Greater London · England
Sand mastic for sash & case windows in Woodside, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Woodside. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
Looking after it afterwards
After the cure time, these simple habits help:
- Make sure water runs off the sill
- Find out about consent before window work on a listed home
- Don’t run silicone over sand mastic
- Ask us before painting near the mastic
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.
Sand mastic in Woodside, done properly
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditional guidance is not to paint over it and we will advise if you’re redecorating. We are often asked to deal with gaps round a timber door in stone or brick and mastic dropping out of the joint, across period & listed homes, tenement windows and stone surrounds.
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.
The work is covered for a year after we finish. If anything is not right with it, phone 0345 464 0079 or drop us an email.
- Where
- Woodside (CR0, SE25, CR9)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Woodside
Other services in Woodside
Woodside questions
Is Woodside in your area for sand mastic?
Yes. Our work covers London and the South East, and Woodside is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Can you help a landlord with a rental near Norwood Junction station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
How long does the job take?
A typical job takes a few hours per window, depending on the condition of the joints, including the preparation. We will confirm how long when we quote.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Should I use sand mastic or silicone?
We will talk it through with you. Period homes often look best with sand mastic and newer frames suit modern sealant.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Are you insured?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Do you offer different sealant colours?
We help you choose a colour that suits. The choice depends on the product the joint needs.
Should I try it myself first?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Why deal with it now?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and blends with the stone or brick. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Woodside, the repair is bigger than the sealant job would have been.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why Woodside clients choose us
- Any old sealant cut out fully, not covered over
- Arbo and Everbuild products
- Anti-fungal sanitary silicone in wet areas
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced or customer reviews.
Landlord and commercial work in Woodside
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Landlords and letting agents in Woodside can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
What happens on the day
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours per window, depending on the condition of the joints. In Woodside, as in most of London, parking needs a little planning. 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.
- 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
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Read more
What sand mastic looks like in Woodside
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Woodside is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you let a flat or house near Norwood Junction station, any sash windows need sound mastic to keep draughts and rain out. For site and facilities teams at buildings such as St Thomas Becket Catholic Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Woodside is about 6 miles south of New Cross, in Greater London. If you need sand mastic in Woodside, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Greater London from our Crawley base, Woodside included. Woodside is one of 764 towns and villages in Greater London we cover. There’s also a page for London, roughly 8 miles from Woodside.
Postcode districts we cover here for sand mastic: CR0, SE25 and CR9. If you need sand mastic at a property on Long Lane, Tudor Road and Coe Avenue or anywhere close by, our applicators can take on the job. Neighbouring places we cover for sand mastic include Ashburton (1 mile south), Addiscombe (1 mile south), Shirley Oaks (1 mile south-east), Monks Orchard (1 mile south-east) and Shirley (1 mile south-east). Within a short drive, we also cover London (8 miles north), City of Westminster (9 miles north-west), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
Landmarks near Woodside
In Woodside, that means homes and buildings near The Beehive pub, Oasis Academy Shirley Park and Ashburton Park and the streets around them. The closest station to Woodside is Norwood Junction station, about 0.7 miles north-west. Well-known places in the area include Whitgift Centre (1.7 miles south-west) and Crystal Palace Museum (2.2 miles north). Green spaces nearby include Bramley Bank and Duppas Hill.
Different surfaces, different methods
Stone surrounds
Stone openings are rarely perfectly straight, so the gap is not the same all the way round. Sand mastic is shaped by hand to suit.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
When something else is needed
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Decisions on consent for listed homes
- Damaged stone surrounds
- Putty and glazing repairs
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Where we work in Woodside
- Period & listed homes
- Timber door frames
- Stone surrounds
- Sash and case windows
- Brick reveals
- Tenement windows