Aberdeenshire · Scotland
New Leeds Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in New Leeds and across Aberdeenshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Wind and rain getting in round a sash window
- Modern sealant on a period surround
- Mastic round period door frames that has failed
Sand mastic in New Leeds, done properly
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted, so ask us before you decorate. We work on timber door frames, brick reveals and tenement windows, and people most often call us about silicone on a period window that looks wrong and failed mastic on an exposed elevation.
In and around a place like New Leeds, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
Your job is guaranteed for a year, as with all our work.
- Where
- New Leeds (AB42)
- Wider area
- Aberdeenshire
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Aftercare tips
To keep the joints looking good and working properly:
- Inspect the joints round the windows every year or so
- Find out about consent before window work on a listed home
- Keep sills and gutters clear so water drains away
- Don’t run silicone over sand mastic
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Windows and doors in New Leeds
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. 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.
For an older house near a landmark such as Church and Manse, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
New Leeds is about 7 miles south of Fraserburgh, in Aberdeenshire. Every kind of property in New Leeds is covered for sand mastic. Every job comes with our 12-month guarantee. 161 places in Aberdeenshire are on our list, large and small. Aberdeen is on our list too, about 30 miles from New Leeds.
Here we cover the AB42 postcode area for sand mastic. Whether your property is on Mormond View, Manse Street and St Mary Terrace or a nearby road, our applicators can take on the job. If you are just outside New Leeds, we cover Fetterangus (2 miles south), Strichen (3 miles west), Crimond (4 miles east), Mintlaw (4 miles south) and Old Deer (4 miles south). We also work in nearby towns such as Peterhead (9 miles south-east), Fraserburgh (7 miles north), Ellon (15 miles south), Roanheads (10 miles south-east), Clerkhill (10 miles south-east) and Port Henry (10 miles south-east).
Near you in New Leeds
Well-known places in the area include Aberdeenshire Museums Discovery Centre (3.9 miles south). Green spaces nearby include Strichen Lake and Mormond Hill.
Surface by surface
Timber door frames
Doors face weather and wear and the mastic can crack early. We rake it out and renew it.
Period and listed homes
A traditional finish suits a period property.
New Leeds: your questions answered
Do you cover smaller places like New Leeds?
Yes, we do. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is there a guarantee on sand mastic in New Leeds?
All our work, in New Leeds and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Where are you based?
We work from Crawley. Our applicators cover New Leeds, along with the rest of our area.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We’ll tell you what to expect for your job.
How long will you be here?
Typically it takes anything from a few hours to a full day, depending on how many windows. Larger jobs naturally take longer.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Do you remove the old sealant?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Is it worth trying 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.
When to call us in New Leeds
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint, and they usually need raking out.
If you can see any of these, it’s time to have the joints looked at:
- Gaps round a timber door in stone or brick
- Failed mastic on an exposed elevation
- Old cement repairs round a window that have failed
- Mastic that needs renewing before redecorating
In and around New Leeds, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Before booking anyone
- Whether they’re fully insured
- What product goes in the joint
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
What we do, step by step
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work starts. The work generally takes anything from a few hours to a full day, depending on how many windows. Outside jobs in New Leeds need a dry day, because sealant won’t bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
- Mention if the joints have been sealed before
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just drop us a line at info@mrmastic.co.uk with the details.
Read more
Also near New Leeds
More services for New Leeds
When something else is needed
We will always be straight with you, so here’s what new sealant will not do:
- Timber that has rotted
- Sashes that rattle, stick or will not open
- Decisions on consent for listed homes
If you’re not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
What we seal
- Sash and case windows
- Timber door frames
- Brick reveals
- Tenement windows
- Period & listed homes
- Stone surrounds
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, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What happens if it’s left?
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. In a place like New Leeds, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Why book with us
- We are fully insured
- Over 20 years’ experience
- Approved under the ARBOMaster scheme
- Tidy, careful work