East Dunbartonshire · Scotland
Sand mastic for sash & case windows in Cadder, East Dunbartonshire
Sand mastic in Cadder from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Wind and rain getting in round a sash window
- Tired mastic found when preparing windows for paint
- Silicone on a period window that looks wrong
About our sand mastic in Cadder
Sand mastic doesn’t last for ever and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. We work on period & listed homes, timber door frames and sash and case windows, and common reasons people get in touch are patchy fillers round a sash window and mastic round period door frames that has failed.
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.
Each job carries a 12-month guarantee, large or small.
- Where
- Cadder (G64)
- Region
- East Dunbartonshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Windows and doors in Cadder
With historic houses such as Provand's Lordship (about 4 miles south) nearby, there’s older building stock in the area around Cadder as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
For landlords with property near Bishopbriggs station, any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near Cadder Parish Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Cadder is about 1 mile north of Bishopbriggs, in East Dunbartonshire. Anywhere in G64, we cover sand mastic for homes and businesses. 23 places in East Dunbartonshire are on our list, large and small.
Here we cover the G64 postcode area for sand mastic. We cover properties on Hilton Road, Yarrow Road and Cadder Road and the roads around them. Other places close to Cadder include Bishopbriggs (1 mile south), Balmore (1 mile north-west), Torrance (1 mile north), Bardowie (2 miles north-west) and Summerston (3 miles south-west). Larger places within reach include Kirkintilloch (3 miles east), Bearsden (4 miles west), Lenzie (3 miles east), Milngavie (4 miles west), Lennoxtown (4 miles north) and Milton of Campsie (4 miles north-east).
Landmarks near Cadder
The nearest railway station is Bishopbriggs station, about 1.1 miles south. Nearby you’ll also find Barony Chambers Museum (2.7 miles north-east) and Stobhill Hospital (1.8 miles south). For a walk, there’s Gadloch and Lenzie Moss.
When to call us in Cadder
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
Any of these means the joints need attention:
- Mastic round period door frames that has failed
- Open joints round the window box
- Draughts and rain around sash boxes
- Old sand mastic that has cracked, crumbled or fallen out
Schools such as Bishopbriggs Academy are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
What your quote should include
- What product goes in the joint
- What the cure time is
- Whether all the old sealant comes out first
- Whether you can choose the colour
The process
On the day, we look over the joints with you first, so you know exactly what we are doing. Surfaces next to the work are protected before any work begins. The work generally takes a few hours per window, depending on the condition of the joints. Outside jobs in Cadder need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors isn’t affected.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Places near Cadder
Other services in Cadder
Aftercare tips
So the new joints stay in good condition:
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
- Check with your local planning authority if your home is listed
- Ask a joiner to look at soft timber first
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
How the job changes by surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
FAQs for Cadder
Can you help a landlord with a rental near Bishopbriggs station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. You can drop us a line at info@mrmastic.co.uk with the details for a clear quote.
Is Cadder within the area you cover?
Yes. Cadder is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
How long will you be here?
Typically it takes anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer, and we’ll tell you how long to expect.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Quotes for sand mastic in Cadder
The quote reflects the job in front of us. We take into account:
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
What it costs depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
What we need to know
When you call or email, it’s useful to know:
- Access, such as stairs, a lift or height
- Photos by email, if that’s easy
- The type of property
- What’s wrong with the joints now
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Honest limits
We will always be straight with you, so here’s what sealant can’t fix:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Decisions on consent for listed homes
- Sash cords, weights and draught-proofing of the sashes
If you are not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
What we seal
- Period & listed homes
- Timber door frames
- Tenement windows
- Stone surrounds
- Brick reveals
- Sash and case windows
Landlord and commercial work in Cadder
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
If you manage several properties in or around Cadder, jobs at different addresses can go on one quote. Send us the addresses and the work at each.