Kent · England
Window & door mastic in Westwood, Kent
Mastic around window and door frames, sills and patio doors in Westwood, with a 12-month guarantee on every job. Call for a quick quote.
- Draughts coming in around windows and doors
- Leaking joints at the ends of sills
- Old mastic that has gone black or come away
Work for landlords, hotels and businesses
For anyone letting property in or around Westwood, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
How we handle window mastic in Westwood
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on timber windows & doors, aluminium frames and uPVC windows, and the jobs we see most are untidy mastic left by window fitters and mastic that has split away from the wall.
Mastic can only go onto a dry, clean joint, so window work in Westwood is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee, large or small.
- Where
- Westwood (DA13, DA2)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Places near Westwood
More services for Westwood
Leave it or put it right?
A quick bead over the top of old mastic looks like an easy fix, but new sealant cannot bond to old, crumbling mastic. It peels before long, and water still gets in behind. The old mastic has to come out. Around Westwood, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why Westwood customers choose us
- Any old sealant cut out fully, not covered over
- Every job guaranteed for a year
- Approved under the ARBOMaster scheme
- Colour picked to suit the job
Aftercare tips
After the cure time, these simple habits help:
- Check the mastic once a year
- Keep solvents and bleach off the sealant
- Ventilate rooms so frames do not stay wet inside
- Repaint timber before it’s bare
Most silicone sealants won’t take paint, so if you’re planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
What we can’t put right
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Faulty window hardware
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Window sills
- Timber windows & doors
- Patio & French doors
- Aluminium frames
- Composite doors
- uPVC windows
How it works
The work is kept neat and contained to the area we’re working on, so you can carry on as normal. The job usually takes a few hours for a handful of frames, longer for a whole house, and we explain the cure time before we leave. In a small place like Westwood, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
How to prepare
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any previous sealing or DIY attempts
How to get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Related advice
What affects the quote in Westwood
Every job gets its own quote. These are the things that affect it:
- Working hours on commercial sites
- The size of the job
- Mould in or behind the old joints
- Which sealant suits the joint
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The problem you’ve noticed
- Where the job is, and your postcode
- The rough size of the job
- Pictures of the joints, sent by email
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, ring 0345 464 0079 or email us.
FAQs for Westwood
Is Westwood within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near Longfield station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
How long does it take to reseal the windows on a house?
A handful of frames is a short visit. You’ll get a timescale with the quote.
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. Removing the old sealant completely is the only lasting way.
Does the work come with a guarantee?
Yes, with our 12-month guarantee. A yearly look at the joints helps them last.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we’ll quote it together.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
What do you need from me for a quote?
Let us know what needs doing and where. If we need more, we will ask.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
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 fails, we can still redo it.
Westwood homes and the weather
Historic houses like Cobham College (about 4.6 miles east) are a reminder that the area around Westwood has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Longfield station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. In the older streets around Church of Saint Mary Magdalene, the joint between an old wall and a newer frame is normally the first place rain gets in. Schools such as Bean Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Westwood is about 3 miles south of Swanscombe, in Kent. Westwood gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 922 towns and villages across Kent, from the larger towns to small villages. We also work in London, about 18 miles from Westwood.
All of DA13 and DA2 is covered for window mastic, from the main roads to the quietest streets. Streets in the area include Westwood Road and Highcross Road. Other places close to Westwood include Grubb Street (1 mile south-west), Green Street Green (1 mile west), Bean (1 mile north-west), St Margarets (2 miles west) and Darenth (2 miles west). We also work in nearby towns such as Maidstone (14 miles south-east), Dartford (4 miles north-west), Sevenoaks (10 miles south-west), Gravesend (4 miles east), Tonbridge (15 miles south) and Northfleet (3 miles north-east).
What’s near Westwood
We work in homes and buildings around Longfield Academy, Longfield Chalk Bank and Railway Tavern. The nearest railway station is Longfield station, about 1 mile south. Nearby you’ll also find Stone Museum of Geology (3.3 miles north-west) and Bluewater (2.3 miles north-west). Not far away are Sawyers Lake.