Greater London · England
Window & door mastic in Hook, Greater London
We cover Hook for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Gaps where the sill meets the wall
- Old mastic that has gone black or come away
- Rushed sealant from a window installation
Window mastic in Hook
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that cannot flex, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. Common call-outs are for gaps left after new windows were fitted and whistling draughts around closed windows, across patio & French doors, uPVC windows and timber windows & doors.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
All our work is covered by a one-year guarantee, wherever you are in Greater London.
- Location
- Hook (KT9, KT6, KT10)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
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, then guaranteed for a year.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
What the job involves on each surface
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain cannot run into the wall.
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Nearby places to Hook
Other services in Hook
When to call us in Hook
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
These are the problems we’re asked about most:
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
- Gaps between the frame and the inside reveal
- Rain getting in at the frame or under the sill
For site and facilities teams at buildings such as St Paul's CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- How long to leave it before use
- The length of the guarantee
- How the colour is chosen
- Whether VAT is included
Hook homes and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
Rented homes near Chessington North station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. As a London address, Hook can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Hook is about 2 miles north-west of Ewell, in Greater London. For window mastic in and around Hook, please ring 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Greater London, Hook included. 764 places in Greater London are on our list, large and small. Our London page covers work nearby.
Postcode districts we cover here for window mastic: KT9, KT6 and KT10. If you need window mastic at a property on Elm Road, Moor Lane and Glen Road or anywhere close by, we can help. Hook sits on or near the A243, so getting to you is simple. Other places close to Hook include Ditton Hill (1 mile north), Barwell (1 mile south-west), Long Ditton (1 mile north), Hinchley Wood (1 mile north-west) and Claygate (1 mile west). Within a short drive, we also cover London (13 miles north-east), City of Westminster (12 miles north-east), Marylebone (12 miles north-east), Kensington (10 miles north-east), St Pancras (14 miles north-east) and Shoreditch (15 miles north-east).
What’s near Hook
In Hook, that means homes and buildings near Stokes Field, Shrewsbury House School and Southborough High School. Hook has its own railway station: Chessington North station. Other landmarks nearby include The Ashley Centre (3 miles south-east) and Tolworth Hospital (1.1 miles north-east). Green spaces nearby include Kingston Hill Road area and The Lake.
Your questions about window mastic in Hook
Do you work for landlords with property near Chessington North station?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Is parking a problem for a job in Hook?
Parking in Hook, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that generally means someone at home.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or drop us an email.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we are using and why.
Leave it or put it right?
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. In a flat in Hook, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why us?
- Rated 4.9 stars on Google
- We are fully insured
- Approved under the ARBOMaster scheme
- Every job guaranteed for a year
Read how sealant jobs are priced or our reviews.
Landlord and commercial work in Hook
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
In hotels, rooms out of use cost money, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
How it works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes most of a day for a typical house, less for a few frames from start to finish. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
How to get a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Related advice
When it isn’t the sealant
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Rotten timber, which needs a joiner first
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Hook
- Aluminium frames
- Window sills
- Composite doors
- Patio & French doors
- Timber windows & doors
- uPVC windows