Kent · England
Window & door mastic in Hartley, Kent
Problem with your window and door frames in Hartley? We remove the old material, prepare the joints and seal them properly.
- Gaps between the frame and the inside reveal
- Cracked or shrunken mastic around the frame
- Rushed sealant from a window installation
Aftercare tips
To keep the joints looking good and working properly:
- Paint up to the joint, not over it
- Ventilate rooms so frames don’t stay wet inside
- Keep timber frames painted
- Check the mastic once a year
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Window mastic in Hartley, done properly
A cold draught around a closed window often comes from the frame edge. Resealing that joint can make a room feel noticeably less draughty. Where the air is getting in through the window itself, we’ll say so. Common call-outs are for mastic that has split away from the wall and draughty joints inside around the window, on composite doors, timber windows & doors and window sills.
Homes in small places like Hartley often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Hartley (TN17)
- Region
- Kent
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
Sealant isn’t the answer to every problem, and we will tell you before any work starts. It will not solve:
- A failed sealed unit that has misted up
- Soft or decayed wood in the frame
- A sash or casement that will not close properly
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Window sills
- Composite doors
- uPVC windows
- Patio & French doors
- Aluminium frames
- Timber windows & doors
The process
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the job takes a few hours for a few frames, or a day or more for a whole house in most cases. Somewhere like Hartley needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
- Tell us about any water getting in
Getting a quote
Want a quote for window mastic? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Landlord and commercial work in Hartley
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Hartley, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Hartley: your questions answered
Will you come out to Hartley?
Yes, Hartley is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What guarantee comes with window mastic in Hartley?
All our work, in Hartley and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
Do you work for letting agents?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
Can you do several jobs on one visit?
Yes. Just list everything you need.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
Do you work on first-floor windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Other services in Hartley
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- When we can work, for business premises
- The number and length of the joints
- The old material and how stubborn it is
- How easy the joints are to reach
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- A few pictures by email, if you can
- How many joints, rooms or windows are involved
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, call 0345 464 0079 or send us an email.
Hartley homes and the weather
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. Historic houses like Scotney Castle (about 4.4 miles west) are a reminder that the area around Hartley has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For site and facilities teams at buildings such as High Weald Academy, the mastic around its windows and doors needs looking after like any other building’s. Historic houses such as Scotney Castle, about 4.4 miles west, show how far back building around Hartley goes.
Hartley is about 8 miles south-east of Paddock Wood, in Kent. Hartley gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Hartley is one of 922 towns and villages in Kent we cover for window mastic. There’s also a page for Crawley, about 30 miles away.
We cover every part of TN17 for window mastic and the streets around it. That includes homes and businesses on Hartley Road, Campion Crescent and Hartley Court Gardens. We also cover Swattenden (1 mile east), Cranbrook (1 mile north-east), Baker's Cross (2 miles north-east), Gill's Green (2 miles south) and Beal's Green (2 miles south). We also work in nearby towns such as Maidstone (13 miles north), Royal Tunbridge Wells (11 miles west), Tonbridge (13 miles north-west), Kings Hill (14 miles north), Foley Park (14 miles north) and Paddock Wood (8 miles north-west).
Near you in Hartley
Typical jobs here are in homes near Crane Valley. Other landmarks nearby include Benenden Hospital (4.7 miles east) and Sissinghurst Castle (3.8 miles north-east).
How the job changes by surface
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so they get particular care.