Greater London · England
Bexley Riverside Window Mastic
Window mastic in Bexley Riverside from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Rain getting in at the frame or under the sill
- Mastic that has split away from the wall
- Cold air getting in at the frame edge
Window mastic for homes and businesses in Bexley Riverside
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we’ll say so. We work on timber windows & doors, window sills and aluminium frames, and common reasons people get in touch are whistling draughts around closed windows and untidy mastic left by window fitters.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Bexley Riverside is something to talk through when you book.
You get a 12-month guarantee, the same in Bexley Riverside as everywhere else we work.
- Location
- Bexley Riverside (DA8, DA7, DA1)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Keep drainage slots and sill grooves clear
- Clean frames with a soft cloth and soapy water
- Walk round the house once a year and look at the joints
- Do not paint over the silicone
Try not to touch the new joint while it cures, for as long as we advise. Keep jet washers away from the frames.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
FAQs for Bexley Riverside
Do you cover Bexley Riverside for window mastic?
Yes. Our work covers London and the South East, and Bexley Riverside is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Is parking a problem for a job in Bexley Riverside?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used.
I’m a tenant. Can you help?
Yes. Ask your landlord first, and we can send them the quote if that helps.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
Can you do several jobs on one visit?
Yes, we can. More than one area can be quoted together.
Towns and villages near Bexley Riverside
More services for Bexley Riverside
Landlord and commercial work in Bexley Riverside
We work for letting agents and landlords as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Different surfaces, different methods
Composite doors
A composite door generally sits in a plastic outer frame, and the joint around it is sealed like a window. We match the colour to the frame.
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.
Honest limits
We’d rather tell you now than do work that won’t last, so these are the limits:
- Worn gaskets, brush seals or a door that has dropped
- Faulty window hardware
- Damp coming through the wall itself rather than the frame joint
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Window sills
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Composite doors
The process
At the end, we look at the finished work together. The work normally takes a few hours for a handful of frames, longer for a whole house, depending on how much there is to do. In Bexley Riverside, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Keep children and pets away from the work area
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, ring 0345 464 0079 or email us.
Related advice
Signs you need window mastic in Bexley Riverside
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
Look out for these signs:
- Draughty joints inside around the window
- Cracked or shrunken mastic around the frame
- Gaps where the sill meets the wall
- Mastic that’s falling out in pieces
If you let a flat or house near Barnehurst station, renewing tired window mastic between tenants heads off draught and damp complaints.
Comparing quotes
- What the quote includes, VAT included or not
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- How hidden problems are handled
What window mastic looks like in Bexley Riverside
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. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
If you look after a building such as Normandy Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near St Paul's, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Bexley Riverside is about 3 miles north-west of Dartford, in Greater London. Bexley Riverside gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Bexley Riverside is one of 764 towns and villages in Greater London where we work. There’s also a page for London, roughly 12 miles from Bexley Riverside.
All of DA8, DA7 and DA1 is within our area for window mastic, from the main roads to the quietest streets. We cover properties on Mill Road, Hurst Road and Bexley Road. Neighbouring places we cover for window mastic include Northumberland Heath (1 mile north-west), Barnehurst (1 mile south), Erith (1 mile north), North End (1 mile east) and Slade Green (1 mile east). Within a short drive, we also cover London (12 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (12 miles north-west).
Local landmarks in Bexley Riverside
Locally, jobs take us to homes and businesses close to Braeburn Park, The Royal Oak pub and Trinity School. The nearest railway station is Barnehurst station, roughly 0.6 miles south-west of the centre. Other landmarks nearby include Broadway Shopping Centre (1.4 miles south-west) and Erith and District Hospital (0.5 miles north). The countryside around Bexley Riverside includes Wansunt Pit.