Na h-Eileanan Siar · Scotland
Sand Mastic in Upper Coll
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Upper Coll. Fully insured, ARBOMaster approved and guaranteed for a year.
- Modern sealant on a period surround
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
Sand mastic in Upper Coll
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. If you are dealing with gaps between timber frames and stone or brick and mastic dropping out of the joint, we can put it right, on sash and case windows, period & listed homes and tenement windows alike.
In and around a place like Upper Coll, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill, so the mastic there works hard.
Every job is covered by a 12-month guarantee.
- Place
- Upper Coll (HS2)
- Region
- Na h-Eileanan Siar
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How we quote for sand mastic
You will get a clear quote before work begins. It takes into account:
- The amount of work
- Whether old sealant or filler has to be cut out
- The product the joint needs
- Whether the work is at height
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- How we’d reach the joints
- The address or postcode of the job
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
What else we do in Upper Coll
Questions from Upper Coll
Is Upper Coll in your area for sand mastic?
Yes, Upper Coll 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.
Is Upper Coll within the area you cover?
Yes, we do. Our work covers the whole of Scotland, islands included, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
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, and we’ll explain our choice.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like but the decision is theirs.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
What sealant work cannot fix
Before you book, it’s worth knowing the limits too:
- Masonry that needs repairing
- Sash cords, weights and draught-proofing of the sashes
- Putty and glazing repairs
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer before you book.
Surfaces we seal
- Tenement windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Sash and case windows
- Timber door frames
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Keep modern sealant off the mastic
- Don’t paint over the new mastic
- Inspect the joints round the windows every year or so
- Go gently near the mastic when preparing windows
Do not run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
The process
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. The job usually takes a few hours for a single window, longer for several, and we explain the cure time before we leave. Outside jobs in Upper Coll need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors is not affected.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
How to get a quote
Every job is quoted individually. Just email us at info@mrmastic.co.uk with the details.
Advice
Common problems we fix in Upper Coll
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
Look out for any of the following:
- Mastic round period door frames that has failed
- Gaps between timber frames and stone or brick
- Weathered mastic on the most exposed windows
- Mastic dropping out of the joint
For jobs in and around Upper Coll, choosing the right material for each joint is as important as a tidy finish.
Before you book anyone
- Whether the sealant suits the joint
- What the quote includes, VAT included or not
- Are they insured?
- How the surfaces are prepared before sealing
For landlords and businesses
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
How the job changes by surface
Brick reveals
We rake out the old mastic and pack deep voids before pointing.
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
What sand mastic looks like in Upper Coll
Upper Coll is close to 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 older windows and doors, especially on the side facing the sea. On the islands, wind and salt spray are hard on outside sealant.
Around Upper Coll, as everywhere, sand mastic is only as good as the preparation behind it.
Upper Coll (Gaelic: Col Uarach) is in Na h-Eileanan Siar. For sand mastic in and around Upper Coll, it’s easy to get a quote: please drop us a line at info@mrmastic.co.uk. We cover Na h-Eileanan Siar from our Crawley base. Upper Coll is one of 87 towns and villages in Na h-Eileanan Siar we cover.
Postcode districts we cover here for sand mastic: HS2. Nearby, we also carry out sand mastic in 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). If you are somewhere remote, the job takes a little more planning.
Landmarks near Upper Coll
A little further out are Lewis Loom Centre (3.6 miles south-west) and Western Isles Hospital (3 miles south-west). The countryside around Upper Coll includes Loch Àirigh na Lic.