Dumfries and Galloway · Scotland
Sand mastic for sash & case windows in Howes, Dumfries and Galloway
Professional sand mastic in and around Howes, with old sealant always removed completely and a one-year guarantee.
- Draughty sash windows at the surround
- Mastic that needs renewing before redecorating
- A silicone bead on a sash window that spoils the look
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask a joiner to look at soft timber first
- Don’t run silicone over sand mastic
- Ask us before painting near the mastic
- Sort the mastic before the decorators arrive
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Sand mastic in Howes, done properly
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted and we’ll advise if you are redecorating. If you are dealing with draughts and rain around sash boxes and patchy fillers round a sash window, we can help, on period & listed homes, timber door frames and brick reveals alike.
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.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Howes (DG12)
- Wider area
- Dumfries and Galloway
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What we cannot put right
In fairness, there are a few things sealant won’t fix:
- Cracked or broken glass
- Planning or listed building consent (your local planning authority decides)
- Decayed frames that need repair
If you are not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
Joints and surfaces we work on
- Brick reveals
- Timber door frames
- Sash and case windows
- Period & listed homes
- Tenement windows
- Stone surrounds
More services for Howes
Why act early in Howes
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Around Howes, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- 20+ years of sealant experience
- Full insurance on every job
- A 12-month guarantee on all work
- Experience in homes, commercial sites and hotels
Take a look at how sealant jobs are priced and customer reviews.
Howes questions
Does living near the coast affect sand mastic in Howes?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you work for landlords with property near Annan station?
Yes, rental work is part of what we do. Just email us at info@mrmastic.co.uk and tell us about the property, and we’ll give you a clear price.
Where is Mr Mastic based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
Should I use sand mastic or silicone?
Sand mastic usually suits period timber windows best. On modern frames, we’d normally use a flexible sealant.
Do you work in Howes?
Yes. We’re based in Crawley and work across South East England, London and Scotland, and that includes Howes.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before any work starts.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
How long does the job take?
Typically it takes a few hours for a single window, longer for several. Bigger jobs take longer.
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
When to call us in Howes
Some old mastic was never deep enough. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
If you can see any of these, it’s time to have the joints looked at:
- Mastic that needs renewing before redecorating
- Mastic round period door frames that has failed
- Mastic dropping out of the joint
- Silicone on a period window that looks wrong
If you let a flat or house near Annan station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Before you book anyone
- What happens if they find a problem under the old sealant
- How long to leave it before use
- How the surfaces are prepared before sealing
- Whether you can choose the colour
How the visit works
You don’t need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a single window, longer for several in most cases. For a place like Howes, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, send an email to info@mrmastic.co.uk.
Read more
Howes homes and the weather
Howes is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. 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.
Managing a site like Annan Academy? Then larger buildings have plenty of frames, and the mastic around each one ages. Homes close to Old Parish Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Howes is about 14 miles east of Dumfries, in Dumfries and Galloway. Every kind of property in Howes can book us for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Howes is one of 138 towns and villages in Dumfries and Galloway where we work for sand mastic. There’s also a page for Edinburgh, roughly 66 miles from Howes.
We work across DG12 for sand mastic and the streets around it. We also cover the places around Howes: Annan (1 mile east), Newbie (1 mile south-west), Brydekirk (2 miles north), Powfoot (3 miles west) and Dornock (3 miles east). Larger places within reach include Dumfries (14 miles west), Lockerbie (10 miles north), Heathhall (14 miles north-west), Langholm (15 miles north-east), Gretna (8 miles east) and Lochmaben (12 miles north-west).
Landmarks near Howes
Typical jobs here are in homes near Queensberry Arms Hotel. The closest station to Howes is Annan station, about 0.6 miles south-east of the centre. Well-known places in the area include Annan Museum (under half a mile south-east) and Annan Hospital (0.9 miles east). For a walk, there’s Campfield Marsh RSPB reserve.
Landlord and commercial work in Howes
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.