Greater London · England
Cranham Sand Mastic
Our applicators work in Cranham on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Gaps round a timber door in stone or brick
- Open joints round the window box
- Crumbling sand mastic round a window
Sand mastic in Cranham
On many period windows, sand mastic looks right and suits the building. Newer frames generally get a flexible sealant instead, and we will talk through which suits your home. If you are dealing with open joints round the window box and failed mastic on an exposed elevation, we can put it right, whatever the surface.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Cranham is something to talk through when you book.
Our work is backed for twelve months, in Cranham and everywhere else we cover.
- Place
- Cranham (RM14)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Do you need sand mastic in Cranham?
Paint, silicone or cement used over old mastic causes problems. They do not suit the joint, and they generally need raking out.
Most people get in touch when they notice something like this:
- Gaps round a timber door in stone or brick
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
- Old cement repairs round a window that have failed
As a London address, Cranham can be tricky for parking: let us know about parking bays, permits or a driveway.
What to look for in a quote
- What preparation is included
- Whether VAT is included
- Which sealant they’ll use, and why
- Is the old sealant removed completely?
Windows and doors in Cranham
With historic houses such as Hare Hall (about 3 miles north-west) nearby, there’s older building stock in the area around Cranham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking.
Homes close to St Luke's Cranham include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Hall Mead School, the mastic around its windows and doors needs looking after like any other building’s.
Cranham is about 2 miles east of Hornchurch, in Greater London. Cranham gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. 764 places in Greater London are on our list. Chelmsford is on our list too, around 15 miles away.
Postcode districts we cover here for sand mastic: RM14. If you need sand mastic at a property on Avon Road, Moor Lane and Front Lane or a nearby road, our applicators can take on the job. If you’re just outside Cranham, we cover Upminster (1 mile west), Puddle Dock (1 mile east), Upminster Bridge (1 mile west), North Ockendon (2 miles south-east) and Emerson Park (2 miles north-west). Larger places within reach include Shoreditch (15 miles west), Walthamstow (13 miles west), Hoxton (15 miles west), Whitechapel (15 miles west), Orpington (14 miles south-west) and Plaistow (11 miles west).
What’s near Cranham
In Cranham, that means homes and buildings near The James Oglethorpe Primary School, The Crumpled Horn pub and St. Andrew's Park. The closest station to Cranham is Upminster station, about 0.7 miles west of the centre. A little further out are The Mercury Mall (3.7 miles west) and Upminster Tithe Barn Museum of Nostalgia (0.6 miles north-west). For a walk, there’s Cranham Brickfields.
Honest limits
We will always be straight with you, so here’s what new sealant will not do:
- Crumbling stone or brickwork round the window
- Rotten sashes, sills or window boxes (a joiner’s job)
- Planning or listed building consent (your local planning authority decides)
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Brick reveals
- Sash and case windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Tenement windows
Landlord and commercial work in Cranham
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. Several properties can go on one quote.
Leave it or put it right?
If you’re redecorating, renew the mastic first. Painting over failed mastic doesn’t seal it, and the new mastic is traditionally left unpainted. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Cranham, the repair is bigger than the sealant job would have been.
What it costs depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before work begins, so you know where you stand.
Why us?
- Fully insured
- Neat joints and a tidy finish
- Homes, businesses and hotels
- 4.9 on Google from 180+ five-star reviews
See what affects the cost or our reviews.
Nearby places to Cranham
Also in Cranham
FAQs for Cranham
Can you help a landlord with a rental near Upminster station?
Yes. We work for landlords and letting agents as well as householders. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Can parking be tricky for a visit in Cranham?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
What guarantee comes with the work?
All our work has a one-year guarantee.
Where are you based?
We work from Crawley. Our applicators cover Cranham, along with the rest of our area.
Is consent needed for window work on a listed home?
Your local planning authority is the one to ask. They’ll tell you if consent is needed.
Do you come to Cranham?
We do. Cranham is part of the area we cover.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Can I do it myself?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
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.
How we quote for sand mastic
The price is agreed before any work begins. It’s based on:
- How much there is to do
- How many rooms, windows or areas are involved
- The type of sealant required
- Any mould that needs treating
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and send you a clear quote before work begins.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Whether it’s a home or a business
- Roughly how big the job is
- How we’d reach the joints
- Any previous sealing or DIY work
For sand mastic in Cranham, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
What happens on the day
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and tidy away. Most jobs take a few hours for a single window, longer for several. In Cranham, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
Getting a quote
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before any work starts.