Renfrewshire · Scotland
Sand mastic for sash & case windows in Crosslee, Renfrewshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Crosslee. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Weathered mastic on the most exposed windows
- Crumbling sand mastic round a window
- Mastic round period door frames that has failed
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Inspect the joints round the windows every year or so
- Leave the new mastic unpainted
- Keep modern sealant off the mastic
- Ask a joiner to look at soft timber first
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
Sand mastic in Crosslee, done properly
Across Crosslee, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand for a neat, traditional finish. If you are dealing with modern sealant on a period surround and mastic worn away on windows facing the weather, we can help.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
You get a 12-month guarantee, the same in Crosslee as everywhere else we work.
- Where
- Crosslee (PA6)
- Region
- Renfrewshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
For anyone letting property in or around Crosslee, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Places near Crosslee
More services for Crosslee
Windows and doors in Crosslee
Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Crosslee is in the west of Scotland, which is wetter than the east, so there’s plenty of rain for the mastic around older windows and doors to keep out.
For an older house near a landmark such as St Fillan's R.C. Church and School, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For site and facilities teams at buildings such as Gryffe High School, larger buildings have plenty of frames, and the mastic around each one ages.
Crosslee is about 2 miles north-west of Johnstone, in Renfrewshire. Across the PA6 area, we can carry out sand mastic at your property. Crosslee is one of 21 towns and villages in Renfrewshire we cover for sand mastic. Glasgow is on our list too, about 10 miles from Crosslee.
Every address in PA6 is covered for sand mastic. Local streets include Crosslee Gardens, Brierie-Hill Road and Brierie Avenue, and we cover them all. If you’re just outside Crosslee, we cover Houston (1 mile north-west), Craigends (1 mile east), Brookfield (1 mile south-east), Bridge of Weir (1 mile west) and Ranfurly (2 miles south-west). Larger places within reach include Paisley (5 miles east), Renfrew (6 miles east), Erskine (4 miles north-east), Bishopton (3 miles north-east), Glenburn (5 miles south-east) and Charleston (5 miles east).
Landmarks near Crosslee
Around Crosslee, our work takes us to homes and buildings near Linwood High School and Fox and Hounds Inn and the streets around them. Crosslee’s nearest station is Johnstone station, about 2.4 miles south-east. Well-known places in the area include Weaver's Cottage (1.7 miles south) and Merchiston Hospital (1.4 miles south-east). The countryside around Crosslee includes Walls Hill and Whitemoss Dam.
Surface by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Quotes for sand mastic in Crosslee
For a quick quote, just ask. What matters most is:
- Working hours on commercial sites
- How much there is to do
- The type of sealant required
- How easy the joints are to reach
The cost depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- If someone has resealed it before
- Photos by email, if that is easy
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, email us at info@mrmastic.co.uk.
Do you need sand mastic in Crosslee?
Shallow joints are a common cause. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Look out for any of the following:
- Patchy fillers round a sash window
- Mastic dropping out of the joint
- Gaps between timber frames and stone or brick
- A silicone bead on a sash window that spoils the look
Letting a property close to Johnstone station? Then any sash windows need sound mastic to keep draughts and rain out.
What your quote should include
- What happens if they find a problem under the old sealant
- Whether the sealant suits the joint
- What guarantee comes with the work
- Who turns up on the day
Crosslee questions
Can you do sand mastic in Crosslee?
Yes, Crosslee is within the area we cover. Our work covers the whole of Scotland. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear price.
Do you cover smaller places like Crosslee?
Yes, Crosslee is covered. We work across all of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will talk you through it.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Is sand mastic better than silicone for my windows?
We’ll talk it through with you. Sand mastic suits many period homes and newer frames suit modern sealant.
How it works
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a few hours per window, depending on the condition of the joints from start to finish. Somewhere like Crosslee may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Mention any tricky access
- Try not to wet indoor joints just before the visit
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Related advice
What happens if it’s left?
If you are redecorating, renew the mastic first. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why Crosslee clients choose us
- Quality sealants from Arbo and Everbuild
- Fully insured
- We never seal over old sealant
- An ARBOMaster approved applicator
Take a look at how sealant jobs are priced and our reviews.