South Lanarkshire · Scotland
Lanark Window Mastic
Window mastic for Lanark, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Gaps left after new windows were fitted
- Gaps between the frame and the inside reveal
- Cold air getting in at the frame edge
About our window mastic in Lanark
The new joint doesn’t have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. If you have rushed sealant from a window installation and draughty joints inside around the window, we can put it right.
Outdoor sealant needs a dry surface, so window work around Lanark is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
There’s a 12-month guarantee on every job, large or small.
- Place
- Lanark (ML11)
- Region
- South Lanarkshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. It normally takes most of a day for a typical house, less for a few frames. For a place like Lanark, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- 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.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
How to prepare
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
How to get a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, send an email to info@mrmastic.co.uk.
Advice
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
What we’re called out for in Lanark
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
Most people get in touch after spotting something like this:
- Water coming in at the bottom corners of a door
- White mastic on grey or black frames
- Black, perished sealant on frames
- Gaps left after new windows were fitted
Schools such as Lanark Grammar School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- How the colour is chosen
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- Is VAT in the price?
What window mastic looks like in Lanark
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
Letting a property close to Lanark station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Lanark is about 9 miles south-east of Wishaw, in South Lanarkshire. From the centre of Lanark to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our South Lanarkshire coverage runs to 139 places, and Lanark is one of them. There’s also a page for Glasgow, roughly 23 miles from Lanark.
Every address in ML11 is covered for window mastic, from the main roads to the quietest streets. If you need window mastic at a property on High Street, Kildare Road and Kildare Place or a nearby road, we can help. Main roads around Lanark include the A72 and A73. Other places close to Lanark include New Lanark (1 mile south), Kirkfieldbank (1 mile west), Cleghorn (2 miles north-east), Nemphlar (2 miles west) and Cartland (2 miles north-west). Further out, we also cover Hamilton (13 miles north-west), Blantyre (15 miles north-west), Larkhall (9 miles north-west), Carluke (5 miles north-west), Strathaven (11 miles west) and Bothwell (15 miles north-west). Lanark is one of the larger places we cover in South Lanarkshire.
Near you in Lanark
Locally, jobs take us to homes and businesses close to Delves Park and Maisies pub and the streets around them. There’s a railway station in Lanark itself: Lanark station. Well-known places in the area include Royal Burgh of Lanark Museum (under half a mile west) and Lanark Castle (0.5 miles south-west). Green spaces nearby include Lanark Loch and Black Hill.
Landlords, agents and businesses in Lanark
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Towns and villages near Lanark
Other services in Lanark
Why deal with it now?
If you’re painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished. Around Lanark, water from a failed joint in an older stone home can soak into timber and plaster.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please drop us a line at info@mrmastic.co.uk and we’ll talk you through it.
Why Lanark clients choose us
- Old sealant always removed completely
- Every job guaranteed for a year
- An ARBOMaster approved applicator
- Anti-fungal sanitary silicone in wet areas
Read our cost guide or our reviews.
Quotes for window mastic in Lanark
There’s no set price list. What we look at:
- Working hours on commercial sites
- The size of the job
- How many rooms, windows or areas are involved
- Which sealant suits the joint
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Where the property is
- The problem you’ve noticed
- Photos by email, if that’s easy
- Any access issues, like height or stairs
If you’re in Lanark and need window mastic, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and you will get a clear quote before we start.
Your questions about window mastic in Lanark
Is Lanark in your area for window mastic?
Yes, Lanark 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 tell us what needs doing, and we will send you a clear quote.
Do you cover smaller places like Lanark?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. Then drop us a line at info@mrmastic.co.uk.
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 will explain our choice.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us.
Will resealing my frames help with draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What the job involves on each surface
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall and tooled smooth.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.