Kent · England
Longfield Hill Window Mastic
Window mastic for Longfield Hill, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rushed sealant from a window installation
- Cold air getting in at the frame edge
- Mastic that is falling out in pieces
How we handle window mastic in Longfield Hill
There are two joints on most windows. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. We work on timber windows & doors, patio & French doors and uPVC windows, and people most often call us about leaking joints at the ends of sills and black, perished sealant on frames.
In a village or hamlet like Longfield Hill, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Each job carries a 12-month guarantee, large or small.
- Where
- Longfield Hill (DA3)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Longfield Hill
Every job gets its own quote. This is what makes a difference:
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- Any working-time requirements on site
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before work begins.
What to tell us for a quote
To make quoting easier, let us know:
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
If you’re in Longfield Hill and need window mastic, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Also near Longfield Hill
What else we do in Longfield Hill
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Faulty window hardware
- Damp problems in the wall away from the window
- Rotten timber, which needs a joiner first
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Composite doors
- Window sills
- uPVC windows
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Looking after it afterwards
So the new joints stay in good condition:
- Do not use solvent cleaners on the joint
- Do not aim a pressure washer at the joints
- Keep paint off silicone joints
- Make sure the drainage slots aren’t blocked
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just ring 0345 464 0079 or email us.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
What happens on the day
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a morning for a couple of windows and a door and we leave things clean and tidy. For a village or hamlet like Longfield Hill, 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.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Clear the area around the work
- Tell us about access, such as stairs, a lift or high-level joints
- For business premises, tell us about site rules or sign-in
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Read more
Work for landlords, hotels and businesses
Letting agents and landlords in Longfield Hill can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Different surfaces, different methods
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so we pay close attention there.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Questions from Longfield Hill
Do you cover smaller places like Longfield Hill?
Yes. Longfield Hill is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Meopham station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can you quote for more than one area?
Yes. Just list everything you need.
Do you guarantee window mastic?
Yes. Every job comes with our one-year guarantee, and we’re ARBOMaster approved applicators.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Windows and doors in Longfield Hill
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Cobham College (about 2.8 miles east) nearby, there’s older building stock in the area around Longfield Hill as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Istead Rise Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Meopham station? Then renewing tired window mastic between tenants heads off draught and damp complaints. If you live in an older home near Church of St Mildred, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Longfield Hill is about 3 miles south of Northfleet, in Kent. Homes, rented property, offices and hotels in Longfield Hill can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Longfield Hill is one of 922 places in Kent we cover. London is on our list too, around 20 miles away.
Jobs for window mastic in DA3 works the same way as everywhere else we cover. You will find streets such as Main Road, Nurstead Lane and Ryecroft, all of which we cover. We also cover New Barn (1 mile north-west), Hartley (1 mile west), Nash Street (1 mile north-east), Meopham (1 mile south-east) and Longfield (1 mile north-west). Further out, we also cover Maidstone (12 miles south-east), Dartford (6 miles north-west), Sevenoaks (10 miles south-west), Gravesend (4 miles north-east), Tonbridge (13 miles south) and Northfleet (3 miles north).
What’s near Longfield Hill
We work in homes and buildings around Rectory Meadow and Longfield Academy. The closest station to Longfield Hill is Meopham station, about 1 mile east of the centre. A little further out are Stone Castle (4.5 miles north-west) and Gravesham Community Hospital (4 miles north). Green spaces nearby include Sawyers Lake.