affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours for many products, and we’ll agree it with you first.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so the joint is cleaned back first.
Can new sealant go over the old?
No. The old sealant always comes out first.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
Sand mastic in Hamnavoe: local notes
Hamnavoe is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
Whether the job is in Hamnavoe itself or nearby, the right material for each joint matters as much as a neat finish.
Hamnavoe is in the Shetland Islands. Hamnavoe gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 63 places across the Shetland Islands.
Work in ZE2 is quoted and booked the same way as anywhere else. That includes homes and businesses on Glenburn Road, Atlaness and Gudda Taing. If you’re just outside Hamnavoe, we cover Toogs (1 mile south), Scalloway (3 miles north-east), Gulberwick (5 miles east), Cunningsburgh (5 miles south-east) and Bremirehoull (6 miles south-east). Larger places within reach include Lerwick (7 miles north-east), Sound (6 miles north-east) and Sandwick (8 miles south-east). Hamnavoe is one of the larger places we cover in the Shetland Islands. Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Near you in Hamnavoe
A little further out are Scalloway Museum (3.5 miles north-east). Not far away are West Loch and Hill of Berry.
What affects the cost of sand mastic
We quote each job individually. This is what makes a difference:
- Whether the work is at height
- When we can work, for business premises
- How many rooms, windows or areas are involved
- Any mould that needs treating
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What we need to know
What to tell us when you ask for a quote:
- Whether it’s a home or a business
- A few pictures by email, if you can
- The problem you’ve noticed
- If someone has resealed it before
Asking for a quote is easy: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand.
DIY sealant or a professional job?
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. Everything old must be removed first.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take anything from a few hours to a full day, depending on how many windows. For a place like Hamnavoe, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
Getting a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved.
Read more
Do you need sand mastic in Hamnavoe?
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
Common reasons people contact us include:
- Cement or filler used on old window joints that has cracked
- Crumbling sand mastic round a window
- Gaps round a timber door in stone or brick
- Failed mastic on an exposed elevation
Around Hamnavoe, as everywhere, sand mastic is only as good as the preparation behind it.
Questions to ask before you book
- What the cure time is
- Is VAT in the price?
- Who turns up on the day
- How the joint is cleaned and prepared