Scottish Borders · Scotland
Stirches Window Mastic
Window mastic in Stirches from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cold air getting in at the frame edge
- White mastic on grey or black frames
- Leaking joints at the ends of sills
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
If you do try it yourself, take your time over the 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.
Window mastic in Stirches, done properly
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that can’t flex, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We’re often asked to deal with mastic that’s falling out in pieces and draughty joints inside around the window, across window sills, aluminium frames and composite doors.
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.
Your job is guaranteed for a year, as with all our work.
- Location
- Stirches (TD9)
- Wider area
- Scottish Borders
- Cover
- One year on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Updated
- 26 October 2026
How the job changes by surface
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
Composite doors
Front doors take the weather head on. Those corners get the most care.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Do not paint over the silicone
- Keep timber frames painted
- Check the mastic once a year
- Air rooms to keep condensation down around windows
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take most of a day for a typical house, less for a few frames. In smaller Scottish places, parking is usually less of an issue than access and distance. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Ask for a quote
For a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Read more
How we quote for window mastic
For a quick quote, just ask. The main things that affect it are:
- Whether there’s mould to deal with
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
We don’t show prices on the 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 will talk you through it.
What to tell us for a quote
When you call or email, these details help:
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- Whether it has been sealed before
We don’t publish a price list. Instead, we give you a clear price for your job. To arrange one, drop us a line at info@mrmastic.co.uk.
Windows and doors in Stirches
Historic houses like Harden (about 3.1 miles west) are a reminder that the area around Stirches has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Schools such as Hawick High School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Stirches is about 1 mile north-west of Hawick, in the Scottish Borders. If you need window mastic in Stirches, please send an email to info@mrmastic.co.uk for a quick quote. We cover the Scottish Borders from our Crawley base. Our the Scottish Borders coverage runs to 89 places, Stirches among them. You can also see our page for Edinburgh, roughly 39 miles from Stirches.
Postcode districts we cover here for window mastic: TD9. That includes homes and businesses on Bowden Road, Stirches Road and Atkinson Road. We also cover the places around Stirches: Wilton (1 mile south), Hawick (1 mile south-east), Wilton Dean (1 mile south-west), Burnfoot (1 mile east) and Woll (4 miles north-west). Within a short drive, we also cover Galashiels (12 miles north), Selkirk (8 miles north), Jedburgh (10 miles east), Melrose (12 miles north), Earlston (15 miles north) and Langlee (12 miles north).
What’s near Stirches
Locally, jobs take us to homes and businesses close to The Bourtree pub and the streets around them. Nearby you’ll also find Borders Textile Towerhouse (0.9 miles south) and Hawick Community Hospital (0.7 miles south). Open spaces near Stirches include Ashkirk Hill and Ashkirk Loch.
Other services in Stirches
What happens if it’s left?
Not every sealant suits a window. Interior caulk and bathroom silicone are not made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. In an older home around Stirches, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
What you get with us
- White, clear, grey or coloured to suit, where the product allows
- Neat joints and a tidy finish
- Experience in homes, commercial sites and hotels
- Sealant colour chosen to suit
Stirches: your questions answered
Is window mastic in Stirches guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Can you do window mastic in Stirches?
Yes, Stirches 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 give you a clear quote.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Do you work on first-floor windows?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Can you do the inside joint as well?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
Can you match the sealant to my frames?
Yes, in most cases. Mention the frame colour when you ask for a quote and we will match it as closely as we can.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
How long does it take to reseal the windows on a house?
Allow a few hours for a handful of frames, longer for a whole house. Access and the amount of old mastic make the biggest difference.
Do you need window mastic in Stirches?
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Keep an eye out for these signs:
- Gaps where the sill meets the wall
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
- Draughty joints inside around the window
In the older streets around Wilton Parish Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before you book anyone
- Whether VAT is included
- Are they insured?
- Whether all the old sealant comes out first
- The length of the guarantee