Greater London · England
Sand Mastic in Eastfields
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Eastfields. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed mastic on an exposed elevation
- Mastic dropping out of the joint
- Cement or filler used on old window joints that has cracked
Sand mastic in Eastfields, done properly
Sand mastic suits most period window surrounds. Newer frames normally get a flexible sealant instead, and we’ll talk through which suits your home. If you have weathered mastic on the most exposed windows and silicone on a period window that looks wrong, 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.
A one-year guarantee comes as standard.
- Location
- Eastfields (CR4, SW16, SW17)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Eastfields
If you are redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
Why Eastfields customers choose us
- Homes, businesses and hotels
- 4.9 on Google from 180+ five-star reviews
- Quality sealants from Arbo and Everbuild
- Anti-fungal sanitary silicone in wet areas
Landlord and commercial work in Eastfields
Housing providers, facilities teams and property managers book us too in Eastfields and across Greater London. We can quote a run of properties together.
Landlords and letting agents in Eastfields can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
How we quote for sand mastic
Call for a quick quote. What matters most is:
- The product the joint needs
- The size of the job
- Whether old sealant or filler has to be cut out
- Access and height
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email.
What to tell us for a quote
You do not need to know the technical terms. Just tell us:
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- Where the property is
To get a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
How the visit works
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Eastfields. It helps if you can point us to a visitor permit or a bay close to the door.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Read more
Places near Eastfields
What else we do in Eastfields
Your questions about sand mastic in Eastfields
Do you work for landlords with property near Mitcham Eastfields station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is Eastfields in your area for sand mastic?
Yes, Eastfields is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses and we are fully insured.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Do you offer different sealant colours?
Most of the time, yes. We’ll explain which colours are available.
What should I tell you?
Let us know what needs doing and where, with photos by email if possible. We’ll ask anything else we need to know.
Should I use sand mastic or silicone?
We will help you decide. Period homes often look best with sand mastic and newer frames suit modern sealant.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
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 doesn’t work out, we can still put it right.
What we’re called out for in Eastfields
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
Signs it’s time to call us include:
- Patchy fillers round a sash window
- Wind and rain getting in round a sash window
- Mastic worn away on windows facing the weather
- Mastic that needs renewing before redecorating
If you look after a building such as St Mark's Church of England Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- What product goes in the joint
- What the cure time is
- How much experience the applicator has
- How the joint is cleaned and prepared
Honest limits
A few problems are outside what sealant work can do:
- Planning or listed building consent (your local planning authority decides)
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Timber door frames
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Tenement windows
Windows and doors in Eastfields
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. Historic houses like Southside House (about 3.4 miles west) are a reminder that the area around Eastfields has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Eastfields is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Homes close to St. Mark's Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Eastfields is about 3 miles south-east of Wimbledon, in Greater London. If you need sand mastic in Eastfields, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We are based in Crawley and cover Greater London. Eastfields is one of 764 places in Greater London we cover for sand mastic. For nearby work, see our London page.
All of CR4, SW16 and SW17 is covered for sand mastic, from the main roads to the quietest streets. Sand mastic is available to properties on Bond Road, Hill Road and York Lane. We also cover Mitcham (1 mile south), Hackbridge (1 mile south), Colliers Wood (1 mile north-west), Furzedown (1 mile north) and Merton Abbey (1 mile west). Larger places within reach include London (7 miles north), City of Westminster (7 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (8 miles north) and Shoreditch (9 miles north).
Landmarks near Eastfields
Locally, jobs take us to homes and businesses close to The White Lion of Mortimer pub, Figge's Marsh and Furzedown Secondary School. There’s a railway station in Eastfields itself: Mitcham Eastfields station. Well-known places in the area include Centrale Croydon (3.1 miles south-east) and Wandle Industrial Museum (0.7 miles south-west). Open spaces near Eastfields include Henman Hill and Oakleigh Way.