Greater London · England
Sand mastic for sash & case windows in Pollards Hill, Greater London
Sand mastic for Pollards Hill, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps round a timber door in stone or brick
- Silicone on a period window that looks wrong
- Patchy fillers round a sash window
Sand mastic in Pollards Hill: local notes
Historic houses like Kingswood House (about 1.9 miles north-east) are a reminder that the area around Pollards Hill 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 check that before booking.
Managing a site like Kensington Avenue Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Norbury station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Pollards Hill is about 1 mile north of Thornton Heath, in Greater London. If you need sand mastic in Pollards Hill, please ring 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover Greater London, Pollards Hill included. Our Greater London coverage runs to 764 places, Pollards Hill among them. For nearby work, see our London page, about 6 miles away.
Every address in CR7, SW16 and SE19 is covered for sand mastic. That includes homes and businesses on Green Lane, Croft Road and Downs Road and the roads around them. If you’re just outside Pollards Hill, we cover Norbury (1 mile north), Thornton Heath (1 mile south), Streatham (2 miles north-west), Streatham Park (2 miles north-west) and Mitcham (2 miles west). Further out, we also cover 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 Pollards Hill
We work in homes and buildings around Norbury Manor Business and Enterprise College for Girls, Silburn Reid and The Moon Under Water pub, among other places. Pollards Hill’s nearest station is Norbury station, roughly 0.6 miles west of the centre. Other landmarks nearby include Crystal Palace Museum (1.5 miles north-east) and Croydon University Hospital (1.3 miles south). Green spaces nearby include Knight's Hill and Biggin Wood.
Sand mastic in Pollards Hill, done properly
Our applicators renew the sand mastic around sash and case windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. We work on timber door frames, tenement windows and period & listed homes, and people most often call us about crumbling sand mastic round a window and a silicone bead on a sash window that spoils the look.
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.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Pollards Hill (CR7, SW16, SE19)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Do you need sand mastic in Pollards Hill?
Paint, silicone or cement used over old mastic causes problems. They do not suit the joint and we normally remove them.
These are the problems we’re asked about most:
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
- Gaps where the frame meets the masonry
- Mastic round period door frames that has failed
For an older house near a landmark such as St Oswald, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- What the quote includes, VAT included or not
- What insurance they hold
- How hidden problems are handled
- What the cure time is
Common questions in Pollards Hill
I let a flat near Norbury station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Pollards Hill for sand mastic?
Yes. We work across London and the South East, and Pollards Hill is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Is sand mastic better than silicone for my windows?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
How long does sand mastic take?
That depends on the amount of work, but most jobs take a few hours per window, depending on the condition of the joints. We will give you a better idea when we quote.
Can you quote for more than one area?
Yes, we can. More than one area can be quoted together.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
What is sand mastic?
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 you guarantee sand mastic work?
Our 12-month guarantee applies to all our work.
Different surfaces, different methods
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we will confirm access.
What affects the quote in Pollards Hill
The price is agreed before any work begins. It’s based on:
- The type of sealant required
- How easy the joints are to reach
- Mould in or behind the old joints
- The size of the job
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Helping us quote
To make quoting easier, please include:
- A few photos by email, if you can
- What’s wrong with the joints now
- The type of property
- Whether it has been sealed before
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or email us.
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to a full day, depending on how many windows. In a London area like Pollards Hill, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
For sand mastic in Pollards Hill, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
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Why act early in Pollards Hill
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new mastic stays put. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Pollards Hill, the repair is bigger than a sealant job.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why Pollards Hill customers choose us
- Fully insured
- Old sealant always removed completely
- Approved under the ARBOMaster scheme
- Rated 4.9 stars on Google
Take a look at our cost guide or our reviews.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Find out about consent before window work on a listed home
- Go gently near the mastic when preparing windows
- Check the mastic when you check the paintwork
- Do not paint over the new mastic
Don’t touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.