Kent · England
Sand Mastic in Potter's Forstal
We cover Potter's Forstal for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Mastic dropping out of the joint
- Mastic that needs renewing before redecorating
- Patchy fillers round a sash window
When it isn’t the sealant
It helps to know what we cannot do too:
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
- Putty and glazing repairs
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows
- Sash and case windows
- Stone surrounds
Sand mastic for homes and businesses in Potter's Forstal
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. If you have cement or filler used on old window joints that has cracked and window mastic to renew ahead of painting, we can put it right.
Around Potter's Forstal, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Potter's Forstal (TN27)
- Wider area
- Kent
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
What the job involves on each surface
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
The process
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours per window, depending on the condition of the joints. Somewhere as small as Potter's Forstal, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- 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.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Move anything stored near the joints
- Mention any leaks or damp you’ve noticed
Get a quote
Every job is quoted individually. Simply phone 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Read more
Potter's Forstal questions
Is Potter's Forstal in your area for sand mastic?
Yes, Potter's Forstal is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Will you come out to Potter's Forstal?
Yes. Potter's Forstal is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels.
Can you replace silicone on a period window with sand mastic?
In most cases. The silicone is cut out and the joint cleaned, then point it with sand mastic.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We’ll tell you what to expect for your job.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Potter's Forstal.
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.
Towns and villages near Potter's Forstal
Also in Potter's Forstal
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
How we quote for sand mastic
We don’t publish a price list. What we look at:
- Any mould that needs treating
- When we can work, for business premises
- The number of rooms or windows
- The product the joint needs
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- The rough size of the job
- If someone has resealed it before
- Photos by email, if that is easy
- The problem you’ve noticed
For sand mastic in Potter's Forstal, phone 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.
What sand mastic looks like in Potter's Forstal
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.
If you let a flat or house near Pluckley station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Potter's Forstal is about 8 miles north-west of Ashford, in Kent. If you need sand mastic in Potter's Forstal, please phone 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover Kent. Our area takes in 922 places across Kent. Our Crawley page covers work nearby.
We cover every part of the TN27 postcode area for sand mastic and the streets around it. Nearby, we also carry out sand mastic in Egerton Forstal (1 mile south-east), Pembles Cross (1 mile north), Newland Green (1 mile south-east), Mundy Bois (1 mile south-east) and Egerton (1 mile east). Further out, we also cover Maidstone (9 miles north-west), Ashford (8 miles south-east), Sittingbourne (11 miles north), Faversham (12 miles north-east), Kings Hill (14 miles north-west) and Davington (12 miles north-east).
Landmarks near Potter's Forstal
The closest station to Potter's Forstal is Pluckley station, roughly 2.9 miles south-east of the centre. Nearby you’ll also find Coldbridge Castle (0.8 miles north-west).
What we are called out for in Potter's Forstal
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
These are the problems we are asked about most:
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
- Mastic that needs renewing before redecorating
- Weathered mastic on the most exposed windows
Managing a site like Egerton Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- How the joint is cleaned and prepared
- Is VAT in the price?
- Which colour the sealant will be
- What product goes in the joint