Greater London · England
Window Mastic in Shooter's Hill
Professional window mastic in and around Shooter's Hill, with old sealant always removed completely.
- Gaps where the sill meets the wall
- Old mastic that has gone black or come away
- Cracked or shrunken mastic around the frame
What we do, step by step
There isn’t much for you to do on the day. Show us the job and we will take it from there. The work itself takes a few hours for a few frames, or a day or more for a whole house from start to finish. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Shooter's Hill. A visitor permit or a nearby bay makes the visit run more smoothly.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
- Mention any sign-in or site rules at work premises
Getting a quote
Want a quote for window mastic? Please phone 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
How we handle window mastic in Shooter's Hill
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. If you’re dealing with hard, cracked sealant around windows and cold air getting in at the frame edge, we can help.
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 Shooter's Hill is something to talk through when you book.
All our work is covered by a one-year guarantee.
- Place
- Shooter's Hill (SE18, SE9, DA16)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Shooter's Hill
Also in Shooter's Hill
Your questions about window mastic in Shooter's Hill
Do you work for landlords with property near Falconwood station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Do you cover Shooter's Hill for window mastic?
Yes, Shooter's Hill is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can you get sealant to suit coloured frames?
Yes, in most cases. Mention the frame colour when you ask for a quote and we will use the nearest match.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What does window mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant won’t 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
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Where we work in Shooter's Hill
- uPVC windows
- Composite doors
- Window sills
- Timber windows & doors
- Aluminium frames
- Patio & French doors
How the job changes by surface
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.
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. If we find rot, we will tell you before going ahead, as a joiner will need to deal with it.
Why it’s worth doing now in Shooter's Hill
Running fresh sealant over the old joint is tempting, but new sealant cannot bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why choose Mr Mastic in Shooter's Hill
- You choose the colour before work begins
- ARBOMaster approved applicator
- Colour picked to suit the job
- Any old sealant cut out fully, not covered over
Read what affects the cost or what customers say.
Frames and glazing around Shooter's Hill
Historic houses like Eltham Palace (about 1.7 miles south-west) are a reminder that the area around Shooter's Hill has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Shooters Hill Sixth Form College? Then the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near Christ Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Shooter's Hill is about 1 mile south-west of Plumstead, in Greater London. Across the SE18 area, we cover window mastic for homes and businesses. Across Greater London, we cover 764 places, Shooter's Hill among them. You can also see our page for London, roughly 7 miles from Shooter's Hill.
Every address in SE18, SE9 and DA16 is covered for window mastic, from the main roads to the quietest streets. Local streets include Brent Road, Dover Road and Kinlet Road, and we cover them all. We also cover the places around Shooter's Hill: Kidbrooke (1 mile west), Well Hall (1 mile south-west), East Wickham (1 mile east), Avery Hill (1 mile south) and Plumstead (1 mile north-east). Larger places within reach include London (7 miles west), City of Westminster (10 miles west), Marylebone (10 miles west), Kensington (12 miles west), St Pancras (9 miles north-west) and Shoreditch (7 miles north-west).
Landmarks near Shooter's Hill
In Shooter's Hill, that means homes and buildings near The Bull Public House, Eaglesfield Park and Deansfield Primary School and the streets around them. The nearest railway station is Falconwood station, about 0.9 miles south-east of the centre. Other landmarks nearby include Gallions Reach Shopping Park (2.9 miles north) and Greenwich Castle (3 miles west). Green spaces nearby include Summer Hill and Birdbrook Road Nature Reserve.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Keeping the joints in good condition
Looking after new joints is easy:
- Clean frames with a soft cloth and soapy water
- Ventilate rooms so frames do not stay wet inside
- Don’t use solvent cleaners on the joint
- Avoid blasting the frames with a pressure washer
Try not to touch the new joint while it cures, following the cure time we give you. Do not point a pressure washer at the joints.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
When to call us in Shooter's Hill
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. When that sealant fails, water gets into the wall or under the frame.
These are the problems we are asked about most:
- Cracked internal joints between frame and plaster
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
- Black, perished sealant on frames
Letting a property close to Falconwood station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Before you book anyone
- Whether VAT is included
- How hidden problems are handled
- When the joint can take water or movement
- Whether they’re fully insured