Kent · England
Window & door mastic in Fawkham Green, Kent
Window and door frames in Fawkham Green need attention? We remove the old material, prepare the joints and seal them properly.
- A bead that doesn’t match the frame
- Cold air getting in at the frame edge
- Draughty joints inside around the window
About our window mastic in Fawkham Green
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. Typical jobs include draughts coming in around windows and doors and mastic that has split away from the wall, across composite doors, uPVC windows and window sills.
Outdoor sealant needs dry, clean surfaces, so work on frames around Fawkham Green is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
All of our work is guaranteed for twelve months, in Fawkham Green and everywhere else we cover.
- Location
- Fawkham Green (DA3)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. The threshold and the bottom corners take the most water, so we pay close attention there.
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
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.
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a handful of frames, longer for a whole house, and the area is left clean. For a village or hamlet like Fawkham Green, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
Want a quote for window mastic? Please phone 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Towns and villages near Fawkham Green
What else we do in Fawkham Green
When something else is needed
We will not take on work that will not last, so these are the limits:
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp problems in the wall away from the window
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
What we seal
- Window sills
- Patio & French doors
- uPVC windows
- Composite doors
- Aluminium frames
- Timber windows & doors
Fawkham Green homes and the weather
Historic houses like Lullingstone Castle (about 3.6 miles west) are a reminder that the area around Fawkham Green 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. 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.
Schools such as New Ash Green Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Homes close to Parish Church of Saint Peter and Saint Paul include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near Longfield station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Fawkham Green is about 6 miles south-west of Northfleet, in Kent. Jobs in Fawkham Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Fawkham Green is one of 922 places in Kent we cover for window mastic. There’s also a page for London, roughly 19 miles from Fawkham Green.
Postcode districts we cover here for window mastic: DA3. If you need window mastic at a property on Fawkham Green Road, Brands Hatch Road and Valley Road or a nearby road, our applicators can take on the job. Close by, we work in Speed Gate (1 mile north-west), West Yoke (1 mile east), Ash (1 mile south-east), West Kingsdown (2 miles south-west) and Maplescombe (2 miles west). Further out, we also cover Maidstone (13 miles south-east), Dartford (6 miles north-west), Sevenoaks (7 miles south-west), Gravesend (6 miles north-east), Tonbridge (12 miles south) and Northfleet (6 miles north-east).
Near you in Fawkham Green
Typical jobs here are in homes near Longfield Academy and The Rising Sun pub and the streets around them. Fawkham Green’s nearest station is Longfield station, roughly 2.3 miles north-east of the centre. A little further out are Eynsford Castle (2.9 miles west) and Darent Valley Hospital (4.9 miles north).
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Fawkham Green, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- The number of rooms or windows
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any access issues, like height or stairs
- The address or postcode of the job
- What’s wrong with the joints now
- The rough size of the job
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
FAQs for Fawkham Green
Do you cover smaller places like Fawkham Green?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Longfield station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Is it OK to seal over old sealant?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before we start.
Where do you work from?
We are based in Crawley, and we work across South East England, London and Scotland.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Check the mastic once a year
- Ventilate rooms so frames do not stay wet inside
- Wash the frames with mild soapy water
- Avoid harsh chemicals near the mastic
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.