Na h-Eileanan Siar · Scotland
Window & door mastic in Sandwick, Na h-Eileanan Siar
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Sandwick. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Leaking joints at the ends of sills
- Mastic that’s falling out in pieces
- Draughts coming in around windows and doors
Window mastic in Sandwick, done properly
Around Sandwick 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 between the frame and the inside reveal and old mastic that has gone black or come away, on timber windows & doors, composite doors and patio & French doors.
Outdoor sealant needs a dry surface, so window work around Sandwick is planned around the weather. Let us know about access to every frame, including any upstairs.
You get a 12-month guarantee, the same in Sandwick as everywhere else we work.
- Where
- Sandwick (HS1, HS2)
- Region
- Na h-Eileanan Siar
- Cover
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
When to call us in Sandwick
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Look out for any of the following:
- Hard, cracked sealant around windows
- Cold air getting in at the frame edge
- White mastic on grey or black frames
- Gaps left after new windows were fitted
Around Sandwick, as everywhere, window mastic is only as good as the preparation behind it.
Before you book anyone
- How hidden problems are handled
- Whether they seal over old material or remove it
- What insurance they hold
- What guarantee comes with the work
Different surfaces, different methods
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We seal the frame and let you know about anything else.
Why act early in Sandwick
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
What it costs depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before any work starts.
Why book with us
- Full insurance on every job
- We agree the colour with you first
- More than 20 years in sealant work
- Homes, businesses and hotels
Take a look at how sealant jobs are priced or what customers say.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Look round the frames every year or so
- Avoid blasting the frames with a pressure washer
- Wash the frames with mild soapy water
- Do not use solvent cleaners on the joint
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
Towns and villages near Sandwick
Also in Sandwick
Window mastic in Sandwick: local notes
Sandwick 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. The west of Scotland is wetter than the east, which means the mastic around window and door frames has to cope with a lot of rain.
For an older house near a landmark such as Stornoway High Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Sandwick is about 1 mile south-east of Stornoway, in Na h-Eileanan Siar. Whether you’re in the middle of Sandwick or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Sandwick is one of 87 towns and villages in Na h-Eileanan Siar where we work.
Here we cover the HS1 and HS2 postcode area for window mastic. We cover properties on Stoneyfield, East Street and Olivers Brae and the roads around them. Other places close to Sandwick include Plasterfield (1 mile north), Sanndabhaig (1 mile east), Steinis (1 mile north), Stornoway (1 mile north-west) and Branahuie (1 mile east). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
What’s near Sandwick
Other landmarks nearby include Western Isles Hospital (1.5 miles north-west) and Lewis Loom Centre (1.3 miles west). For a walk, there’s Loch Àirigh na Lic.
Sandwick: your questions answered
Do you cover smaller places like Sandwick?
Yes. Sandwick 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. Let us know about access, parking and anything unusual about getting there when you book.
Is Sandwick in your area for window mastic?
Yes, Sandwick is within the area we cover. We work across all 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.
Is the new sealant paintable?
Silicone generally won’t take paint. Let us know beforehand, and we’ll use a paintable product where it suits.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
How long does it take to reseal the windows on a house?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and the amount of old mastic make the biggest difference.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Quotes for window mastic in Sandwick
Some jobs are bigger than they look, and some smaller. The main factors:
- The number and length of the joints
- Mould in or behind the old joints
- Access and height
- The old material and how stubborn it is
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please drop us a line at info@mrmastic.co.uk.
What to tell us for a quote
When you call or email, it’s useful to know:
- Photos by email, if that’s easy
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- The rough size of the job
We quote each job on its own, so start by telling us what you need. Simply email us at info@mrmastic.co.uk and describe the job.
What we do, step by step
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the work takes a morning for a couple of windows and a door in most cases. For a place like Sandwick, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Let us know about parking restrictions
- Clear the area around the work
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job.