Greater London · England
Window & door mastic in Woodside, Greater London
Mastic around window and door frames, sills and patio doors in Woodside, with a 12-month guarantee on every job. Ask us for a quote.
- White mastic on grey or black frames
- Cracked or shrunken mastic around the frame
- Rushed sealant from a window installation
Surface by surface
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. It comes out, deep gaps get backing rod and the joint is resealed.
Composite doors
Front doors take the weather head on, and the top and bottom corners tend to fail first. We pay most attention there.
About our window mastic in Woodside
From a single sill to a whole house of windows, the work is priced before anything is done. Just phone 0345 464 0079 or drop us an email and tell us how many frames there are and how they’re reached. We work on timber windows & doors, uPVC windows and aluminium frames, and the jobs we see most are white mastic on grey or black frames and whistling draughts around closed windows.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking, and access in Woodside is something to talk through when you book.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Woodside (CR0, SE25, CR9)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
To keep the joints looking good and working properly:
- Keep paint and stain on wooden frames in good order
- Check the mastic once a year
- Clean frames with a soft cloth and soapy water
- Ventilate rooms so frames do not stay wet inside
Check the drainage slots in the frames are not blocked, so water can run away instead of sitting against the joint.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Signs you need window mastic in Woodside
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, while a joint packed solid cannot stretch. Backing rod sets the right depth.
These are the problems we’re asked about most:
- Rushed sealant from a window installation
- Cracked internal joints between frame and plaster
- Leaking joints at the ends of sills
- Cracked or shrunken mastic around the frame
If you let a flat or house near Norwood Junction station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before booking anyone
- What preparation is included
- Are they insured?
- How the colour is chosen
- How hidden problems are handled
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Quotes for window mastic in Woodside
For a quick quote, just ask. The main things that affect it are:
- Working hours on commercial sites
- The number of rooms or windows
- The type of sealant required
- How much old sealant there is and how hard it is to remove
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.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Whether it has been sealed before
- Access, such as stairs, a lift or height
- The rough size of the job
- The type of property
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Woodside homes and the weather
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking. 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.
In the older streets around Church of St Luke, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as St Thomas Becket Catholic Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Woodside is about 6 miles south of New Cross, in Greater London. Every kind of property in Woodside is covered for window mastic, old or new, large or small. The work is guaranteed for a year. Across Greater London, we cover 764 places, and Woodside is one of them. For nearby work, see our London page, about 8 miles away.
Postcode districts we cover here for window mastic: CR0, SE25 and CR9. Local streets include Long Lane, Tudor Road and Coe Avenue. We also cover Ashburton (1 mile south), Addiscombe (1 mile south), Shirley Oaks (1 mile south-east), Monks Orchard (1 mile south-east) and Shirley (1 mile south-east). We also work in nearby towns such as London (8 miles north), City of Westminster (9 miles north-west), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
Landmarks near Woodside
Typical jobs here are in homes near The Beehive pub, Oasis Academy Shirley Park and Ashburton Park and the streets around them. Woodside’s nearest station is Norwood Junction station, about 0.7 miles north-west. Well-known places in the area include Whitgift Centre (1.7 miles south-west) and Crystal Palace Museum (2.2 miles north). Not far away are Bramley Bank and Duppas Hill.
Places near Woodside
Other services in Woodside
Why deal with it now?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Woodside, the repair is bigger than a sealant job.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why book with us
- Colour agreed with you before work begins
- Over 20 years’ experience
- Colour picked to suit the job
- One-year guarantee on every job
How it works
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a few frames, or a day or more for a whole house. In a London area like Woodside, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Clear the area around the work
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
Getting a quote
For window mastic in Woodside, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Advice
Woodside questions
Do you work for landlords with property near Norwood Junction station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Is parking a problem for a job in Woodside?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
How long does it take to reseal the windows on a house?
A few frames take a few hours, while a whole house takes longer. You will get a timescale with the quote.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Can you reach windows above the ground floor?
Yes, where they can be reached safely. Let us know about access when you ask for a quote and we will plan for it.
Does the work come with a guarantee?
Yes, for 12 months. A yearly look at the joints helps them last.
Can I paint over the new sealant?
Not normally, if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses.