Greater London · England
Sand mastic for sash & case windows in Broad Green, Greater London
Sand mastic for Broad Green, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Patchy fillers round a sash window
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
Common questions in Broad Green
Is parking a problem for a job in Broad Green?
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.
Is Broad Green in your area for sand mastic?
Yes. We work across London and the South East, and Broad Green is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
How long does sand mastic take to go off?
The surface skins quite quickly and it hardens fully over a longer time. Timing depends on the weather and the joint.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or drop us an email.
How long does the job take?
Typically it takes a few hours for a single window, longer for several. Larger jobs naturally take longer, and we’ll say how long yours will take.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will tell you what we’re using.
Sand mastic in Broad Green, done properly
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. If you are dealing with mastic dropping out of the joint and wind and rain getting in round a sash window, we can put it right.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Broad Green as anywhere.
Your job is guaranteed for a year, as with all our work.
- Place
- Broad Green (CR0, CR7, CR90)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Different surfaces, different methods
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Places near Broad Green
Other services in Broad Green
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Honest limits
We will always be straight with you, so here’s what sealant can’t fix:
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
- Broken panes
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Where we work in Broad Green
- Tenement windows
- Timber door frames
- Brick reveals
- Period & listed homes
- Sash and case windows
- Stone surrounds
What affects the cost of sand mastic
You will get a clear quote before work begins. It takes into account:
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
- The size of the job
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The type of property
- Access, such as stairs, a lift or height
- The rough size of the job
- What’s wrong with the joints now
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Why deal with it now?
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us and we will talk you through it.
Why us?
- An ARBOMaster approved applicator
- Anti-fungal silicone where joints get wet
- Rated 4.9 stars on Google
- We never seal over old sealant
Take a look at how sealant jobs are priced or customer reviews.
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and tidy away. It usually takes a few hours per window, depending on the condition of the joints. For a job in Broad Green, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we are working on
- Plan for the work area to be out of bounds to pets and children
Getting a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
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Frames and glazing around Broad Green
Historic houses like Kingswood House (about 3.2 miles north) are a reminder that the area around Broad Green 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. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
Broad Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway. For an older house near a landmark such as Church of St Saviour, the joint between an old wall and a newer frame is usually the first place rain gets in. If you let a flat or house near West Croydon station, any sash windows need sound mastic to keep draughts and rain out.
Broad Green is about 6 miles south of Stockwell, in Greater London. Whether you are in the middle of Broad Green or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, Broad Green among them. For nearby work, see our London page (8 miles or so).
Here we cover the CR0, CR7 and CR90 postcode area for sand mastic. Local streets include York Road, Nova Road and Lion Road, all of which we cover. If you’re just outside Broad Green, we cover Old Town (1 mile south), Beddington (2 miles south-west), Waddon (2 miles south), Bandonhill (2 miles south-west) and Wallington (2 miles south-west). We also work in nearby towns such as London (8 miles north), City of Westminster (9 miles north), Marylebone (9 miles north), Kensington (9 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
What’s near Broad Green
In Broad Green, that means homes and buildings near Harris Invictus Academy Croydon, The Half Moon pub and Waddon Ponds, among other places. The nearest railway station is West Croydon station, about 0.6 miles south. Nearby you will also find Centrale Croydon (0.8 miles south) and Croydon University Hospital (under half a mile north-west). Not far away are Duppas Hill and Biggin Wood.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.