Shetland Islands · Scotland
Window & door mastic in Hamnavoe, Shetland Islands
Professional window mastic in and around Hamnavoe, with every bit of old sealant taken out first and a 12-month guarantee.
- Hard, cracked sealant around windows
- Gaps between the frame and the inside reveal
- Mastic that is falling out in pieces
Window mastic in Hamnavoe
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that cannot flex, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. We work on patio & French doors, composite doors and uPVC windows, and the jobs we see most are old mastic that has gone black or come away and whistling draughts around closed windows.
In and around a place like Hamnavoe, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill, so the mastic there works hard.
Every job is covered by our one-year guarantee, wherever you are in the Shetland Islands.
- Place
- Hamnavoe (ZE2)
- Region
- Shetland Islands
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
The process
At the end, we look at the finished work together. The visit itself usually takes a few hours for a handful of frames, longer for a whole house, depending on how much there is to do. Outdoor work around Hamnavoe depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Work indoors is not affected.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
Ask for a quote
For window mastic in Hamnavoe, send an email to info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Advice
What affects the cost of window mastic
The price is agreed before any work begins. It takes into account:
- Which sealant suits the joint
- Mould in or behind the old joints
- When we can work, for business premises
- The amount of work
What it costs depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Where the job is, and your postcode
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- Whether it has been sealed before
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear quote.
What happens if it’s left?
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
Why us?
- Sealant colour chosen to suit
- 180+ five-star Google reviews
- An ARBOMaster approved applicator
- Old sealant always removed completely
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Make sure the drainage slots are not blocked
- Avoid blasting the frames with a pressure washer
- Do not paint over the silicone
- Walk round the house once a year and look at the joints
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.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Work for landlords, hotels and businesses
If you manage several properties in or around Hamnavoe, several properties can go on one quote. Just tell us the addresses and what each one needs.
We also work for property managers and facilities teams in Hamnavoe and across the Shetland Islands. We can quote a run of properties together.
Common problems we fix in Hamnavoe
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Common reasons people contact us are:
- A bead that doesn’t match the frame
- Gaps where the sill meets the wall
- Gaps left after new windows were fitted
- Mastic that has split away from the wall
Around Hamnavoe, as everywhere, window mastic is only as good as the preparation behind it.
What to look for in a quote
- Whether VAT is included
- Is the old sealant removed completely?
- What product goes in the joint
- Are they insured?
Different surfaces, different methods
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. We cut it out, back any deep gaps and reseal properly.
Aluminium frames
Coated aluminium needs a compatible sealant. We use a neutral-cure product.
Nearby places to Hamnavoe
What else we do in Hamnavoe
What window mastic looks like in Hamnavoe
Hamnavoe 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. Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with 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. We provide window mastic to homes and businesses in Hamnavoe and nearby, as part of our work across the Shetland Islands. Hamnavoe is one of 63 towns and villages in the Shetland Islands where we work for window mastic.
Here we cover the ZE2 postcode area for window mastic. Whether your property is on Glenburn Road, Atlaness and Gudda Taing or anywhere close by, our applicators can take on the job. We also cover the places around Hamnavoe: Toogs (1 mile south), Scalloway (3 miles north-east), Gulberwick (5 miles east), Cunningsburgh (5 miles south-east) and Bremirehoull (6 miles south-east). Further out, we also cover Lerwick (7 miles north-east), Sound (6 miles north-east) and Sandwick (8 miles south-east). As one of the bigger places in the Shetland Islands, Hamnavoe has homes, rented property and businesses of every kind. 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
Nearby you’ll also find Scalloway Museum (3.5 miles north-east). Green spaces nearby include West Loch and Hill of Berry.
Questions from Hamnavoe
Do you cover Hamnavoe for window mastic?
Yes, Hamnavoe is within the area we cover. We work across all of Scotland. You can send an email to info@mrmastic.co.uk and let us know what needs doing, and we will give you a clear price.
Will you come out to Hamnavoe?
Yes. Hamnavoe is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland, including the islands, where work is planned around ferry crossings. Just mention lanes, gates or anything else about the route when you book.
Can you get sealant to suit coloured frames?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Can you do the inside joint as well?
Yes. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.