Greater London · England
Sand mastic for sash & case windows in Norbury, Greater London
Sand mastic for Norbury and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Old cement repairs round a window that have failed
- Tired mastic found when preparing windows for paint
- A silicone bead on a sash window that spoils the look
How the job changes by surface
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Sand mastic for homes and businesses in Norbury
A silicone bead around a sash window can look out of place and isn’t always the right material. Sand mastic is the traditional choice, and we can replace one with the other. We work on brick reveals, timber door frames and stone surrounds, and people most often call us about mastic that needs renewing before redecorating and gaps round a timber door in stone or brick.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Norbury (CR7, SW16, SE19)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Norbury
What else we do in Norbury
FAQs for Norbury
Do you cover Norbury for sand mastic?
Yes. Our work covers London and the South East, and Norbury is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Do you work for landlords with property near Norbury station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Can sand mastic be painted?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
What does sand mastic cost?
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 will get a clear quote before we start.
Which is right for my windows, sand mastic or modern sealant?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant.
Where are you based?
We work from Crawley. Our applicators cover Norbury.
Can you replace silicone on a period window with sand mastic?
Yes. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Can I choose the sealant colour?
In most cases you can choose. We’ll tell you which colours the right product comes in and agree one before we start.
Do you need sand mastic in Norbury?
Some old mastic was never deep enough. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
It’s worth asking for a quote if you see:
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
- Mastic that needs renewing before redecorating
- Mastic worn away on windows facing the weather
Rented homes near Norbury station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Questions to ask before booking
- How much experience the applicator has
- Are they insured?
- What product goes in the joint
- How the colour is chosen
Why it’s worth doing now in Norbury
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Norbury.
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
Why book with us
- 20+ years of sealant experience
- We’re fully insured
- Rated 4.9 stars on Google
- Approved under the ARBOMaster scheme
Read our cost guide and our reviews.
Norbury homes and the weather
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. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
Managing a site like Kensington Avenue Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. Norbury is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Norbury is about 1 mile north of Thornton Heath, in Greater London. Homes, rented property, offices and hotels in Norbury can book us for sand mastic. The work is guaranteed for a year. Across Greater London, we cover 764 places, Norbury among them. London is on our list too, about 6 miles from Norbury.
Work in CR7, SW16 and SE19 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on Green Lane, Croft Road and Downs Road or anywhere close by, our applicators can take on the job. We also cover Pollards Hill (1 mile north), Thornton Heath (1 mile south), Streatham (2 miles north-west), Streatham Park (2 miles north-west) and Mitcham (2 miles west). We also work in nearby towns such as London (6 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (7 miles north-west), St Pancras (8 miles north) and Shoreditch (8 miles north).
Landmarks near Norbury
We work in homes and buildings around Norbury Manor Business and Enterprise College for Girls, Grangewood Park and Silburn Reid. The closest station to Norbury is Norbury station, about 0.6 miles west of the centre. Well-known places in the area include Crystal Palace Museum (1.5 miles north-east) and Croydon University Hospital (1.3 miles south). The countryside around Norbury includes Knight's Hill and Biggin Wood.
What we can’t put right
A few problems are outside what sealant work can do:
- Cracked or broken glass
- Decisions on consent for listed homes
- Crumbling stone or brickwork round the window
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Norbury
- Timber door frames
- Sash and case windows
- Stone surrounds
- Brick reveals
- Tenement windows
- Period & listed homes
Landlord and commercial work in Norbury
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What happens on the day
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job, and photos are welcome.
Advice
What affects the cost of sand mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- Working hours on commercial sites
- Any mould that needs treating
- The old material and how stubborn it is
- The size of the job
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll explain what it covers.
What we need to know
Before you ask for a quote, have a think about:
- Roughly how big the job is
- The address or postcode of the job
- The type of property
- Photos by email, if that is easy
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. When it suits you, call 0345 464 0079 or send us an email.