Greater London · England
Wennington Window Mastic
Window mastic for Wennington and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Cracked or shrunken mastic around the frame
- White mastic on grey or black frames
- Old mastic that has gone black or come away
How we quote for window mastic
For a quick quote, just ask. The main things that affect it are:
- Access and height
- The number and length of the joints
- How many areas need sealing
- Whether there’s mould to deal with
The cost depends on the amount of work, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What we need to know
When you contact us, it’s useful to know:
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
- Pictures of the joints, sent by email
- Where the property is
We quote each job on its own. Just phone 0345 464 0079 or drop us an email with the details, and photos are welcome.
About our window mastic in Wennington
The new joint does not have to be white. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. Common call-outs are for leaking joints at the ends of sills and black, perished sealant on frames, on timber windows & doors, composite doors and uPVC windows.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, which is when draughts and damp patches appear in homes in Wennington.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Wennington (RM13)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Wennington
More services for Wennington
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Signs you need window mastic in Wennington
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.
Any of these means the joints need attention:
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
- Cracked internal joints between frame and plaster
- Hard, cracked sealant around windows
Wennington is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- Whether all the old sealant comes out first
- Who does the work, and how experienced they are
- What preparation is included
- What the quote includes, VAT included or not
DIY sealant or a professional job?
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.
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 fails, we can still redo it.
Your questions about window mastic in Wennington
Is parking a problem for a job in Wennington?
Parking in Wennington, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Do you work for landlords with property near Rainham (Essex) station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or email us with the details for a clear quote.
Where are you based?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do you have sealant for grey or black windows?
Generally, yes. Mention the frame colour when you ask for a quote and we will match it as closely as we can.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Faulty window hardware
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before booking.
Surfaces we seal
- Composite doors
- Window sills
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Aluminium frames
Windows and doors in Wennington
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
Letting a property close to Rainham (Essex) station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near St Mary and St Peter's Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Wennington is about 4 miles south of Hornchurch, in Greater London. From the centre of Wennington to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, and Wennington is one of them. For nearby work, see our London page.
All of RM13 is covered for window mastic. Nearby, we also carry out window mastic in Aveley (1 mile east), Hacton (2 miles north), South Ockendon (3 miles east), Upminster Bridge (4 miles north) and Hornchurch (4 miles north). Further out, we also cover London (14 miles west), St Pancras (15 miles west), Shoreditch (13 miles west), Walthamstow (12 miles north-west), Hoxton (13 miles west) and Whitechapel (12 miles west).
Around Wennington
Typical jobs here are in homes near Lennard Arms Inn, Wildspace Conservation Park and Harris Academy Rainham. For rail, the closest station is Rainham (Essex) station, roughly 1.4 miles north-west of the centre. Other landmarks nearby include St George's Hospital (2.8 miles north) and Erith Museum (2.5 miles south-west). The countryside around Wennington includes Rainham Marshes Nature Reserve.
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes anything from an hour or two to a full day, depending on how many frames there are, including the tidy-up. For a job in Wennington, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
Read more
Why deal with it now?
Working on frames from a ladder with a sealant gun is not easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why book with us
- Old sealant always removed completely
- A choice of colours where the product allows
- 20+ years of sealant experience
- We agree the colour with you first
Read what affects the cost and our reviews.