Greater London · England
Barking Sand Mastic
Specialist sand mastic for Barking: careful preparation, the right product and tidy work. Call for a quick quote.
- Failed mastic on an exposed elevation
- Mastic that needs renewing before redecorating
- Mastic dropping out of the joint
What we cannot put right
Sealant isn’t the answer to every problem, and we’ll tell you before we start. Sealant won’t put right:
- Whether work needs listed building consent
- Masonry that needs repairing
- Decayed frames that need repair
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Timber door frames
- Tenement windows
- Brick reveals
Sand mastic in Barking
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties, where modern sealant can look out of place. If you are dealing with mastic round period door frames that has failed and mastic dropping out of the joint, we can help, whatever the surface.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
Our work is backed for twelve months.
- Place
- Barking (IG11, RM9, RM8, E6)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Barking
Can parking be tricky for a visit in Barking?
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.
Can you help a landlord with a rental near Barking station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Where are you based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
When will the new mastic be hard?
Not straight away. It skins first and hardens fully later and we’ll give you an idea for your job.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Are you insured?
Yes. We’re fully insured for domestic and commercial work.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
What sand mastic looks like in Barking
Historic houses like Eastbury Manor House (about 0.1 miles east) are a reminder that the area around Barking has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
As a London address, Barking can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near St Patrick's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Barking is about 9 miles east of London, in Greater London. Homes, rented property, offices and hotels in Barking is covered for sand mastic. The work is guaranteed for a year. Our area takes in 764 places across Greater London, from the larger towns to small villages. For nearby work, see our London page.
All of IG11, RM9, RM8 and E6 is within our area for sand mastic. Sand mastic is available to properties on Eastbury Square, London Road and Church Road and the roads around them. Nearby, we also carry out sand mastic in Loxford (1 mile north-west), Creekmouth (1 mile south), Wallend (1 mile west), East Ham (2 miles west) and Beckton (2 miles south-west). Within a short drive, we also cover London (9 miles west), City of Westminster (11 miles west), Marylebone (11 miles west), Kensington (13 miles west), St Pancras (9 miles west) and Shoreditch (8 miles west).
Local landmarks in Barking
We work in homes and buildings around Mayesbrook Park, Greatfields School and The Barking Dog pub, among other places. The nearest railway station is Barking station, roughly 0.8 miles north-west. Nearby you will also find East End Women's Museum (0.9 miles west) and Barking Community Hospital (less than half a mile north). Green spaces nearby include Ripple Nature Reserve and Hollow Pond.
How the job changes by surface
Timber door frames
Round a period front door, sand mastic gives the right look.
Stone surrounds
Old stone surrounds are often uneven, so the joint varies in width. Sand mastic is shaped by hand to suit.
When to call us in Barking
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
It’s worth asking for a quote if you see:
- Crumbling sand mastic round a window
- Old cement repairs round a window that have failed
- Draughty sash windows at the surround
- Window mastic to renew ahead of painting
For landlords with property near Barking station, any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- How hidden problems are handled
- How the joint is cleaned and prepared
- What product goes in the joint
- Whether they’re fully insured
What we do, step by step
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes a few hours per window, depending on the condition of the joints for a typical job. In a London area like Barking, 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 agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or email us.
Related advice
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Sort the mastic before the decorators arrive
- Do not run silicone over sand mastic
- Get any rot dealt with first
- Look over the window mastic once a year
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber and timber that stays wet can rot.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. 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.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
Why us?
- 12-month guarantee on every job
- An ARBOMaster approved applicator
- Anti-fungal silicone where joints get wet
- Experience in homes, commercial sites and hotels
Take a look at our cost guide and our reviews.