Greater London · England
Sand mastic for sash & case windows in Petts Wood, Greater London
Problem with your window and door surrounds in Petts Wood? We cut out the old, prepare the joints and apply the right sealant.
- Crumbling sand mastic round a window
- Gaps round a timber door in stone or brick
- Cement or filler used on old window joints that has cracked
Sand mastic for homes and businesses in Petts Wood
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. Typical jobs include open joints round the window box and wind and rain getting in round a sash window, across sash and case windows, tenement windows and period & listed homes.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, which is when draughts and damp patches appear in homes in Petts Wood.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Petts Wood (BR5, BR6, BR2)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
Quotes for sand mastic in Petts Wood
You’ll get a clear quote before we start. It’s based on:
- How many areas need sealing
- The size of the job
- Working hours on commercial sites
- The old material and how stubborn it is
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or email us.
Helping us quote
To make quoting easier, please include:
- How we’d reach the joints
- The type of property
- Roughly how big the job is
- Any previous sealing or DIY work
For sand mastic in Petts Wood, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Housing providers, facilities teams and property managers book us too in Petts Wood and across Greater London. We can quote a run of properties together, and we’re fully insured for the work.
The process
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to a full day, depending on how many windows in most cases. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Petts Wood. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- 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
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
Getting 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.
Advice
Petts Wood questions
Can you do sand mastic in Petts Wood?
Yes. Our work covers London and the South East, and Petts Wood is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Is parking an issue for sand mastic in Petts Wood?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Can I paint the new mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is the work guaranteed?
There’s a 12-month guarantee on every job, sand mastic included.
Do you offer different sealant colours?
We help you choose a colour that suits. The choice depends on the product the joint needs.
I rent my home. Can I book you?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Check the mastic when you check the paintwork
- Find out about consent before window work on a listed home
- Keep sills and gutters clear so water drains away
- Get any rot dealt with first
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Windows and doors in Petts Wood
The South East is one of 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 check that before booking.
If you live in an older home near St Francis Church, the joint between an old wall and a newer frame is normally the first place rain gets in. For site and facilities teams at buildings such as Crofton Junior School, the mastic around its windows and doors needs looking after like any other building’s. As a London address, Petts Wood can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Petts Wood is about 1 mile west of Orpington, in Greater London. From the centre of Petts Wood to the outskirts, we cover sand mastic for every kind of property. Petts Wood is one of 764 places in Greater London we cover. Our London page covers work nearby (11 miles or so).
Here we cover the BR5, BR6 and BR2 postcode area for sand mastic. Sand mastic is available to properties on Tent Peg Lane, Ryecroft Road and Beaumont Road. Nearby, we also carry out sand mastic in Crofton (1 mile south), Broom Hill (1 mile south-east), Southborough (1 mile west), Locksbottom (1 mile south-west) and Bromley Common (2 miles west). Within a short drive, we also cover London (11 miles north-west), City of Westminster (13 miles north-west), Marylebone (13 miles north-west), Kensington (14 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north-west).
What’s near Petts Wood
Locally, jobs take us to homes and businesses close to Jubilee Country Park, Bromley High School and Daylight Inn, among other places. There’s a railway station in Petts Wood itself: Petts Wood station. Nearby you will also find Bridgeways Day Hospital (1.5 miles west) and Crofton Roman Villa (1.2 miles south-east). Open spaces near Petts Wood include The Warren and Summer Hill.
What we cannot put right
A few problems are outside what sealant work can do:
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
- Cracked or broken glass
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Stone surrounds
- Timber door frames
- Sash and case windows
- Tenement windows
- Period & listed homes
- Brick reveals
Should I try it myself first?
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, and the work is guaranteed for a year.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.