Kent · England
Sand mastic for sash & case windows in Holborough, Kent
We cover Holborough for 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.
- Crumbling sand mastic round a window
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
Sand mastic for homes and businesses in Holborough
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. If you have window mastic to renew ahead of painting and gaps round a timber door in stone or brick, we can help, on tenement windows, stone surrounds and sash and case windows alike.
In a smaller place like Holborough, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
We stand behind the work with a one-year guarantee.
- Place
- Holborough (ME6, ME1, ME19)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Holborough homes and the weather
Historic houses like Starkey Castle (about 1.9 miles north) are a reminder that the area around Holborough has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of the New Jerusalem, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as Valley Invicta Primary School at Holborough Lakes, its window and door frames need their mastic kept sound, just like a home’s.
Holborough is about 4 miles west of Chatham, in Kent. From the centre of Holborough to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Kent, we cover 922 places, Holborough among them. For nearby work, see our London page (26 miles or so).
Postcode districts we cover here for sand mastic: ME6, ME1 and ME19. That includes homes and businesses on Lee Road, Byrne Road and Ladds Lane and the roads around them. We also cover Snodland (1 mile south-west), Peters Village (1 mile east), Scarborough (1 mile east), Upper Halling (1 mile north-west) and Wouldham (1 mile north-east). Larger places within reach include Maidstone (6 miles south-east), Sittingbourne (13 miles east), Dartford (12 miles north-west), Sevenoaks (12 miles west), Gravesend (7 miles north-west) and Tonbridge (12 miles south-west).
Local landmarks in Holborough
We work in homes and buildings around The Monks Head pub, Holborough Marshes and The Holmesdale School. Holborough’s nearest station is Snodland station, roughly 0.5 miles south. A little further out are St. Catherine's Hospital (4.2 miles north-east) and Leybourne Castle (2.5 miles south-west). Not far away are Blue Bell Hill and Burham Down.
What we are called out for in Holborough
Some old mastic was never deep enough. Mastic that is too thin cracks and drops out so we make sure the new mastic is the right thickness.
Any of these means the joints need attention:
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
- Crumbling sand mastic round a window
Letting a property close to Snodland station? Then any sash windows need sound mastic to keep draughts and rain out.
What your quote should include
- How long to leave it before use
- Is VAT in the price?
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
Your questions about sand mastic in Holborough
Do you cover smaller places like Holborough?
Yes. Holborough is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Snodland station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Are you fully insured?
Yes. We’re fully insured for every job we do.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will talk you through it.
Is the work guaranteed?
You get our one-year guarantee on every job.
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
Aftercare tips
Good habits help new joints last longer. A few tips:
- Sort the mastic before the decorators arrive
- Ask a joiner to look at soft timber first
- Avoid heavy scraping on the mastic joint
- Check with your local planning authority if your home is listed
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber, which can lead to rot.
Leave it or put it right?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. Homes in smaller places like Holborough can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Holborough
- We leave the area clean and tidy
- Quality sealants from Arbo and Everbuild
- 12-month guarantee on every job
- 4.9 on Google from 180+ five-star reviews
Towns and villages near Holborough
More services for Holborough
How the job changes by surface
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. We rake it out and renew it.
How we quote for sand mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- The product the joint needs
- Whether there’s mould to deal with
- The old material and how stubborn it is
- The size of the job
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
If you are in Holborough and need sand mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
What happens on the day
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before we start. The work generally takes a few hours for a single window, longer for several. In a smaller place like Holborough, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.