Midlothian · Scotland
Window & door mastic in Dewartown, Midlothian
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Dewartown. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Whistling draughts around closed windows
How we handle window mastic in Dewartown
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. We work on composite doors, aluminium frames and uPVC windows, and people most often call us about damp patches on the reveal after heavy rain and draughty joints inside around the window.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
Every job comes with a one-year guarantee.
- Location
- Dewartown (EH23)
- Region
- Midlothian
- Guarantee
- A year, on every job
- Price
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we are called out for in Dewartown
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid cannot stretch. That’s what backing rod is for.
The most common problems we see are:
- Cold air getting in at the frame edge
- Draughty joints inside around the window
- Old mastic that has gone black or come away
- A bead that does not match the frame
Managing a site like Newbattle Community High School? Then its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- Is the old sealant removed completely?
- How hidden problems are handled
- How long the guarantee is
- How the surfaces are prepared before sealing
Why it’s worth doing now in Dewartown
The work is quick compared with the damage it prevents: it takes most of a day for a typical house, less for a few frames. Wait for damp to appear and there may be plaster and decorating to sort out too. In an older home around Dewartown, damp from a failed joint can get 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 send an email to info@mrmastic.co.uk.
Why Dewartown customers choose us
- Neat joints and a tidy finish
- Sanitary silicone with an anti-fungal additive in wet areas
- 20+ years of sealant experience
- Colour picked to suit the job
FAQs for Dewartown
Can you do window mastic in Dewartown?
Yes, Dewartown is within the area we cover. We work across all of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job.
Is Dewartown within the area you cover?
Yes. Dewartown is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
How long will my window job take?
A handful of frames is a short visit, while a whole house takes longer. We confirm the timing with your quote.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used before we leave.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
How much does window mastic cost in Dewartown?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
More services for Dewartown
Landlords, agents and businesses in Dewartown
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
How we quote for window mastic
Jobs vary more than people expect. What affects the quote:
- The size of the job
- Any working-time requirements on site
- How many areas need sealing
- Whether the work is at height
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
What to tell us for a quote
You don’t need to know the technical terms. Just tell us:
- The address or postcode of the job
- Whether it has been sealed before
- Roughly how big the job is
- The problem you’ve noticed
For window mastic in Dewartown, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Windows and doors in Dewartown
Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Historic houses like Melville Castle (about 4.6 miles west) are a reminder that the area around Dewartown has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Melville Castle, about 4.6 miles west, is one of the historic houses in the wider area around Dewartown, and older homes nearby need a sealant that suits their walls. Letting a property close to Gorebridge station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Dewartown is about 3 miles south-east of Dalkeith, in Midlothian. Whether you are in the middle of Dewartown or further out, window mastic is available for homes and businesses alike. Across Midlothian, we cover 33 places, Dewartown among them. Our Edinburgh page covers work nearby.
We work across EH23 for window mastic. Nearby, we also carry out window mastic in Edgehead (1 mile north-west), Pathhead (1 mile east), D'Arcy (1 mile west), Mayfield (2 miles west) and Easthouses (2 miles north-west). Further out, we also cover Bonnyrigg (4 miles west), Dalkeith (3 miles north-west), Penicuik (9 miles west), Loanhead (6 miles west), Gorebridge (3 miles south-west) and Newtongrange (3 miles west).
Near you in Dewartown
Dewartown’s nearest station is Gorebridge station, about 2.7 miles south-west. Well-known places in the area include Midlothian Community Hospital (3.8 miles west) and Oxenfoord Castle (1.1 miles north-east).
What happens on the day
On the day, we start by going over the job with you. Surfaces next to the work are protected before work begins. Most jobs take a morning for a couple of windows and a door. Somewhere like Dewartown may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- 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.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
- Let us know about earlier repairs to the joints
Ask for a quote
Need a quote? Please drop us a line at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Read more
When it is not the sealant
It helps to know what we can’t do:
- Condensation trapped between the panes
- A sash or casement that will not close properly
- Damp problems in the wall away from the window
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before booking.
Surfaces we seal
- Window sills
- Composite doors
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Aluminium frames