Kent · England
Sand Mastic in Farningham
Specialist sand mastic for Farningham: careful preparation, the right product and tidy work. Call for a quick quote.
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
- Draughts and rain around sash boxes
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes a few hours for a single window, longer for several. In a small place like Farningham, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Every job is quoted individually, so start by telling us what you need. Simply ring 0345 464 0079 or send us an email and describe the job, and pictures are welcome.
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About our sand mastic in Farningham
Sand mastic does not last for ever, leaving gaps round the window. Renewing it closes the gap so the surround looks right again. If you have mastic that needs renewing before redecorating and open joints round the window box, we can help.
In a village or hamlet like Farningham, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Farningham (DA4)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
If you manage several properties in or around Farningham, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
FAQs for Farningham
Can you do sand mastic in Farningham?
Yes, Farningham is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Is Farningham within the area you cover?
Yes, Farningham is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
What does sand mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Which is right for my windows, sand mastic or modern sealant?
We’ll help you decide. Period homes often look best with sand mastic and newer frames suit modern sealant.
What the job involves on each surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
What sealant work can’t fix
To be straight with you, some problems need a different trade:
- Masonry that needs repairing
- Broken panes
- Decayed frames that need repair
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before booking.
Surfaces we seal
- Brick reveals
- Tenement windows
- Timber door frames
- Sash and case windows
- Period & listed homes
- Stone surrounds
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Keep modern sealant off the mastic
- Leave the new mastic unpainted
- Check with your local planning authority if your home is listed
- Avoid heavy scraping on the mastic joint
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.
Quotes for sand mastic in Farningham
There’s no set price list. The quote depends on:
- Whether old sealant or filler has to be cut out
- Access and height
- Working hours on commercial sites
- The number of rooms or windows
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Helping us quote
You don’t need to know the technical terms. Just tell us:
- Pictures of the joints, sent by email
- Whether it has been sealed before
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
To get a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Places near Farningham
More services for Farningham
Sand mastic in Farningham: local notes
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Lullingstone Castle (about 1.8 miles south-west) nearby, there’s older building stock in the area around Farningham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Managing a site like The Anthony Roper Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Church of Saint Peter and Saint Paul, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Eynsford station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Farningham is about 5 miles south of Dartford, in Kent. Jobs in Farningham get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our Kent coverage runs to 922 places, and Farningham is one of them. London is on our list too, around 16 miles away.
We cover every part of the DA4 postcode area for sand mastic. We cover properties on High Street, London Road and South Hall Close and the roads around them. Nearby, we also carry out sand mastic in Eynsford (1 mile south-west), Horton Kirby (1 mile north-east), Maplescombe (2 miles south-east), Speed Gate (2 miles east) and Fawkham Green (3 miles east). Within a short drive, we also cover Maidstone (15 miles south-east), Dartford (5 miles north), Sevenoaks (7 miles south), Gravesend (8 miles north-east), Tonbridge (13 miles south) and Northfleet (7 miles north-east).
Landmarks near Farningham
We work in homes and buildings around Pied Bull pub. Farningham’s nearest station is Eynsford station, about 1.4 miles south-west of the centre. A little further out are Eynsford Castle (0.7 miles south-west) and Darenth Park Hospital (4.2 miles north). Open spaces near Farningham include The Warren.