Kent · England
Window Mastic in Chartham
Mastic around window and door frames, sills and patio doors for homes and businesses in Chartham and across Kent. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- White mastic on grey or black frames
- Damp patches on the reveal after heavy rain
- Cracked or shrunken mastic around the frame
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The work itself takes a morning for a couple of windows and a door. In a small place like Chartham, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
Getting a quote
For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Read more
How we handle window mastic in Chartham
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on window sills, composite doors and timber windows & doors, and the jobs we see most are white mastic on grey or black frames and damp patches on the reveal after heavy rain.
Outdoor sealant needs dry, clean surfaces, so work on frames around Chartham is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
You get a one-year guarantee, the same in Chartham as everywhere else we work.
- Where
- Chartham (CT4)
- Region
- Kent
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Chartham
Other services in Chartham
What the job involves on each surface
Patio & French doors
Not every patio door leak is a mastic problem: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
Chartham questions
Can you help a landlord with a rental near Chartham station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Is Chartham in your area for window mastic?
Yes, Chartham is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Can I paint over the new sealant?
Most silicone cannot be painted. Let us know beforehand, and we will use a paintable product where it suits.
Where are you based?
We work from Crawley. We cover Chartham and the rest of Kent.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
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.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Can you reach windows above the ground floor?
Yes, in most cases. Access is planned before work begins, so mention the height and anything in the way.
Leave it or put it right?
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 a small place like Chartham, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Why Chartham customers choose us
- We never seal over old sealant
- Homes, businesses and hotels
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
Read how sealant jobs are priced or our reviews.
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Soft or decayed wood in the frame
- Damp coming through the wall itself rather than the frame joint
- Draughts through the window seals rather than the frame
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
What we seal
- Timber windows & doors
- Window sills
- Patio & French doors
- uPVC windows
- Composite doors
- Aluminium frames
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Window mastic in Chartham: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Chartham station, renewing tired window mastic between tenants heads off draught and damp complaints. In the older streets around Church of St Mary, the joint between an old wall and a newer frame is generally the first place rain gets in.
Chartham is about 3 miles south-west of Canterbury, in Kent. Every kind of property in Chartham is covered for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. We cover 922 towns and villages across Kent, large and small. Our Chelmsford page covers work nearby, about 40 miles away.
Postcode districts we cover here for window mastic: CT4. You’ll find streets such as Station Road, River Court and The Green, and we cover them all. If you’re just outside Chartham, we cover Shalmsford Street (1 mile south), Mystole (1 mile south-west), Chartham Hatch (1 mile north), Garlinge Green (2 miles south) and Thanington (2 miles north-east). Further out, we also cover Ashford (10 miles south-west), Canterbury (3 miles north-east), Dover (15 miles south-east), Sittingbourne (14 miles north-west), Folkestone (14 miles south-east) and Whitstable (7 miles north).
Local landmarks in Chartham
Typical jobs here are in homes near No Man's Orchard and The Artichoke Inn and the streets around them. Chartham has its own railway station: Chartham station. Other landmarks nearby include Chilham Castle (2.7 miles west) and Whitefriars Shopping Centre (3.1 miles north-east). For a walk, there’s Blean Woods RSPB Reserve.
When to call us in Chartham
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Most people get in touch when they notice something like this:
- Water coming in at the bottom corners of a door
- Cracked internal joints between frame and plaster
- White mastic on grey or black frames
- Mastic that is falling out in pieces
For site and facilities teams at buildings such as Chartham Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- How long the guarantee is
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
- What insurance they hold
Work for landlords, hotels and businesses
Landlords and letting agents in Chartham can book us as well as householders. Sealant work between tenants keeps a property looking cared for.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.