Kent · England
Window Mastic in Speed Gate
Window and door frames in Speed Gate need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Whistling draughts around closed windows
- Hard, cracked sealant around windows
- Damp patches on the reveal after heavy rain
Speed Gate: your questions answered
Do you cover Speed Gate for window mastic?
Yes. We work across London and the South East, and Speed Gate is part of that. You can call 0345 464 0079 or email us and tell us what needs doing, and we will send you a clear quote.
I let a flat near Longfield station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
What do you need from me for a quote?
Tell us what needs doing and where, with photos by email if possible. If we need more, we’ll ask.
Can you match the sealant to my frames?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
Can I paint over the new sealant?
Not generally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Window mastic in Speed Gate
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. Common call-outs are for black, perished sealant on frames and whistling draughts around closed windows, across aluminium frames, timber windows & doors and patio & French doors.
Homes in small places like Speed Gate often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Speed Gate (DA3)
- Region
- Kent
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
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.
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Look round the frames every year or so
- Air rooms to keep condensation down around windows
- Don’t use solvent cleaners on the joint
- 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.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. Resealing closes it.
Landlords, agents and businesses in Speed Gate
We work for letting agents and landlords as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Also near Speed Gate
Also in Speed Gate
When it isn’t the sealant
In fairness, some problems need a different trade:
- Draughts through the window seals rather than the frame
- A frame that has rotted at the joint
- Damp coming through the wall itself rather than the frame joint
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
Joints and surfaces we work on
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Window sills
- Patio & French doors
When to call us in Speed Gate
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and timber moves with moisture as well as temperature.
The problems people usually mention when they call are:
- A bead that doesn’t match the frame
- Mastic that is falling out in pieces
- Hard, cracked sealant around windows
- Rain getting in at the frame or under the sill
If you look after a building such as Longfield Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- What product goes in the joint
- Whether all the old sealant comes out first
- What guarantee comes with the work
- What the cure time is
How it works
When we arrive, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take a morning for a couple of windows and a door. In a small place like Speed Gate, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Read more
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
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.
Window mastic in Speed Gate: local notes
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. Historic houses like Lullingstone Castle (about 3.2 miles west) are a reminder that the area around Speed Gate 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.
Lullingstone Castle, about 3.2 miles west, is one of the historic houses in the wider area around Speed Gate. For landlords with property near Longfield station, renewing tired window mastic between tenants heads off draught and damp complaints.
Speed Gate is about 5 miles south of Dartford, in Kent. Jobs in Speed Gate get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Speed Gate is one of 922 towns and villages in Kent we cover for window mastic. There’s also a page for London, about 18 miles away.
Here we cover the DA3 postcode area for window mastic. Neighbouring places we cover for window mastic include Fawkham Green (1 mile south-east), West Yoke (1 mile east), Ash (1 mile south-east), Maplescombe (2 miles south-west) and West Kingsdown (2 miles south). Larger places within reach include Maidstone (13 miles south-east), Dartford (5 miles north), Sevenoaks (7 miles south-west), Gravesend (6 miles north-east), Tonbridge (12 miles south) and Northfleet (5 miles north-east).
Landmarks near Speed Gate
We work in homes and buildings around The Rising Sun pub. The nearest railway station is Longfield station, roughly 2.3 miles north-east. A little further out are Darent Valley Hospital (4.5 miles north) and Eynsford Castle (2.4 miles west).