Kent · England
Sand mastic for sash & case windows in Frogham, Kent
Window and door surrounds in Frogham need attention? We remove the old material, prepare the joints and seal them properly.
- Mastic that needs renewing before redecorating
- Cement or filler used on old window joints that has cracked
- A silicone bead on a sash window that spoils the look
How the job changes by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
About our sand mastic in Frogham
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. Typical jobs include crumbling sand mastic round a window and mastic round period door frames that has failed, on sash and case windows, stone surrounds and tenement windows.
In a village or hamlet like Frogham, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or email us.
- Location
- Frogham (CT15)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Honest limits
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Damaged stone surrounds
- Putty and glazing repairs
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Where we work in Frogham
- Sash and case windows
- Timber door frames
- Stone surrounds
- Period & listed homes
- Brick reveals
- Tenement windows
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Looking after it afterwards
After the cure time, these simple habits help:
- Plan mastic work ahead of painting
- Keep modern sealant off the mastic
- Check the mastic when you check the paintwork
- Find out about consent before window work on a listed home
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself generally takes anything from a few hours to a full day, depending on how many windows, depending on the size of the job. Somewhere as small as Frogham, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or drop us an email.
Related advice
Places near Frogham
What else we do in Frogham
Frogham questions
Is Frogham within the area you cover?
Yes, Frogham 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.
Do you cover Frogham for sand mastic?
Yes. Our work covers London and the South East, and Frogham is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Should I use sand mastic or silicone?
We’ll help you decide. Sand mastic suits many period homes and newer frames suit modern sealant.
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.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings, from white and clear to greys and other shades. The product needed can limit the range.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
When to call us in Frogham
Shallow joints are a common cause. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
Most people get in touch after spotting something like this:
- Mastic dropping out of the joint
- Open joints round the window box
- Window mastic to renew ahead of painting
- Gaps round a timber door in stone or brick
If you let a flat or house near Snowdown station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Questions to ask before you book
- How the colour is chosen
- What the quote includes, VAT included or not
- Are they insured?
- What happens if they find a problem under the old sealant
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. Older cottages and farmhouses around Frogham can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or drop us an email.
Why book with us
- Arbo and Everbuild products
- Full insurance on every job
- 180+ five-star Google reviews
- 20+ years of sealant experience
What sand mastic looks like in Frogham
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Goodnestone Park (about 2.4 miles north) are a reminder that the area around Frogham has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Schools such as Nonington Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Nicholas, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Frogham is about 6 miles north-west of Dover, in Kent. Jobs in Frogham get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 922 places across Kent. There’s also a page for Chelmsford, about 49 miles away.
All of CT15 is within our area for sand mastic. We also cover the places around Frogham: Barfrestone (1 mile south-east), Snowdown (1 mile north-west), Nonington (1 mile north), Woolage Village (1 mile west) and Elvington (1 mile east). Within a short drive, we also cover Canterbury (8 miles north-west), Margate (14 miles north-east), Dover (6 miles south-east), Folkestone (9 miles south), Ramsgate (12 miles north-east) and Broadstairs (14 miles north-east).
What’s near Frogham
For rail, the closest station is Snowdown station, roughly 0.8 miles north-west. A little further out are Buckland Hospital (6 miles south-east).