Scottish Borders · Scotland
Window Mastic in Greenlaw
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Greenlaw. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracked sealant at the sill ends
- Cracked internal joints between frame and plaster
- Water coming in at the bottom corners of a door
Window mastic for homes and businesses in Greenlaw
Whether it’s one leaking patio door or every frame on the house, you’ll get a clear quote before any work starts. Just drop us a line at info@mrmastic.co.uk and tell us how many frames there are and how they’re reached. If you have leaking joints at the ends of sills and draughty joints inside around the window, 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.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Greenlaw (TD10)
- Wider area
- Scottish Borders
- Cover
- A year, on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Why act early in Greenlaw
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water behind a failed seal does the most damage when nobody’s watching.
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
Why Greenlaw clients choose us
- Fully insured
- Sealant colour chosen to suit
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
Take a look at what affects the cost or what customers say.
Places near Greenlaw
What else we do in Greenlaw
Window mastic in Greenlaw: local notes
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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Homes close to Greenlaw Parish Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Greenlaw is about 15 miles north-east of Galashiels, in the Scottish Borders. Every kind of property in Greenlaw is covered for window mastic. The work is guaranteed for a year. Our area takes in 89 places across the Scottish Borders. You can also see our page for Edinburgh, about 33 miles away.
Here we cover the TD10 postcode area for window mastic. We cover properties on The Square, East High Street and West High Street. Other places close to Greenlaw include Eccles (4 miles south-east), Gordon (4 miles south-west), Stichill (5 miles south), Gavinton (5 miles north-east) and Westruther (5 miles north-west). Larger places within reach include Galashiels (15 miles south-west), Kelso (7 miles south), Duns (7 miles north-east), Melrose (13 miles south-west), Earlston (10 miles south-west) and Lauder (11 miles west).
Landmarks near Greenlaw
Around Greenlaw, our work takes us to homes and buildings near Cross Keys pub, among other places. Nearby you will also find Hume Castle (2.9 miles south). Open spaces near Greenlaw include Hule Moss.
Do you need window mastic in Greenlaw?
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
It’s worth asking for a quote if you see:
- Cold air getting in at the frame edge
- Damp patches on the reveal after heavy rain
- Sealant in the wrong colour for the frame
- Draughty joints inside around the window
Around Greenlaw, as everywhere, window mastic is only as good as the preparation behind it.
Questions to ask before you book
- Which colour the sealant will be
- Who does the work, and how experienced they are
- What happens if they find a problem under the old sealant
- How long to leave it before use
Keeping the joints in good condition
Looking after new joints is easy:
- Keep drainage slots and sill grooves clear
- Don’t aim a pressure washer at the joints
- Air rooms to keep condensation down around windows
- Do not paint over the silicone
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
The process
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes anything from an hour or two to a full day, depending on how many frames there are. Outside jobs in Greenlaw need a dry day, because sealant won’t bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will come back to you with a quote.
Related advice
Quotes for window mastic in Greenlaw
Call for a quick quote. What matters most is:
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- The type of sealant required
- How many areas need sealing
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Photos by email, if that is easy
- Whether it’s a home or a business
- The rough size of the job
- How we’d reach the joints
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Different surfaces, different methods
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the sealant goes in between frame and 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.
Greenlaw questions
Do you cover Greenlaw for window mastic?
Yes. We work across all of Scotland, and Greenlaw is part of that. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing, and we will give you a clear quote.
Is Greenlaw within the area you cover?
Yes, Greenlaw is covered. We work across all of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you guarantee window mastic?
Yes. Every job comes with our one-year guarantee, and we’re ARBOMaster approved applicators.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
Can new window sealant be painted?
Most silicone cannot be painted. Let us know beforehand, and we will use a paintable product where it suits.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator.
What does window mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
Do you work for letting agents?
Yes. We work for householders, landlords, letting agents, businesses and hotels.
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.