Greater London · England
South Hornchurch Sand Mastic
Professional sand mastic in and around South Hornchurch, with every bit of old sealant taken out first and a 12-month guarantee.
- Old cement repairs round a window that have failed
- Tired mastic found when preparing windows for paint
- Wind and rain getting in round a sash window
Sand mastic in South Hornchurch, done properly
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. If you have modern sealant on a period surround and mastic worn away on windows facing the weather, we can help, whatever the surface.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking, and access in South Hornchurch is something to talk through when you book.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- South Hornchurch (RM13, RM10, RM12)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for sand mastic
You’ll get a clear quote before any work starts. It’s based on:
- How easy the joints are to reach
- The old material and how stubborn it is
- Working hours on commercial sites
- The number and length of the joints
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Where the property is
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Towns and villages near South Hornchurch
More services for South Hornchurch
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. For a job in South Hornchurch, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Clear items away from the joints we are working on
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
Ask for a quote
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Windows and doors in South Hornchurch
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. Historic houses like Rainham Hall (about 0.9 miles south) are a reminder that the area around South Hornchurch 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.
In the older streets around St John's Parish Church, the joint between an old wall and a newer frame is generally the first place rain gets in. Rented homes near Rainham (Essex) station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
South Hornchurch is about 3 miles south of Romford, in Greater London. Homes, rented property, offices and hotels in South Hornchurch is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. South Hornchurch is one of 764 places in Greater London we cover for sand mastic. You can also see our page for London, about 12 miles away.
Every address in RM13, RM10 and RM12 is covered for sand mastic. If you need sand mastic at a property on Hood Road, Ford Lane and Philip Road or anywhere close by, our applicators can take on the job. We also cover Beam Park (1 mile south-west), Rainham (1 mile south-east), Hornchurch Marshes (1 mile south-west), Dagenham (1 mile north-west) and Elm Park (1 mile north-east). Larger places within reach include London (12 miles west), City of Westminster (15 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (10 miles north-west).
Local landmarks in South Hornchurch
Typical jobs here are in homes near The Bell pub, The Brittons Academy and Beam Valley Country Park. The nearest railway station is Rainham (Essex) station, about 0.9 miles south. Nearby you will also find St George's Hospital (1.9 miles north-east) and The Brewery (3.1 miles north). For a walk, there’s Ingrebourne Marshes.
What sealant work cannot fix
Before booking, it’s worth knowing the limits:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Cracked or broken glass
- Planning or listed building consent (your local planning authority decides)
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Tenement windows
- Timber door frames
- Stone surrounds
- Period & listed homes
- Brick reveals
- Sash and case windows
How to look after the new joints
To keep the joints looking good and working properly:
- Clear gutters so water doesn’t pour onto the windows
- Check the mastic when you check the paintwork
- Ask us before painting near the mastic
- Keep modern sealant off the mastic
Do not touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
FAQs for South Hornchurch
Do you cover South Hornchurch for sand mastic?
Yes. Our work covers London and the South East, and South Hornchurch is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll send you a clear quote.
Is parking an issue for sand mastic in South Hornchurch?
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 is sand mastic?
Sand plus a binder based on linseed oil. It’s applied by hand and shaped to suit the surround.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
How do I get a quote for sand mastic in South Hornchurch?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Signs you need sand mastic in South Hornchurch
Timber swells and shrinks with the weather. The movement cracks the mastic over time.
Any of these means the joints need attention:
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
- Mastic dropping out of the joint
- Draughty sash windows at the surround
As a London address, South Hornchurch can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- What happens if they find a problem under the old sealant
- Whether you can choose the colour
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
Different surfaces, different methods
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. We shape it by hand to follow the stone.
Landlord and commercial work in South Hornchurch
For anyone letting property in or around South Hornchurch, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.