Kent · England
Sand Mastic in Otham
Specialist sand mastic for Otham: careful preparation, the right product and tidy work. Call for a quick quote.
- Draughts and rain around sash boxes
- Open joints round the window box
- Window mastic to renew ahead of painting
Sand mastic in Otham
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. If you are dealing with tired mastic found when preparing windows for paint and draughts and rain around sash boxes, we can put it right, whatever the surface.
Homes around Otham range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Otham (ME15, ME17)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Nearby places to Otham
Other services in Otham
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We work for landlords and agents as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
Quotes for sand mastic in Otham
We do not publish a price list, because jobs vary so much. What we look at:
- The product the joint needs
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Access, such as stairs, a lift or height
- Whether it has been sealed before
- Where the property is
- The problem you’ve noticed
To get a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Otham questions
Can you do sand mastic in Otham?
Yes, Otham is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Will you come out to Otham?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Otham, along with the rest of our area.
What do you need from me for a quote?
A short description and the location. If we need more, we will ask.
Should I use sand mastic or silicone?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels.
Can sand mastic be painted?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
How it works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes anything from a few hours to a full day, depending on how many windows. A visit to Otham is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Clear items away from the joints we are working on
- Tell us about any water getting in
- Let us know about stairs, lifts or work at height
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Read more
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Sashes that need overhauling
- Timber that has rotted
- Crumbling stone or brickwork round the window
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Period & listed homes
- Tenement windows
- Brick reveals
- Timber door frames
- Sash and case windows
- Stone surrounds
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Clear gutters so water doesn’t pour onto the windows
- Ask a joiner to look at soft timber first
- Sort the mastic before the decorators arrive
- Inspect the joints round the windows every year or so
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
What the job involves on each surface
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
What sand mastic looks like in Otham
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Stoneacre (about 0.6 miles north-east) nearby, there’s older building stock in the area around Otham as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Bearsted station? Then any sash windows need sound mastic to keep draughts and rain out. Schools such as Senacre Technology College are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. In the older streets around St Nicholas's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Otham is about 2 miles south-east of Maidstone, in Kent. We carry out sand mastic for homes and businesses in Otham and the surrounding area. Our area takes in 922 places across Kent. Our London page covers work nearby, about 33 miles away.
We cover every part of the ME15 and ME17 postcode area for sand mastic. If you need sand mastic at a property on Church Road, Spartall Drive and Ellis Field or anywhere close by, our applicators can take on the job. We also cover Willington (1 mile north-west), Park Wood (1 mile south-west), Langley (1 mile south-east), Shepway (1 mile north-west) and Caring (1 mile north-east). We also work in nearby towns such as Ashford (15 miles south-east), Sittingbourne (10 miles north-east), Royal Tunbridge Wells (15 miles south-west), Gravesend (15 miles north-west), Tonbridge (13 miles west) and Faversham (15 miles east).
Near you in Otham
Around Otham, our work takes us to homes and buildings near New Line Learning Academy, Senacre Wood Primary School and Mote Park. The closest station to Otham is Bearsted station, roughly 2.1 miles north. Nearby you’ll also find Kent Fire Brigade Museum (2.4 miles west) and KIMS hospital (2.8 miles north). The countryside around Otham includes Detling Hill.