Greater London · England
Sand Mastic in Crofton Park
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Crofton Park, backed by a one-year guarantee. Call for a quick quote.
- Draughts and rain around sash boxes
- Failed mastic on an exposed elevation
- Gaps round a timber door in stone or brick
Crofton Park homes and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Queen's House (about 2.4 miles north-east) nearby, there’s older building stock in the area around Crofton Park as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Homes close to Church of St Hilda include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you let a flat or house near Crofton Park station, any sash windows need sound mastic to keep draughts and rain out. As a London address, Crofton Park can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Crofton Park is about 1 mile south of New Cross, in Greater London. Jobs in Crofton Park get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, Crofton Park among them.
Our applicators cover all of the SE4, SE6 and SE23 postcode area for sand mastic. Local streets include Ivy Road, Nash Road and Lindal Road. Neighbouring places we cover for sand mastic include Brockley (1 mile north-west), Ladywell (1 mile east), Honor Oak (1 mile west), Forest Hill (1 mile south-west) and Nunhead (1 mile north-west). Within a short drive, we also cover London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (8 miles north-west), St Pancras (6 miles north-west) and Shoreditch (5 miles north).
What’s near Crofton Park
In Crofton Park, that means homes and buildings near Blythe Hill Tavern, Prendergast Ladywell School and Blythe Hill Fields, among other places. There’s a railway station in Crofton Park itself: Crofton Park station. A little further out are University Hospital Lewisham (0.7 miles east) and Horniman Museum and Gardens (1.4 miles south-west). Not far away are One Tree Hill and Knight's Hill.
Sand mastic for homes and businesses in Crofton Park
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It’s a good fit for period properties, where modern sealant can look out of place. Typical jobs include gaps round a timber door in stone or brick and weathered mastic on the most exposed windows, on brick reveals, sash and case windows and period & listed homes.
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.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Place
- Crofton Park (SE4, SE6, SE23)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for sand mastic in Crofton Park
Call for a quick quote. The main things that affect it are:
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- The size of the job
The cost depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before we start.
Helping us quote
What to tell us when you ask for a quote:
- Where the property is
- The rough size of the job
- What’s wrong with the joints now
- A few photos by email, if you can
We quote each job on its own. Just call 0345 464 0079 or send us an email with the details.
Also near Crofton Park
More services for Crofton Park
Landlords, agents and businesses in Crofton Park
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
When something else is needed
We will not take on work that will not last, so these are the limits:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Masonry that needs repairing
- Whether work needs listed building consent
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Timber door frames
- Tenement windows
- Sash and case windows
- Stone surrounds
- Brick reveals
- Period & listed homes
What we do, step by step
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours per window, depending on the condition of the joints. For a job in Crofton Park, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
- Mention any parking rules near the property
How to get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
Crofton Park: your questions answered
Can you help a landlord with a rental near Crofton Park station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can you do sand mastic in Crofton Park?
Yes. Our work covers London and the South East, and Crofton Park is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
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.
Do you take out the old sealant first?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
What’s sand mastic made of?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Aftercare tips
After the cure time, these simple habits help:
- Avoid patching sand mastic with silicone
- Get any rot dealt with first
- Sort the mastic before the decorators arrive
- Check the mastic when you check the paintwork
Leave the new mastic unpainted, as traditional guidance advises. If you are redecorating, ask us first.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Surface by surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
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.