Greater London · England
Window & door mastic in Cranbrook, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in Cranbrook and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracked or shrunken mastic around the frame
- Rain getting in at the frame or under the sill
- Sealant in the wrong colour for the frame
Quotes for window mastic in Cranbrook
The price is agreed before any work begins. It takes into account:
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- The number and length of the joints
Doing several joints on one visit usually makes better use of the time than several visits. We will give you a clear price for the lot.
What to tell us for a quote
What to tell us when you ask for a quote:
- Where the property is
- The type of property
- Roughly how big the job is
- What’s wrong with the joints now
Need a quote? Please call 0345 464 0079 or email us with a few details. We’ll explain what we’d do and send you a clear quote before we start.
About our window mastic in Cranbrook
The new joint does not have to be white. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. If you are dealing with white mastic on grey or black frames and cold air getting in at the frame edge, we can put it right, whatever the surface.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Cranbrook as anywhere.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Where
- Cranbrook (IG1, IG2, E12)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
How the visit works
We keep the work tidy and contained to the joints we are treating. The job generally takes a few hours for a handful of frames, longer for a whole house, and we tell you how long to leave it before we go. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Cranbrook. 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.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Tell us about any water getting in
- Keep children and pets away from the work area
- Let us know about parking restrictions
Ask for a quote
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Advice
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Honest limits
It helps to know what we can’t do too:
- Faulty window hardware
- Draughts through the window seals rather than the frame
- Rotten timber, which needs a joiner first
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Where we work in Cranbrook
- Timber windows & doors
- uPVC windows
- Composite doors
- Window sills
- Aluminium frames
- Patio & French doors
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep drainage slots and sill grooves clear
- Check the mastic once a year
- Paint up to the joint, not over it
- Keep paint and stain on wooden frames in good order
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just phone 0345 464 0079 or drop us an email.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Nearby places to Cranbrook
What else we do in Cranbrook
What we are called out for in Cranbrook
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid cannot stretch. That’s what backing rod is for.
Common reasons people contact us include:
- Cracked sealant at the sill ends
- Rain getting in at the frame or under the sill
- Draughty joints inside around the window
- Draughts coming in around windows and doors
For an older house near a landmark such as St Clement's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
What your quote should include
- What insurance they hold
- Whether they seal over old material or remove it
- Whether VAT is included
- What preparation is included
What window mastic looks like in Cranbrook
With historic houses such as Valentines Mansion (about 0.5 miles north) nearby, there’s older building stock in the area around Cranbrook as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like The Ursuline Academy Ilford? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Ilford station, renewing tired window mastic between tenants heads off draught and damp complaints.
Cranbrook is about 2 miles north-east of Forest Gate, in Greater London. We provide window mastic to homes and businesses in Cranbrook, as part of our work across Greater London. Our Greater London coverage runs to 764 places, and Cranbrook is one of them. For nearby work, see our London page, about 8 miles away.
Every address in IG1, IG2 and E12 is covered for window mastic, from the main roads to the quietest streets. You’ll find streets such as Mill Road, York Road and Prior Road, and we cover them all. We also cover the places around Cranbrook: Ilford (1 mile south-east), Redbridge (1 mile north-west), Gants Hill (1 mile north-east), Little Ilford (1 mile south) and Manor Park (1 mile south). We also work in nearby towns such as London (8 miles south-west), City of Westminster (10 miles west), Marylebone (10 miles west), Kensington (12 miles west), St Pancras (8 miles west) and Shoreditch (7 miles south-west).
Local landmarks in Cranbrook
Around Cranbrook, our work takes us to homes and buildings near Highlands Primary School, Great Spoon of Ilford pub and Valentines Park and the streets around them. Cranbrook’s nearest station is Ilford station, about 0.5 miles south-east of the centre. A little further out are Redbridge Museum (0.7 miles south-east) and Wanstead Hospital (2.1 miles north-west). For a walk, there’s Ripple Nature Reserve and Hollow Pond.
Cranbrook: your questions answered
I let a flat near Ilford station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Is parking an issue for window mastic in Cranbrook?
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.
Will new mastic stop draughts?
Yes, if the air is getting in around the frame. If it’s coming through the window seals, we will tell you.
Do you have insurance?
Yes, we’re fully insured.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Where are you based?
Mr Mastic is based in Crawley. We cover Cranbrook and the rest of Greater London.
How long does it take to reseal the windows on a house?
It depends on access, the old mastic and the size of the frames. You will know the timing when we quote.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.