Greater London · England
Window & door mastic in Widmore, Greater London
We cover Widmore for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Mastic that’s falling out in pieces
- A bead that does not match the frame
- Mastic that has split away from the wall
About our window mastic in Widmore
The new joint does not have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. If you’re dealing with cracked internal joints between frame and plaster and hard, cracked sealant around windows, we can help, on window sills, aluminium frames and composite doors alike.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking.
Big or small, it’s backed by our one-year guarantee.
- Where
- Widmore (BR1, BR2, BR7)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for window mastic in Widmore
You will get a clear quote before any work starts. It’s based on:
- Access and height
- How much there is to do
- Working hours on commercial sites
- The product the joint needs
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
Helping us quote
To make quoting easier, let us know:
- Where the job is, and your postcode
- Photos by email, if that is easy
- How we’d reach the joints
- The problem you’ve noticed
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and send you a clear quote.
Do you need window mastic in Widmore?
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
Any of these means the joints need attention:
- Black, perished sealant on frames
- Cracked internal joints between frame and plaster
- Rushed sealant from a window installation
- Gaps where the sill meets the wall
Managing a site like Bullers Wood School for Boys? Then the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- What happens if the job turns out different
- Whether VAT is included
- What product goes in the joint
- Whether they seal over old material or remove it
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
- Clean frames with a soft cloth and soapy water
- Do not use solvent cleaners on the joint
- Ventilate rooms so frames do not stay wet inside
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
Different surfaces, different methods
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that without cracking.
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. We match the colour to the frame.
Why it’s worth doing now in Widmore
Getting a straight, even bead on an outside frame takes practice, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. In a flat in Widmore, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What you get with us
- You choose the colour before work begins
- Old sealant always removed completely
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
Take a look at what affects the cost or customer reviews.
Landlords, agents and businesses in Widmore
Landlords and agents in Widmore can book us as well as householders. Resealing between tenancies keeps a property looking cared for.
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.
Widmore homes and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. 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 Bickley station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. As a London address, Widmore can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Widmore is about 1 mile east of Bromley, in Greater London. Every kind of property in Widmore can book us for window mastic, old or new, large or small. The work is guaranteed for a year. We cover 764 towns and villages across Greater London, large and small. For nearby work, see our London page (9 miles or so).
All of BR1, BR2 and BR7 is covered for window mastic, from the main roads to the quietest streets. That includes homes and businesses on Golf Road, The Avenue and Canon Road and the roads around them. We also cover Bickley (1 mile north), Elmstead (1 mile north), Chislehurst (1 mile north-east), Bromley (1 mile west) and Sundridge (1 mile north-west). We also work in nearby towns such as London (9 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles north-west), St Pancras (11 miles north-west) and Shoreditch (10 miles north-west).
Around Widmore
Typical jobs here are in homes near Bird In Hand Public House, St George's and Jubilee Country Park, among other places. There’s a railway station in Widmore itself: Bickley station. Well-known places in the area include Bridgeways Day Hospital (1 mile south) and The Mall (1.3 miles west). For a walk, there’s Summer Hill and The Tarn.
FAQs for Widmore
Do you cover Widmore for window mastic?
Yes. We work across London and the South East, and Widmore is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Is parking an issue for window mastic in Widmore?
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.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Do you seal inside as well as outside?
Yes. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
What happens on the day
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. It usually takes a morning for a couple of windows and a door. In a London area like Widmore, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.