Na h-Eileanan Siar · Scotland
Window & door mastic in Upper Coll, Na h-Eileanan Siar
Window mastic for Upper Coll and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Black, perished sealant on frames
- Sealant in the wrong colour for the frame
- Hard, cracked sealant around windows
How we quote for window mastic
There’s no set price list. The quote depends on:
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- The size of the job
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Helping us quote
To make quoting easier, please include:
- Photos by email, if that’s easy
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- The rough size of the job
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, send an email to info@mrmastic.co.uk.
Window mastic in Upper Coll
Around Upper Coll 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. If you’re dealing with rushed sealant from a window installation and whistling draughts around closed windows, we can put it right, on timber windows & doors, composite doors and window sills alike.
Outdoor sealant needs a dry surface, so window work around Upper Coll is planned around the weather. Let us know about access to every frame, including any upstairs.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Where
- Upper Coll (HS2)
- Region
- Na h-Eileanan Siar
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
More services for Upper Coll
Honest limits
It helps to know what we can’t do too:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think before booking.
Where we work in Upper Coll
- Patio & French doors
- uPVC windows
- Aluminium frames
- Window sills
- Timber windows & doors
- Composite doors
Landlord and commercial work in Upper Coll
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Aftercare tips
A little care helps the new joints last. We recommend:
- Keep timber frames painted
- Ventilate rooms so frames don’t stay wet inside
- Check the mastic once a year
- Keep drainage slots and sill grooves clear
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
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. If you notice one, it’s time to get the joint looked at.
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What the job involves on each surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
How it works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we have agreed what’s being done, we protect the area and start. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Around Upper Coll, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Before we arrive
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Just send an email to info@mrmastic.co.uk with the details, and pictures are welcome.
Advice
Upper Coll homes and the weather
Upper Coll 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. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Upper Coll is in the west of Scotland, which is wetter than the east, which means the mastic around window and door frames has to cope with a lot of rain.
In and around Upper Coll, as anywhere, good window mastic starts with a clean, dry, properly prepared joint. Whether the job is in Upper Coll itself or nearby, the right material for each joint matters as much as a neat finish.
Upper Coll (Gaelic: Col Uarach) is in Na h-Eileanan Siar. Wherever you are in the HS2 postcode area, we cover window mastic for homes and businesses. We cover 87 towns and villages across Na h-Eileanan Siar, from the larger towns to small villages.
Work in HS2 is quoted and booked the same way as anywhere else. If you are just outside Upper Coll, we cover Aird Tong (1 mile south), Tong (1 mile south-west), Bac (2 miles north-east), Newmarket (3 miles south-west) and Steinis (3 miles south). For island and remote addresses, a little more planning is needed, so let us know when you get in touch.
Local landmarks in Upper Coll
Well-known places in the area include Lewis Loom Centre (3.6 miles south-west) and Western Isles Hospital (3 miles south-west). For a walk, there’s Loch Àirigh na Lic.
FAQs for Upper Coll
Is Upper Coll within the area you cover?
Yes. Upper Coll 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. Let us know about access, parking and anything unusual about getting there when you book.
Does the coastal weather in Upper Coll affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
How long should I leave it?
Different products cure at different speeds, so follow the cure time we give you when we finish.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
I’m a tenant. Can you help?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Do you work for letting agents?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels across Na h-Eileanan Siar.