Na h-Eileanan Siar · Scotland
West Side Window Mastic
Mastic around window and door frames, sills and patio doors in West Side, with a 12-month guarantee on every job. Ask us for a quote.
- Cracked or shrunken mastic around the frame
- Leaking joints at the ends of sills
- Gaps left after new windows were fitted
About our window mastic in West Side
The new joint does not have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. We work on aluminium frames, timber windows & doors and window sills, and the jobs we see most are cold air getting in at the frame edge and leaking joints at the ends of sills.
In and around a place like West Side, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- West Side (HS2)
- Wider area
- Na h-Eileanan Siar
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
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.
How we quote for window mastic
We don’t publish a price list, because jobs vary so much. What we look at:
- The size of the job
- How much old sealant there is and how hard it is to remove
- Access and height
- The type of sealant required
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Where the property is
- Any previous sealing or DIY work
- The problem you’ve noticed
- Any access issues, like height or stairs
Need a quote? Please send an email to info@mrmastic.co.uk with a few details. We’ll explain what we’d do and send you a clear quote before any work starts.
How the visit works
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes most of a day for a typical house, less for a few frames. Somewhere like West Side may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- 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.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
How to get a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, email us at info@mrmastic.co.uk.
Related advice
Surface by surface
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
We work for landlords and letting agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
When it is not the sealant
We’ll always be straight with you, so here’s what sealant can’t fix:
- Soft or decayed wood in the frame
- A failed sealed unit that has misted up
- Damp coming through the wall itself rather than the frame joint
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before you book.
What we seal
- Patio & French doors
- uPVC windows
- Composite doors
- Window sills
- Aluminium frames
- Timber windows & doors
What we’re called out for in West Side
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. That is what backing rod is for.
Keep an eye out for these signs:
- Gaps where the sill meets the wall
- Sealant in the wrong colour for the frame
- Gaps between the frame and the inside reveal
- Cold air getting in at the frame edge
Around West Side, as everywhere, window mastic is only as good as the preparation behind it.
What your quote should include
- How much experience the applicator has
- Is the old sealant removed completely?
- What happens if they find a problem under the old sealant
- Whether they’re fully insured
Your questions about window mastic in West Side
Does the coastal weather in West Side affect outside sealant?
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 West Side?
Yes. West Side is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole 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.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover West Side and the rest of Na h-Eileanan Siar, along with the rest of our area.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can new sealant go over the old?
No. The old sealant always comes out first.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Can you do upstairs windows?
Yes, if safe access is possible. For high or awkward windows, we’ll tell you what access is needed.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you.
West Side homes and the weather
West Side is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Work on the islands has to be planned around ferry crossings and the weather, so the more notice, the better.
For jobs in and around West Side, choosing the right material for each joint is as important as a tidy finish.
West Side is about 11 miles north-west of Stornoway, in Na h-Eileanan Siar. For window mastic in and around West Side, it’s easy to get a quote: please send an email to info@mrmastic.co.uk. We are based in Crawley and cover Na h-Eileanan Siar, West Side included. 87 places in Na h-Eileanan Siar are on our list, from the larger towns to small villages.
Work in HS2 is quoted and booked the same way as anywhere else. You will find streets such as Gleann Mor, Heatherhill and Sraid na Loch, all of which we cover. Close by, we work in Barabhas (1 mile north-west), Bragar (4 miles west), Shader (4 miles north-east), Borgh (6 miles north-east) and Shawbost (7 miles west). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
What’s near West Side
Not far away are Loch Mòr Bharabhais and Roishal More.