Midlothian · Scotland
Sand Mastic in Dewartown
Our applicators work in Dewartown on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Window mastic to renew ahead of painting
- Mastic dropping out of the joint
- Gaps round a timber door in stone or brick
How to look after the new joints
After the cure time, these simple habits help:
- Renew mastic before redecorating the windows
- Check with your local planning authority if your home is listed
- Avoid patching sand mastic with silicone
- Ask us before painting near the mastic
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
About our sand mastic in Dewartown
We work across Dewartown renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand for a neat, traditional finish. If you have patchy fillers round a sash window and a silicone bead on a sash window that spoils the look, we can help, on period & listed homes, timber door frames and brick reveals alike.
Outdoor sealant needs a dry surface, so window work around Dewartown is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
Our work is backed for twelve months, in Dewartown and everywhere else we cover.
- Location
- Dewartown (EH23)
- Region
- Midlothian
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we cannot put right
We’d rather tell you now than do work that won’t last, so these are the limits:
- Masonry that needs repairing
- Putty and glazing repairs
- Sashes that rattle, stick or will not open
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
Surfaces we seal
- Tenement windows
- Sash and case windows
- Timber door frames
- Period & listed homes
- Stone surrounds
- Brick reveals
Frames and glazing around Dewartown
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home 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.
Schools such as Newbattle Community High School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Melville Castle, about 4.6 miles west, is one of the historic houses in the wider area around Dewartown.
Dewartown is about 3 miles south-east of Dalkeith, in Midlothian. We provide sand mastic to homeowners, landlords and businesses in Dewartown and the surrounding area, as part of our work across Midlothian. Across Midlothian, we cover 33 places, and Dewartown is one of them. For nearby work, see our Edinburgh page (10 miles or so).
All of EH23 is covered for sand mastic, from the main roads to the quietest streets. Close by, we work 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
The closest station to Dewartown is Gorebridge station, roughly 2.7 miles south-west. Other landmarks nearby include Midlothian Community Hospital (3.8 miles west) and Oxenfoord Castle (1.1 miles north-east).
What happens if it’s left?
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. In a place like Dewartown, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why us?
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
- Fully insured
- One-year guarantee on every job
See our cost guide and what customers say.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Do you need sand mastic in Dewartown?
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
These are the problems we’re asked about most:
- Gaps round a timber door in stone or brick
- Wind and rain getting in round a sash window
- Cement or filler used on old window joints that has cracked
- Old sand mastic that has cracked, crumbled or fallen out
Rented homes near Gorebridge station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Questions to ask before booking
- Are they insured?
- What preparation is included
- How long to leave it before use
- Is the old sealant removed completely?
What we do, step by step
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to a full day, depending on how many windows. For a place like Dewartown, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Move anything stored near the joints
- Tell us about any water getting in
- Try not to wet indoor joints just before the visit
Ask for a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, send an email to info@mrmastic.co.uk.
Advice
Questions from Dewartown
Is Dewartown in your area for sand mastic?
Yes. Our work covers the whole of Scotland, and Dewartown is part of that. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
Do you work for landlords with property near Gorebridge station?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. You can email us at info@mrmastic.co.uk with the details for a clear quote.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. The old silicone has to come out completely so the mastic can sit properly.
Can I add another job to the visit?
Yes. Just list everything you need.
How long does sand mastic take to go off?
Not right away. The skin forms first, and the full set comes later and we’ll give you an idea for your job.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Can you seal over the old sealant?
No. We remove every bit of old sealant first.
What else we do in Dewartown
Surface by surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Period and listed homes
Period homes look their best with traditional materials, and sand mastic is one of them.