Na h-Eileanan Siar · Scotland
Window Mastic in Sanndabhaig
Window mastic for Sanndabhaig, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Draughty joints inside around the window
- Old mastic that has gone black or come away
- Whistling draughts around closed windows
Your questions about window mastic in Sanndabhaig
Does living near the coast affect window mastic in Sanndabhaig?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Can you do window mastic in Sanndabhaig?
Yes, Sanndabhaig 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.
What does window mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, email us at info@mrmastic.co.uk and let us know what needs doing and where.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Do you seal inside as well as outside?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
Window mastic in Sanndabhaig
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that cannot move properly, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We work on uPVC windows, aluminium frames and timber windows & doors, and common reasons people get in touch are a bead that doesn’t match the frame and mastic that has split away from the wall.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Sanndabhaig (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What affects the cost of window mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
- How easy the joints are to reach
- The product the joint needs
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
Helping us quote
To help us quote quickly, please include:
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
To get a quote, drop us a line at info@mrmastic.co.uk with the location and a short description of the problem. You’ll have a clear quote before work begins.
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Don’t paint over the silicone
- Look round the frames every year or so
- Use gentle cleaners on frames and sealant
- Air rooms to keep condensation down around windows
Try not to touch the new joint while it cures, following the cure time we give you. Do not point a pressure washer at the joints.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
What sealant work can’t fix
It helps to know what we can’t do:
- Damp problems in the wall away from the window
- Condensation trapped between the panes
- A door that needs adjusting, rehanging or new seals
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think before you book.
What we seal
- Window sills
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Composite doors
- uPVC windows
Sanndabhaig homes and the weather
Sanndabhaig is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around window and door frames, especially on the side facing the sea. 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 jobs in and around Sanndabhaig, choosing the right material for each joint is as important as a tidy finish.
Sanndabhaig (Gaelic: Sandwick) is in Na h-Eileanan Siar. Across the HS2 area, we can carry out window mastic at your property. Our Na h-Eileanan Siar coverage runs to 87 places, and Sanndabhaig is one of them.
We work across HS2 for window mastic and the streets around it. Whether your property is on Mackenzie Park, MacKenzie Lane and Mackenzie Avenue or a nearby road, our applicators can take on the job. If you’re just outside Sanndabhaig, we cover Sandwick (1 mile west), Plasterfield (1 mile north-west), Branahuie (1 mile east), Steinis (1 mile north) and Bràigh na h-Aoidhe (1 mile east). Being one of Na h-Eileanan Siar’s larger places, Sanndabhaig has homes, rented property and businesses of every kind. For island and remote addresses, the job takes a little more planning.
Around Sanndabhaig
Nearby you will also find Western Isles Hospital (1.9 miles north-west) and Lewis Loom Centre (1.8 miles west). Green spaces nearby include Loch Àirigh na Lic.
Nearby places to Sanndabhaig
What else we do in Sanndabhaig
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Signs you need window mastic in Sanndabhaig
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, and a gap filled solid cannot flex. Backing rod sets the right depth.
Any of these means the joints need attention:
- Cracked or shrunken mastic around the frame
- Black, perished sealant on frames
- Sealant in the wrong colour for the frame
- Cold air getting in at the frame edge
In and around Sanndabhaig, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- What happens if the job turns out different
- Whether they seal over old material or remove it
- Who turns up on the day
- Is VAT in the price?
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from an hour or two to a full day, depending on how many frames there are, including the tidy-up. Somewhere like Sanndabhaig may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
- Clear items away from the joints we are working on
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Read more
What the job involves on each surface
Window sills
Stone and concrete sills have their own joints, and the joint under the frame can let rain run behind. Those are sealed with a product suited to stone or concrete.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.