Kent · England
Window & door mastic in Penshurst, Kent
Window mastic in Penshurst from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Water coming in at the bottom corners of a door
- Gaps where the sill meets the wall
- Whistling draughts around closed windows
Window mastic in Penshurst
Around Penshurst we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you’re dealing with draughty joints inside around the window and gaps where the sill meets the wall, we can put it right, on window sills, timber windows & doors and aluminium frames alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Penshurst is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Every job is covered by our one-year guarantee, wherever you are in Kent.
- Place
- Penshurst (TN11)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Wipe condensation off the frames
- Keep timber frames painted
- Keep paint off silicone joints
- Clean frames with a soft cloth and soapy water
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Signs you need window mastic in Penshurst
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, so it comes away long before its time.
If you can see any of these, it’s time to have the joints looked at:
- Mastic that has split away from the wall
- Whistling draughts around closed windows
- Gaps between the frame and the inside reveal
- Rain getting in at the frame or under the sill
If you live in an older home near Church of St John the Baptist, the joint between an old wall and a newer frame is generally the first place rain gets in.
What your quote should include
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
- Are they insured?
- Whether you can choose the colour
When something else is needed
We’ll always be straight with you, so here’s what sealant cannot fix:
- A sash or casement that will not close properly
- A door that needs adjusting, rehanging or new seals
- A frame that has rotted at the joint
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
What we seal
- Window sills
- Aluminium frames
- uPVC windows
- Patio & French doors
- Composite doors
- Timber windows & doors
Penshurst questions
Is Penshurst within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you cover Penshurst for window mastic?
Yes. We work across London and the South East, and Penshurst is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, and for outside work we’ll agree access with you when we book.
Do you work for landlords and businesses?
Yes, regularly. Several properties can be quoted together.
Does the work come with a guarantee?
Yes. Our 12-month guarantee covers every job, inside or out.
Will the old sealant be removed?
Yes, always, and completely. New silicone does not stick to old silicone, so the joint is cleaned back first.
Are you insured?
Yes. Full insurance covers our work.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
Windows and doors in Penshurst
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Penshurst Place (about 0.4 miles north-east) are a reminder that the area around Penshurst 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’s traditional sand mastic.
Rented homes near Penshurst station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Managing a site like Penshurst Church of England Voluntary Aided Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Penshurst is about 5 miles north-west of Royal Tunbridge Wells, in Kent. From the centre of Penshurst to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 922 places in Kent are on our list. There’s also a page for Crawley, about 16 miles away.
Here we cover the TN11 postcode area for window mastic. Window mastic is available to properties on High Street, The Warren and Beckets Field. Close by, we work in Chiddingstone Hoath (2 miles west), Walter's Green (2 miles south), Chiddingstone Causeway (2 miles north), Fordcombe (2 miles south) and Teasley Mead (3 miles south-west). We also work in nearby towns such as Sevenoaks (8 miles north), Royal Tunbridge Wells (5 miles south-east), Tonbridge (5 miles north-east), Kings Hill (12 miles north-east), Paddock Wood (9 miles east) and Southborough (4 miles east).
Local landmarks in Penshurst
Locally, jobs take us to homes and businesses close to Chiddingstone Castle Park and Gardens and The Leicester Arms Hotel, among other places. For rail, the closest station is Penshurst station, roughly 1.8 miles north of the centre. Nearby you will also find Tonbridge Cottage Hospital (4.2 miles east) and Chiddingstone Castle (1.8 miles north-west). Not far away are Broadwater Warren RSPB Reserve and Barden Lake.
Nearby places to Penshurst
More services for Penshurst
The process
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job usually takes anything from an hour or two to a full day, depending on how many frames there are. In a small place like Penshurst, 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.
- 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.
Preparing for the visit
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
Get a quote
Need a quote? Please call 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
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Why it’s worth doing now in Penshurst
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly. In a small place like Penshurst, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What you get with us
- Experience in homes, commercial sites and hotels
- An ARBOMaster approved applicator
- Old sealant always removed completely
- One-year guarantee on every job
What affects the quote in Penshurst
We quote each job individually. These are the things that affect it:
- Which sealant suits the joint
- Whether the work is at height
- The number and length of the joints
- The number of rooms or windows
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear price before work begins.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- How we’d reach the joints
- What’s wrong with the joints now
- A few pictures by email, if you can
- The type of property
To get a quote, ring 0345 464 0079 or drop 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.