Kent · England
Sand mastic for sash & case windows in Cranbrook, Kent
Sand mastic in Cranbrook from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old cement repairs round a window that have failed
- Wind and rain getting in round a sash window
- Gaps where the frame meets the masonry
How we handle sand mastic in Cranbrook
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted and we will advise if you are redecorating. Common call-outs are for gaps round a timber door in stone or brick and wind and rain getting in round a sash window, on stone surrounds, timber door frames and brick reveals.
Homes around Cranbrook range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or drop us an email.
- Where
- Cranbrook (TN17, TN18)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic is the traditional material and blends with the stone or brick. In a smaller place like Cranbrook, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and agree the price before starting.
Why Cranbrook clients choose us
- 180+ five-star Google reviews
- 20+ years of sealant experience
- Fully insured
- We leave the area clean and tidy
Take a look at what affects the cost or our reviews.
For landlords and businesses
For anyone letting property in or around Cranbrook, several properties can be quoted together. Just tell us the addresses and what each one needs.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Signs you need sand mastic in Cranbrook
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Keep an eye out for these signs:
- Crumbling sand mastic round a window
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
- Wind and rain getting in round a sash window
Homes close to Congregational Church include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in.
What to look for in a quote
- How the colour is chosen
- Who does the work, and how experienced they are
- Whether the sealant suits the joint
- Whether VAT is included
Places near Cranbrook
More services for Cranbrook
How the job changes by surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
FAQs for Cranbrook
Is Cranbrook in your area for sand mastic?
Yes. We work across London and the South East, and Cranbrook is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear price.
Is there a guarantee on sand mastic in Cranbrook?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
What’s sand mastic made of?
A traditional pointing material made from sand and a linseed-oil-based binder for the joint between timber frames and masonry.
Should I check with the council before work on a listed or conservation-area home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Can landlords and businesses book you?
Yes, often. Several properties can go on one quote.
How do I get a quote for sand mastic in Cranbrook?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or drop us an email and tell us what needs doing and where.
I rent my home. Can I book you?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Cranbrook homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Cranbrook School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Cranbrook is about 12 miles south of Maidstone, in Kent. Wherever you are in the TN17 postcode area, our applicators can take on sand mastic. Our Kent coverage runs to 922 places, Cranbrook among them. Our Crawley page covers work nearby.
Every address in TN17 and TN18 is within our area for sand mastic, from the main roads to the quietest streets. You will find streets such as High Street, Crane Lane and White Lion Yard, all of which we cover. If you are just outside Cranbrook, we cover Baker's Cross (1 mile east), Coursehorn (1 mile east), Swattenden (1 mile south), Hartley (1 mile south-west) and Gill's Green (3 miles south-west). Larger places within reach include Maidstone (12 miles north), Ashford (15 miles east), Royal Tunbridge Wells (12 miles west), Tonbridge (13 miles north-west), Kings Hill (13 miles north-west) and Foley Park (13 miles north).
What’s near Cranbrook
Locally, jobs take us to homes and businesses close to The Crown Public House, Crane Valley and Cranbrook Church of England Primary School and the streets around them. A little further out are Sissinghurst Castle (2.5 miles north-east) and Benenden Hospital (3.6 miles east).
How we quote for sand mastic
Every job gets its own quote. This is what makes a difference:
- Whether there’s mould to deal with
- The type of sealant required
- Access and height
- Working hours on commercial sites
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Helping us quote
What to tell us when you ask for a quote:
- Whether it has been sealed before
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
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 pictures by email if you can.
When something else is needed
Sealant isn’t the answer to every problem, and we’d rather say so up front. It will not solve:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Whether work needs listed building consent
- Broken panes
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Period & listed homes
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
What we do, step by step
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it usually takes anything from a few hours to a full day, depending on how many windows. In a smaller place like Cranbrook, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.