Midlothian · Scotland
Window Mastic in Loanhead
Mastic around window and door frames, sills and patio doors for homes and businesses in Loanhead and across Midlothian. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Black, perished sealant on frames
- Cold air getting in at the frame edge
- Cracked internal joints between frame and plaster
Window mastic for homes and businesses in Loanhead
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on timber windows & doors, uPVC windows and patio & French doors, and common reasons people get in touch are untidy mastic left by window fitters and cracked or shrunken mastic around the frame.
Mastic can only go onto a dry joint, so outside work in Loanhead depends on the weather. Tell us about access to all the windows and doors, upstairs included.
The work is covered for a year after we finish. If there’s a problem with it, please send an email to info@mrmastic.co.uk.
- Place
- Loanhead (EH20)
- Wider area
- Midlothian
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What happens on the day
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a morning for a couple of windows and a door, depending on the size of the job. Outdoor work around Loanhead depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
- Clear the area around the work
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, drop us a line at info@mrmastic.co.uk.
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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. In an older home around Loanhead, damp from a failed joint can get into timber and plaster.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why Loanhead customers choose us
- We never seal over old sealant
- You choose the colour before work begins
- A sealant colour to suit the surroundings
- Arbo and Everbuild products
See our cost guide and customer reviews.
Also near Loanhead
Also in Loanhead
Quotes for window mastic in Loanhead
For a quick quote, just ask. What matters most is:
- The size of the job
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- Access and height
Combining jobs into one visit normally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- A few photos by email, if you can
- The problem you’ve noticed
- Any previous sealing or DIY work
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
When to call us in Loanhead
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Common reasons people contact us include:
- Damp patches on the reveal after heavy rain
- Whistling draughts around closed windows
- Gaps left after new windows were fitted
- White mastic on grey or black frames
Schools such as Lasswade High School Centre are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- What insurance they hold
- What the cure time is
- How long the guarantee is
- How the joint is cleaned and prepared
When something else is needed
We won’t take on work that will not last, so these are the limits:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Broken hinges, locks or handles
- Damp coming through the wall itself rather than the frame joint
Not sure which it is? You can send an email to info@mrmastic.co.uk and we will tell you honestly.
Where we work in Loanhead
- Timber windows & doors
- Window sills
- Composite doors
- uPVC windows
- Patio & French doors
- Aluminium frames
Frames and glazing around Loanhead
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. 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.
Melville Castle, about 2.2 miles north-east, is one of the historic houses in the wider area around Loanhead, and older homes nearby need a sealant that suits their walls. If you let a flat or house near Eskbank station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Loanhead is about 2 miles west of Bonnyrigg, in Midlothian. Every kind of property in Loanhead can book us for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our area takes in 33 places across Midlothian.
Jobs for window mastic in EH20 works the same way as everywhere else we cover. That includes homes and businesses on Station Road, Main Street and High Street and the roads around them. Being close to the A701 and A768, Loanhead is easy for our applicators to reach. Close by, we work in Old Pentland (1 mile west), Bilston (1 mile south-west), Polton (1 mile south-east), Burdiehouse (1 mile north) and Roslin (1 mile south). We also work in nearby towns such as Dalkeith (4 miles east), Penicuik (4 miles south-west), Gorebridge (5 miles south-east), Newtongrange (4 miles east), Mayfield (5 miles east) and Shawfair (4 miles north-east). Loanhead is among the bigger towns we cover in Midlothian.
Local landmarks in Loanhead
For rail, the closest station is Eskbank station, about 2.9 miles east of the centre. A little further out are Cameron Toll Shopping Centre (3.3 miles north) and Glencorse Museum (3 miles south-west). The countryside around Loanhead includes Caerketton Hill and The New Leaf Co-op.
Your questions about window mastic in Loanhead
Will you come out to Loanhead?
Yes, we do. We work across all of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Eskbank station?
Yes. We work for landlords and agents as well as householders. Just send an email to info@mrmastic.co.uk with the address and what needs doing, and we will send you a clear quote.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Can I paint over the new sealant?
It depends on the sealant. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you’re decorating and we will choose accordingly.
What does window mastic cost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Can you do several jobs on one visit?
Yes, we can. More than one area can be quoted together.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
For landlords and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We also work for property managers and facilities teams in Loanhead and across Midlothian. We can quote a run of properties together.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Do not use solvent cleaners on the joint
- Clear any debris from frame drain holes
- Wipe condensation off the frames
- Keep paint off silicone joints
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
Leaks generally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.