Na h-Eileanan Siar · Scotland
Shawbost Window Mastic
Window and door frames in Shawbost need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Draughts coming in around windows and doors
- Gaps where the sill meets the wall
- White mastic on grey or black frames
How the job changes by surface
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
About our window mastic in Shawbost
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. If you have black, perished sealant on frames and draughts coming in around windows and doors, we can put it right, whatever the surface.
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.
All of our work is guaranteed for twelve months.
- Location
- Shawbost (HS2)
- Region
- Na h-Eileanan Siar
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Why deal with it now?
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. 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.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Why book with us
- Rated 4.9 stars on Google
- We never seal over old sealant
- White, clear, grey or coloured to suit, where the product allows
- Sealant colour chosen to suit
Take a look at what affects the cost and what customers say.
Common problems we fix in Shawbost
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
Signs it’s time to call us include:
- Cold air getting in at the frame edge
- Gaps left after new windows were fitted
- Gaps where the sill meets the wall
- Damp patches on the reveal after heavy rain
In and around Shawbost, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- How much experience the applicator has
- The length of the guarantee
- What the cure time is
- How hidden problems are handled
Honest limits
In fairness, some problems need a different trade:
- Worn gaskets, brush seals or a door that has dropped
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Soft or decayed wood in the frame
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer before booking.
Where we work in Shawbost
- Window sills
- uPVC windows
- Patio & French doors
- Aluminium frames
- Composite doors
- Timber windows & doors
Landlord and commercial work in Shawbost
Landlords and agents in Shawbost can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Nearby places to Shawbost
Other services in Shawbost
Frames and glazing around Shawbost
Shawbost is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. 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, so there’s plenty of rain for the mastic around window and door frames to keep out.
For jobs in and around Shawbost, choosing the right material for each joint is as important as a tidy finish.
Shawbost (Gaelic: Siabost) is in Na h-Eileanan Siar. Whether you’re in the middle of Shawbost or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Shawbost is one of 87 towns and villages in Na h-Eileanan Siar we cover.
Work in HS2 works the same way as everywhere else we cover. If you need window mastic at a property on Rathad Ghrinnibhat, Cnoc a Charnain and Sraid na H-Eaglaise or anywhere close by, our applicators can take on the job. We also cover Bragar (2 miles north-east), Na Gearrannan (4 miles south-west), Carloway (4 miles south-west), Barabhas (7 miles east) and West Side (7 miles east). For island and remote addresses, a little more planning is needed, so mention it when you ask for a quote.
Around Shawbost
Other landmarks nearby include Shawbost Folk Museum (0.7 miles north-east). For a walk, there’s Loch a' Bhaile.
Questions from Shawbost
Can you do window mastic in Shawbost?
Yes, Shawbost is within the area we cover. Our work covers the whole of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job, and we’ll send you a clear quote.
Is window mastic in a coastal place like Shawbost any different?
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 work on first-floor windows?
Usually, yes. Access is planned before any work starts, so mention the height and anything in the way.
How long does it take to reseal the windows on a house?
A handful of frames is a short visit, while a whole house takes longer. You’ll get a timescale with the quote.
Can new window sealant be painted?
Most silicone can’t be painted. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
How do I get a quote for window mastic in Shawbost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
How to look after the new joints
After the cure time, these simple habits help:
- Keep timber frames painted
- Avoid blasting the frames with a pressure washer
- Keep solvents and bleach off the sealant
- Walk round the house once a year and look at the joints
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
How it works
When we arrive, we start by going over the job with you. Surfaces next to the work are protected before any work starts. Most jobs take a morning for a couple of windows and a door. Around Shawbost, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
Get a quote
Every job is quoted individually, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job, and photos are welcome.