Kent · England
Throwley Forstal Sand Mastic
Sand mastic for Throwley Forstal, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed mastic on an exposed elevation
- Gaps round a timber door in stone or brick
- Gaps where the frame meets the masonry
Sand mastic in Throwley Forstal
We work across Throwley Forstal renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. If you have open joints round the window box and mastic that needs renewing before redecorating, we can put it right.
Outdoor sealant needs dry, clean surfaces, so work on frames around Throwley Forstal is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
You get a 12-month guarantee, the same in Throwley Forstal as everywhere else we work.
- Location
- Throwley Forstal (ME13)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When something else is needed
A few problems are outside what sealant work can do:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Cracked or broken glass
- Decisions on consent for listed homes
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before you book.
Joints and surfaces we work on
- Brick reveals
- Stone surrounds
- Tenement windows
- Timber door frames
- Sash and case windows
- Period & listed homes
Also near Throwley Forstal
Also in Throwley Forstal
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Do not paint over the new mastic
- Avoid patching sand mastic with silicone
- Clear gutters so water doesn’t pour onto the windows
- Inspect the joints round the windows every year or so
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
Quotes for sand mastic in Throwley Forstal
Jobs vary more than people expect. The main factors:
- The amount of work
- The type of sealant required
- Access and height
- Working hours on commercial sites
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first.
Asking for a quote
When you contact us, it’s useful to know:
- How many joints, rooms or windows are involved
- If someone has resealed it before
- Photos by email, if that is easy
- If it’s domestic, commercial or a hotel
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details.
Work for landlords, hotels and businesses
We work for landlords and letting agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What sand mastic looks like in Throwley Forstal
With historic houses such as Belmont House and Gardens (about 1.1 miles north) nearby, there’s older building stock in the area around Throwley Forstal as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Church of St Michael and All Angels, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Selling station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Throwley Forstal is about 4 miles south of Faversham, in Kent. Throwley Forstal gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Kent coverage runs to 922 places, Throwley Forstal among them. You can also see our page for Chelmsford, about 37 miles away.
Postcode districts we cover here for sand mastic: ME13. Other places close to Throwley Forstal include Throwley (1 mile north), Badlesmere (1 mile east), Sheldwich (2 miles north-east), Sheldwich Lees (2 miles north-east) and The Valley (2 miles west). We also work in nearby towns such as Maidstone (14 miles west), Ashford (8 miles south), Canterbury (10 miles east), Sittingbourne (8 miles north-west), Whitstable (10 miles north-east) and Faversham (4 miles north).
Around Throwley Forstal
For rail, the closest station is Selling station, about 4.1 miles east of the centre. Well-known places in the area include Newnham Castle (3 miles north-west).
How it works
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. The work usually takes a few hours for a single window, longer for several. Somewhere like Throwley Forstal needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
Ask for a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Read more
FAQs for Throwley Forstal
Do you cover Throwley Forstal for sand mastic?
Yes. We work across London and the South East, and Throwley Forstal is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Will you come out to Throwley Forstal?
Yes. Throwley Forstal 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 I need to be at home?
It depends on the job. Inside work needs someone to give us access.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
How much does sand mastic cost in Throwley Forstal?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or send us an email with a short description of the job.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
Do you offer different sealant colours?
Generally, yes. White, clear and grey are common, and other colours are available for many products, and we agree the colour with you before work begins.
What the job involves on each surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.