Kent · England
Kemsing Sand Mastic
Professional sand mastic in and around Kemsing, with every bit of old sealant taken out first and a one-year guarantee.
- Gaps round a timber door in stone or brick
- Mastic that needs renewing before redecorating
- Gaps between timber frames and stone or brick
Sand mastic in Kemsing
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. If you are dealing with mastic dropping out of the joint and mastic round period door frames that has failed, we can put it right, whatever the surface.
In smaller places like Kemsing, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Location
- Kemsing (TN15)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Landlord and commercial work in Kemsing
For anyone letting property in or around Kemsing, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
We work for landlords and letting agents as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Other services in Kemsing
What we do, step by step
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to a full day, depending on how many windows. A visit to Kemsing is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- 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 isn’t too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
- Clear items away from the joints we’re working on
Getting a quote
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or email us with the details, and photos are welcome.
Advice
Leave it or put it right?
If you’re redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps, and the new mastic is traditionally left unpainted. In an older home around Kemsing, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
The cost reflects the work involved, not guesswork. That is why we ask about the job first and agree the price before starting.
Why us?
- Quality sealants from Arbo and Everbuild
- Domestic, commercial and hotel work
- ARBOMaster approved applicator
- Neat joints and a tidy finish
See our cost guide and our reviews.
Kemsing: your questions answered
Will you come out to Kemsing?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Kemsing in your area for sand mastic?
Yes, Kemsing is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing.
Are you insured?
Yes. We are fully insured.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will advise.
Do you work for letting agents?
Yes, often. We can quote for several properties at once.
Should I use sand mastic or silicone?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we’ll explain why.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can I choose the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
What affects the quote in Kemsing
Jobs vary more than people expect. What affects the quote:
- The number of rooms or windows
- Mould in or behind the old joints
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
Helping us quote
To help us quote quickly, let us know:
- Photos by email, if that’s easy
- How we’d reach the joints
- The rough size of the job
- The type of property
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 is easy.
Windows and doors in Kemsing
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Knole House (about 2.8 miles south) nearby, there’s older building stock in the area around Kemsing 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.
For landlords with property near Otford station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of St Mary include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in. Managing a site like Kemsing Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Kemsing is about 2 miles north-east of Sevenoaks, in Kent. We provide sand mastic to householders, landlords and businesses in Kemsing. Across Kent, we cover 922 places, and Kemsing is one of them. For nearby work, see our London page (19 miles or so).
Work in TN15 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on High Street, Copperfields Walk and Childsbridge Lane or anywhere close by, our applicators can take on the job. Nearby, we also carry out sand mastic in Cotman's Ash (1 mile north-east), Heaverham (2 miles east), Woodlands (2 miles north-east), Romney Street (2 miles north) and Knatts Valley (2 miles north-east). Larger places within reach include Maidstone (14 miles east), Dartford (9 miles north), Royal Tunbridge Wells (12 miles south), Gravesend (11 miles north-east), Tonbridge (8 miles south) and Northfleet (10 miles north-east).
Around Kemsing
We work in homes and buildings around St Michael's Preparatory School, Knole Academy and Kemsing Down. The nearest railway station is Otford station, roughly 1 mile north-west. Nearby you’ll also find Kemsing Castle Bank (0.5 miles east) and Otford Heritage Centre (1 mile west). Green spaces nearby include Dryhill Nature Reserve.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Crumbling stone or brickwork round the window
- Decisions on consent for listed homes
- Decayed frames that need repair
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Where we work in Kemsing
- Brick reveals
- Sash and case windows
- Period & listed homes
- Timber door frames
- Tenement windows
- Stone surrounds
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.