Falkirk · Scotland
Sand mastic for sash & case windows in Larbert, Falkirk
Problem with your window and door surrounds in Larbert? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Draughts and rain around sash boxes
- Gaps where the frame meets the masonry
- Cement or filler used on old window joints that has cracked
Looking after it afterwards
Looking after new joints is easy:
- Keep modern sealant off the mastic
- Find out about consent before window work on a listed home
- Take care around the mastic when scraping paint
- Check the mastic when you check the paintwork
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
About our sand mastic in Larbert
A silicone bead around a sash window can look out of place and isn’t always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on sash and case windows, tenement windows and period & listed homes, and the jobs we see most are failed mastic on an exposed elevation and a silicone bead on a sash window that spoils the look.
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.
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
- Larbert (FK5, FK2)
- Region
- Falkirk
- Cover
- One year on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
The process
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours per window, depending on the condition of the joints. Somewhere like Larbert may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Let us know about parking restrictions
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
Getting a quote
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand.
Advice
What sand mastic looks like in Larbert
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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Homes close to Tryst Church and Hall include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as Kinnaird Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Larbert is about 2 miles north-west of Falkirk, in Falkirk. We provide sand mastic to homeowners, landlords and businesses in Larbert. Larbert is one of 50 towns and villages in Falkirk we cover for sand mastic. Our Glasgow page covers work nearby, about 21 miles away.
We work across FK5 and FK2 for sand mastic and the streets around it. That includes homes and businesses on Main Street, Marion Wilson View and Muirhall Road. With the B905 close by, Larbert is simple for us to get to for sand mastic. We also cover the places around Larbert: Stenhousemuir (1 mile east), Torwood (2 miles north-west), Camelon (2 miles south), Bonnybridge (3 miles south-west) and Plean (3 miles north-west). Within a short drive, we also cover Grangemouth (4 miles east), Bo'ness (9 miles east), Denny (3 miles west), Polmont (5 miles south-east), Brightons (5 miles south-east) and Kinneil (8 miles east). Larbert is one of the larger places we cover in Falkirk.
Local landmarks in Larbert
Locally, jobs take us to homes and businesses close to Falkirk High School and the streets around them. There’s a railway station in Larbert itself: Larbert station. Other landmarks nearby include Royal Scottish National Hospital (less than half a mile north-west) and Callendar House (3.3 miles south-east). Open spaces near Larbert include Callendar Lake.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured for the work.
Signs you need sand mastic in Larbert
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Keep an eye out for any of the following:
- Wind and rain getting in round a sash window
- Mastic round period door frames that has failed
- Modern sealant on a period surround
- Old sand mastic that has cracked, crumbled or fallen out
Rented homes near Larbert station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- What insurance they hold
- How the colour is chosen
- Is the old sealant removed completely?
- What preparation is included
FAQs for Larbert
Is Larbert within the area you cover?
Yes. Larbert is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Larbert for sand mastic?
Yes, Larbert is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
Can I choose the sealant colour?
Usually, yes. White, clear and grey are common, and other colours are available, and we will agree it with you first.
Where is Mr Mastic based?
We are based in Crawley, and we work across South East England, London and Scotland.
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.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Do you work for landlords and businesses?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
Nearby places to Larbert
What else we do in Larbert
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Decayed frames that need repair
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think before you book.
Surfaces we seal
- Period & listed homes
- Sash and case windows
- Brick reveals
- Timber door frames
- Tenement windows
- Stone surrounds
Should I try it myself first?
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 fails, we can still redo it.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Why deal with it now?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. 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.
Doing several joints on one visit is generally more efficient than separate visits. You will get one clear quote for the whole job.
Why us?
- Every job guaranteed for a year
- Fully insured
- Arbo and Everbuild products
- Tidy, careful work
Take a look at what affects the cost or our reviews.