Kent · England
Sand Mastic in Howt Green
Problem with your window and door surrounds in Howt Green? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Mastic that needs renewing before redecorating
- Cracked mastic round a front door frame
- Cement or filler used on old window joints that has cracked
Sand mastic for homes and businesses in Howt Green
Our applicators renew the sand mastic around sash and case windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. We work on tenement windows, timber door frames and period & listed homes, and common reasons people get in touch are draughty sash windows at the surround and mastic that needs renewing before redecorating.
Around Howt Green, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
All of our work is guaranteed for twelve months.
- Location
- Howt Green (ME9)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need sand mastic in Howt Green
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber, and they generally need raking out.
Most people get in touch after spotting something like this:
- Modern sealant on a period surround
- Old cement repairs round a window that have failed
- Draughts and rain around sash boxes
- Mastic dropping out of the joint
If you live in an older home near Church of St Bartholomew, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before you book anyone
- Who does the work, and how experienced they are
- Whether you can choose the colour
- When the joint can take water or movement
- Is VAT in the price?
The process
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to a full day, depending on how many windows. In a small place like Howt Green, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Keep children and pets away from the work area
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
Related advice
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Surface by surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we will confirm what’s needed.
Howt Green: your questions answered
Is sand mastic in a coastal place like Howt Green any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Is Howt Green within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can you replace silicone on a period window with sand mastic?
Often, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll advise.
What does sand mastic cost?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Howt Green.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
For landlords and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Landlords and letting agents in Howt Green can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Also near Howt Green
Other services in Howt Green
Sand mastic in Howt Green: local notes
Howt Green is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Kemsley station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you look after a building such as Regis Manor Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Howt Green is about 1 mile north-west of Sittingbourne, in Kent. Jobs in Howt Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Howt Green is one of 922 places in Kent we cover. Our Chelmsford page covers work nearby, about 28 miles away.
Jobs for sand mastic in ME9 is quoted and booked the same way as anywhere else. Neighbouring places we cover for sand mastic include Kemsley (1 mile east), Iwade (1 mile north), Sittingbourne (1 mile south-east), Milton Regis (1 mile south-east) and Murston (2 miles south-east). Further out, we also cover Maidstone (11 miles south-west), Whitstable (13 miles east), Faversham (8 miles south-east), Minster (5 miles north-east), Kings Hill (15 miles south-west) and Davington (8 miles south-east).
What’s near Howt Green
Around Howt Green, our work takes us to homes and buildings near Milton Creek Country Park, The Three Hats Inn and Westlands School, among other places. For rail, the closest station is Kemsley station, about 0.6 miles east of the centre. A little further out are Castle Rough (1.4 miles east) and Court Hall Museum (0.9 miles south-east).
What affects the cost of sand mastic
Your quote is based on your job. We take into account:
- Whether there’s mould to deal with
- Whether the work is at height
- How many rooms, windows or areas are involved
- The type of sealant required
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or send us an email and we’ll talk you through it.
What to tell us for a quote
What to tell us when you ask for a quote:
- If someone has resealed it before
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
- A few photos by email, if you can
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Check the mastic when you check the paintwork
- Ask us before painting near the mastic
- Get any rot dealt with first
- Check with your local planning authority if your home is listed
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.