Kent · England
Harrietsham Window Mastic
Mastic around window and door frames, sills and patio doors for Harrietsham, backed by a one-year guarantee. Ask us for a quote.
- Old mastic that has gone black or come away
- A bead that doesn’t match the frame
- Mastic that has split away from the wall
Window mastic in Harrietsham, done properly
Frames and walls don’t move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. If you have gaps between the frame and the inside reveal and a bead that doesn’t match the frame, we can put it right, on timber windows & doors, window sills and composite doors alike.
In a smaller place like Harrietsham, some walls face open ground and catch the full force of the weather. That’s hard on the mastic around frames and sills.
Big or small, you get the same one-year guarantee in Harrietsham and across Kent.
- Where
- Harrietsham (ME17)
- Region
- Kent
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Keep solvents and bleach off the sealant
- Check the mastic once a year
- Use gentle cleaners on frames and sealant
- Make sure the drainage slots aren’t blocked
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Leaks normally show up in wet, windy weather, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Places near Harrietsham
More services for Harrietsham
FAQs for Harrietsham
Is Harrietsham within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Harrietsham station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Can new window sealant be painted?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Do you work on first-floor windows?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can I add another job to the visit?
Yes, we can. More than one area can go on one quote.
Can you match the sealant to my frames?
Yes, in most cases. Tell us the frame colour when you get in touch and we will match it as closely as we can.
How many windows can you do in a day?
A handful of frames is a short visit, while a whole house takes longer. You’ll get a timescale with the quote.
Windows and doors in Harrietsham
Historic houses like Leeds Castle (about 2.2 miles west) are a reminder that the area around Harrietsham has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Catholic Church of the Good Shepherd, the joint between an old wall and a newer frame is usually the first place rain gets in. Rented homes near Harrietsham station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Harrietsham is about 7 miles east of Maidstone, in Kent. From the centre of Harrietsham to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Across Kent, we cover 922 places, and Harrietsham is one of them. For nearby work, see our Chelmsford page.
Every address in ME17 is covered for window mastic. If you need window mastic at a property on Church Road, Station Road and Norris Walk or a nearby road, we can help. If you are just outside Harrietsham, we cover Marley (1 mile east), Pollhill (1 mile west), Chegworth (1 mile west), Sandway (1 mile south-east) and Platt's Heath (1 mile south). Within a short drive, we also cover Maidstone (7 miles west), Ashford (11 miles south-east), Sittingbourne (7 miles north), Faversham (10 miles north-east), Minster (13 miles north-east) and Kings Hill (12 miles west).
Near you in Harrietsham
We work in homes and buildings around Kiln Wood, The Lenham School and The Roebuck Public House, among other places. Harrietsham has its own railway station: Harrietsham station. Well-known places in the area include The Dog Collar Museum (2.1 miles west) and Leeds Castle (2.2 miles west).
What we do, step by step
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. For a job in Harrietsham, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
- Mention any leaks or damp you’ve noticed
Ask for a quote
Every job is quoted individually. Simply call 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Advice
When to call us in Harrietsham
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
Common reasons people contact us include:
- Gaps between the frame and the inside reveal
- Hard, cracked sealant around windows
- Mastic that is falling out in pieces
- Rain getting in at the frame or under the sill
Schools such as Harrietsham Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- How hidden problems are handled
- How much experience the applicator has
- How long the guarantee is
- What the cure time is
What happens if it’s left?
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. In an older home around Harrietsham, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
Why us?
- A 12-month guarantee on all work
- Over 20 years’ experience
- ARBOMaster approved applicator
- Fully insured
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
Landlords, agents and businesses in Harrietsham
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Surface by surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal, and acetoxy silicones are not used, as they can attack some metals. Neutral-cure sealant is the safe choice.
Composite doors
Composite doors are normally hung in an uPVC-type frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.