Greater London · England
Sand mastic for sash & case windows in Upton Park, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Upton Park and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
- Gaps between timber frames and stone or brick
Sand mastic for homes and businesses in Upton Park
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead and we’ll explain which is best for yours. We work on sash and case windows, period & listed homes and brick reveals, and the jobs we see most are mastic that needs renewing before redecorating and open joints round the window box.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Upton Park (E13, E6, E7)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Upton Park: your questions answered
Is Upton Park in your area for sand mastic?
Yes. We work across London and the South East, and Upton Park is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
I let a flat near Woodgrange Park station. Can you help?
Yes. We work for landlords and agents as well as householders. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
How long does the job take?
Most jobs take anything from a few hours to a full day, depending on how many windows, including preparation and clearing up. We will confirm how long when we quote.
How long does sand mastic take to harden?
Not right away. It skins first and hardens fully later, and we will tell you what to expect.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we’re using and why.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Do I need permission for sand mastic on a listed building?
Your local planning authority is the one to ask. They’ll tell you if consent is needed for work to your windows.
More services for Upton Park
Quotes for sand mastic in Upton Park
For a quick quote, just ask. What matters most is:
- Mould in or behind the old joints
- The number of rooms or windows
- How easy the joints are to reach
- When we can work, for business premises
Combining jobs into one visit generally makes better use of the time than several visits. You will get one clear quote for the whole job.
Asking for a quote
Before you ask for a quote, have a think about:
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
- Photos by email, if that is easy
- The address or postcode of the job
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Go gently near the mastic when preparing windows
- Keep modern sealant off the mastic
- Keep sills and gutters clear so water drains away
- Sort the mastic before the decorators arrive
Don’t touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Different surfaces, different methods
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
What happens on the day
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before work begins. Most jobs take a few hours per window, depending on the condition of the joints. In Upton Park, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
What sealant work can’t fix
We will always be straight with you, so here’s what new sealant won’t do:
- Crumbling stone or brickwork round the window
- Planning or listed building consent (your local planning authority decides)
- Broken panes
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Where we work in Upton Park
- Timber door frames
- Sash and case windows
- Stone surrounds
- Tenement windows
- Period & listed homes
- Brick reveals
Windows and doors in Upton Park
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Eastbury Manor House (about 2.7 miles east) are a reminder that the area around Upton Park has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
As a London address, Upton Park can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. In the older streets around St Martin's Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Upton Park is about 5 miles south-east of Walthamstow, in Greater London. Upton Park 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, from the larger towns to small villages. We also work in London, about 6 miles from Upton Park.
We work across E13, E6 and E7 for sand mastic. That includes homes and businesses on May Road, Fry Road and Cave Road and the roads around them. We also cover the places around Upton Park: Greengate (1 mile south-west), Upton (1 mile north-west), Plaistow (1 mile south-west), Plashet (1 mile north-east) and East Ham (1 mile east). Within a short drive, we also cover London (6 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (11 miles west), St Pancras (7 miles west) and Shoreditch (5 miles west).
Local landmarks in Upton Park
Around Upton Park, our work takes us to homes and buildings near Lister Community School, The Service for Deaf and Partially Hearing Children and West Ham Park, among other places. The nearest railway station is Woodgrange Park station, about 1.2 miles north of the centre. Well-known places in the area include Newham University Hospital (0.7 miles south) and West Ham United Football Club Museum (within half a mile east). Green spaces nearby include Old Ford Island and Hollow Pond.
What we’re called out for in Upton Park
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint and we normally remove them.
Signs it’s time to call us include:
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
- Weathered mastic on the most exposed windows
- Wind and rain getting in round a sash window
If you let a flat or house near Woodgrange Park station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- Whether VAT is included
- Is the old sealant removed completely?
- What happens if the job turns out different
- Whether you can choose the colour
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.