Midlothian · Scotland
Sand mastic for sash & case windows in Old Pentland, Midlothian
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Old Pentland, backed by a 12-month guarantee. Call for a quick quote.
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
- Old sand mastic that has cracked, crumbled or fallen out
Sand mastic in Old Pentland
A silicone bead around a sash window can look out of place and isn’t always the right material. Sand mastic is the traditional choice, and we can replace one with the other. We work on stone surrounds, brick reveals and period & listed homes, and common reasons people get in touch are weathered mastic on the most exposed windows and old sand mastic that has cracked, crumbled or fallen out.
In and around a place like Old Pentland, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill.
All our work comes with a one-year guarantee.
- Location
- Old Pentland (EH20, EH10)
- Wider area
- Midlothian
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Landlord and commercial work in Old Pentland
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
We also work for property managers and facilities teams in Old Pentland and across Midlothian. Several sites can go on one quote.
Keeping the joints in good condition
Looking after new joints is easy:
- Find out about consent before window work on a listed home
- Avoid heavy scraping on the mastic joint
- Renew mastic before redecorating the windows
- Keep sills and gutters clear so water drains away
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
More services for Old Pentland
Your questions about sand mastic in Old Pentland
Will you come out to Old Pentland?
Yes, Old Pentland is covered. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you cover Old Pentland for sand mastic?
Yes, Old Pentland 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 let us know what needs doing, and we’ll give you a clear quote.
Is the work guaranteed?
Our 12-month guarantee applies on every job.
How long does sand mastic take?
It depends on the size of the job, but as a guide it takes a few hours per window, depending on the condition of the joints. We will give you a better idea when we quote.
How much does sand mastic cost in Old Pentland?
Every job is different, so each one gets its own quote. For a quick quote, email us at info@mrmastic.co.uk and tell us what needs doing and where.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does sand mastic take to go off?
The surface skins quite quickly and it hardens fully over a longer time. The weather and joint depth both affect it.
When to call us in Old Pentland
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
Common reasons people contact us include:
- Mastic that needs renewing before redecorating
- Draughty sash windows at the surround
- Mastic dropping out of the joint
- Weathered mastic on the most exposed windows
For site and facilities teams at buildings such as Gracemount High School, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- Are they insured?
- Whether you can choose the colour
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
What we can’t put right
It helps to know what we cannot do:
- Masonry that needs repairing
- Cracked or broken glass
- Decayed frames that need repair
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think before you book.
Surfaces we seal
- Sash and case windows
- Timber door frames
- Tenement windows
- Stone surrounds
- Brick reveals
- Period & listed homes
Sand mastic in Old Pentland: local notes
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
Melville Castle, about 3.1 miles east, is one of the historic houses in the wider area around Old Pentland, and older homes nearby need a sealant that suits their walls. Rented homes near Slateford station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Old Pentland is about 3 miles west of Bonnyrigg, in Midlothian. Jobs in Old Pentland get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our Midlothian coverage runs to 33 places, Old Pentland among them.
Work in EH20 and EH10 is quoted and booked the same way as anywhere else. We also cover the places around Old Pentland: Hillend (1 mile west), Bilston (1 mile south), Loanhead (1 mile east), Burdiehouse (1 mile north-east) and Roslin (2 miles south). Within a short drive, we also cover Bonnyrigg (3 miles east), Dalkeith (5 miles east), Penicuik (4 miles south-west), Gorebridge (6 miles south-east), Newtongrange (5 miles east) and Mayfield (6 miles east).
Around Old Pentland
Old Pentland’s nearest station is Slateford station, roughly 3.8 miles north-west of the centre. Well-known places in the area include Cameron Toll Shopping Centre (3.1 miles north) and Princess Margaret Rose Orthopaedic Hospital (1.2 miles north-west). The countryside around Old Pentland includes Caerketton Hill and The New Leaf Co-op.
How the visit works
At the end, we look at the finished work together and explain the cure time. The visit itself usually takes a few hours for a single window, longer for several, depending on the amount of work. Outside jobs in Old Pentland need a dry day, because sealant won’t bond to a wet joint, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Mention any parking rules near the property
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
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.
Read more
Surface by surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Leave it or put it right?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. In a place like Old Pentland, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and send you a clear quote before any work starts.
Why choose Mr Mastic in Old Pentland
- More than 20 years in sealant work
- 4.9 on Google from 180+ five-star reviews
- Experience in homes, commercial sites and hotels
- Trusted Arbo and Everbuild sealants
Take a look at how sealant jobs are priced and our reviews.