Kent · England
The Valley Sand Mastic
Sand mastic across The Valley and nearby, with old sealant always removed completely and a 12-month guarantee.
- Cement or filler used on old window joints that has cracked
- Gaps where the frame meets the masonry
- Draughts and rain around sash boxes
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
About our sand mastic in The Valley
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. Typical jobs include gaps between timber frames and stone or brick and mastic worn away on windows facing the weather, across period & listed homes, sash and case windows and brick reveals.
Homes in small places like The Valley often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
You’re covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Where
- The Valley (ME13)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
After the cure time, these simple habits help:
- Look over the window mastic once a year
- Go gently near the mastic when preparing windows
- Get any rot dealt with first
- Do not run silicone over sand mastic
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
When something else is needed
We will not take on work that will not last, so these are the limits:
- Putty and glazing repairs
- Crumbling stone or brickwork round the window
- Sashes that rattle, stick or won’t open
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Period & listed homes
- Brick reveals
- Stone surrounds
- Sash and case windows
- Tenement windows
- Timber door frames
What sand mastic looks like in The Valley
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Belmont House and Gardens (about 2.1 miles north-east) nearby, there’s older building stock in the area around The Valley as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Letting a property close to Charing station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of St Lawrence include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
The Valley is about 6 miles south-west of Faversham, in Kent. Our applicators cover sand mastic for homeowners, landlords and businesses in The Valley and the surrounding area. The Valley is one of 922 towns and villages in Kent we cover. We also work in Chelmsford, about 36 miles from The Valley.
Postcode districts we cover here for sand mastic: ME13. Close by, we work in Stalisfield Green (1 mile south), Stalisfield (1 mile south), Eastling (2 miles north), Throwley Forstal (2 miles east) and Throwley (2 miles north-east). Further out, we also cover Maidstone (12 miles west), Ashford (8 miles south), Canterbury (12 miles east), Sittingbourne (7 miles north-west), Whitstable (12 miles north-east) and Faversham (6 miles north-east).
Around The Valley
In The Valley, that means homes and buildings near Spuckles and Kennelling Woods and The Plough Inn and the streets around them. For rail, the closest station is Charing station, about 3.2 miles south of the centre. A little further out are Newnham Castle (2.3 miles north).
Quotes for sand mastic in The Valley
You’ll get a clear quote before any work starts. It takes into account:
- The old material and how stubborn it is
- Which sealant suits the joint
- How many rooms, windows or areas are involved
- Any working-time requirements on site
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What to tell us for a quote
Before you ask for a quote, have a think about:
- A few pictures by email, if you can
- The address or postcode of the job
- If someone has resealed it before
- Any access issues, like height or stairs
If you’re in The Valley and need sand mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
DIY sealant or a professional job?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Why it’s worth doing now in The Valley
Not every filler suits an old window surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Older cottages and farmhouses around The Valley can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
What you get with us
- 180+ five-star Google reviews
- 12-month guarantee on every job
- 20+ years of sealant experience
- Quality sealants from Arbo and Everbuild
See our cost guide or our reviews.
How it works
At the end, we look at the finished work together. The work normally takes anything from a few hours to a full day, depending on how many windows, depending on the size of the job. In a small place like The Valley, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- On commercial sites, let us know about site rules
- Mention any parking rules near the property
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
Read more
The Valley: your questions answered
Is The Valley in your area for sand mastic?
Yes. Our work covers London and the South East, and The Valley is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
Will you come out to The Valley?
Yes, The Valley is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Is consent needed for window work on a listed home?
Speak to your local planning authority before work starts. Like-for-like sand mastic is often the preferred finish but the decision is theirs.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Do you guarantee sand mastic work?
Every job comes with our 12-month guarantee, and we’re fully insured.
Can you match the sealant colour?
We’ll suggest a colour to suit the surroundings, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.