Kent · England
Window & door mastic in Platt, Kent
Window and door frames in Platt need attention? We cut out the old, prepare the joints and apply the right sealant.
- Untidy mastic left by window fitters
- Leaking joints at the ends of sills
- Gaps between the frame and the inside reveal
Platt questions
Will you come out to Platt?
Yes. Platt is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you do window mastic in Platt?
Yes, Platt is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can I add another job to the visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that’s a different fix, and we’ll say so.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How we handle window mastic in Platt
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. So the sealant has to stretch and recover, which is why we use a low-modulus product. We are often asked to deal with damp patches on the reveal after heavy rain and cracked sealant at the sill ends, on composite doors, aluminium frames and window sills.
Around Platt, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Platt (TN15)
- Region
- Kent
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Platt
More services for Platt
What affects the quote in Platt
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
- How much there is to do
- How many rooms, windows or areas are involved
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- If someone has resealed it before
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or drop us an email.
Work for landlords, hotels and businesses
If you manage several properties in or around Platt, several properties can go on one quote. Send us the addresses and the work at each.
We work for landlords and agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
How it works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the job takes a morning for a couple of windows and a door for a typical job. In a small place like Platt, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
Get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Related advice
Common problems we fix in Platt
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
It’s worth asking for a quote if you see:
- White mastic on grey or black frames
- Old mastic that has gone black or come away
- Leaking joints at the ends of sills
- Gaps between the frame and the inside reveal
Managing a site like Platt Church of England Voluntary Aided Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- How the colour is chosen
- Whether they’re fully insured
- Whether all the old sealant comes out first
- What product goes in the joint
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
What sealant work can’t fix
We will always be straight with you, so here’s what sealant cannot fix:
- Condensation trapped between the panes
- A frame that has rotted at the joint
- Draughts through the window seals rather than the frame
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Composite doors
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Window sills
- Patio & French doors
How the job changes by surface
Patio & French doors
Water at the foot of a door frame isn’t always the mastic: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
Windows and doors in Platt
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. With historic houses such as Old Soar Manor (about 1.9 miles south) nearby, there’s older building stock in the area around Platt as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Letting a property close to Borough Green & Wrotham station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. For an older house near a landmark such as Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Platt is about 6 miles east of Sevenoaks, in Kent. We provide window mastic to householders, landlords and businesses in Platt and nearby. Platt is one of 922 towns and villages in Kent we cover. There’s also a page for London, about 23 miles away.
Postcode districts we cover here for window mastic: TN15. If you need window mastic at a property on St Mary's Close, Grange Road and Platt Common or anywhere close by, our applicators can take on the job. Neighbouring places we cover for window mastic include Comp (1 mile south-east), Borough Green (1 mile west), Crouch (1 mile south-west), Wrotham Heath (1 mile north-east) and Basted (1 mile south-west). Further out, we also cover Maidstone (9 miles east), Dartford (12 miles north-west), Sevenoaks (6 miles west), Royal Tunbridge Wells (11 miles south), Gravesend (10 miles north) and Tonbridge (7 miles south).
What’s near Platt
In Platt, that means homes and buildings near Wrotham School, The Blue Anchor pub and Wrotham School and the streets around them. The nearest railway station is Borough Green & Wrotham station, about 0.9 miles west of the centre. Other landmarks nearby include Ightham Court (1.8 miles west) and Beechin Wood Archery Museum (under half a mile south-east).