Na h-Eileanan Siar · Scotland
Window Mastic in Garrabost
Window mastic across Garrabost and nearby, with old sealant always removed completely and a 12-month guarantee.
- Untidy mastic left by window fitters
- Black, perished sealant on frames
- Cracked or shrunken mastic around the frame
Your questions about window mastic in Garrabost
Will you come out to Garrabost?
Yes. Garrabost 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.
Can you do window mastic in Garrabost?
Yes. Our work covers the whole of Scotland, and Garrabost is part of that. You can send an email to info@mrmastic.co.uk and tell us what needs doing, and we’ll send you a clear quote.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Can tenants book the work?
Of course. Ask your landlord first, and we can send them the quote if that helps.
Are you fully insured?
Yes, we’re fully insured.
Where are you based?
We work from Crawley. We cover Garrabost and the rest of Na h-Eileanan Siar, along with the rest of our area.
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.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Window mastic in Garrabost
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. To get one, drop us a line at info@mrmastic.co.uk with the number of frames and any access details. We work on composite doors, window sills and aluminium frames, and common reasons people get in touch are mastic that has split away from the wall and black, perished sealant on frames.
In and around a place like Garrabost, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
All our work comes with our 12-month guarantee, wherever you are in Na h-Eileanan Siar.
- Location
- Garrabost (HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Windows and doors in Garrabost
Garrabost is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. On the islands, wind and salt spray are hard on outside sealant.
Homes close to Parish Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Garrabost is in Na h-Eileanan Siar. Jobs in Garrabost get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Garrabost is one of 87 towns and villages in Na h-Eileanan Siar where we work.
Postcode districts we cover here for window mastic: HS2. We cover properties on Graham Avenue and Claypark Road. Nearby, we also carry out window mastic in Pabail Uarach (1 mile south-east), Sulaisiadar (1 mile north-east), Lower Bayble (1 mile south), Knock (2 miles south-west) and Na h-Eileanan an Iar (2 miles south-west). If you are somewhere remote, the job takes a little more planning, so mention it when you ask for a quote.
Near you in Garrabost
A little further out are Western Isles Hospital (5.7 miles west). Green spaces nearby include Loch an Tiumpan.
Nearby places to Garrabost
More services for Garrabost
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Wash the frames with mild soapy water
- Paint up to the joint, not over it
- Don’t use solvent cleaners on the joint
- Look round the frames every year or so
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
Landlord and commercial work in Garrabost
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote.
How we quote for window mastic
You’ll get a clear quote before we start. It’s based on:
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
- Access and height
- Mould in or behind the old joints
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- How we’d reach the joints
- Pictures of the joints, sent by email
- Roughly how big the job is
- Where the property is
Every job is quoted individually. Just send an email to info@mrmastic.co.uk with the details and send photos if you have them.
Common problems we fix in Garrabost
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid can’t stretch. Backing rod sets the right depth.
The problems people normally mention when they call are:
- Untidy mastic left by window fitters
- Leaking joints at the ends of sills
- Mastic that’s falling out in pieces
- Cold air getting in at the frame edge
Around Garrabost, as everywhere, window mastic is only as good as the preparation behind it.
Questions to ask before booking
- Who turns up on the day
- What guarantee comes with the work
- Which sealant they’ll use, and why
- Which colour the sealant will be
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The process
All our tools and materials come with us in the van. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a handful of frames, longer for a whole house. In smaller Scottish places, parking is usually less of an issue than access and distance. Tell us how to find the property and how to reach the work.
- First, we confirm safe access to each frame.
- 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.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Mention any parking rules near the property
- Plan for the work area to be out of bounds to pets and children
- Mention any leaks or damp you’ve noticed
Ask for a quote
For window mastic in Garrabost, drop us a line at info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Related advice
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Condensation trapped between the panes
- Penetrating damp from a failed cavity tray or render
- Rotten timber, which needs a joiner first
Not sure which it is? You can email us at info@mrmastic.co.uk and we’ll tell you honestly before you book.
Surfaces we seal
- uPVC windows
- Timber windows & doors
- Composite doors
- Patio & French doors
- Window sills
- Aluminium frames