Greater London · England
Sand Mastic in Upper Edmonton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Upper Edmonton. Fully insured, ARBOMaster approved and guaranteed for a year.
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
- Gaps round a timber door in stone or brick
About our sand mastic in Upper Edmonton
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. We work on sash and case windows, timber door frames and stone surrounds, and common reasons people get in touch are mastic round period door frames that has failed and wind and rain getting in round a sash window.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking, and access in Upper Edmonton is something to talk through when you book.
Our work is backed for twelve months, in Upper Edmonton and everywhere else we cover.
- Location
- Upper Edmonton (N18, N9, N17)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Upper Edmonton
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Aftercare tips
After the cure time, these simple habits help:
- Find out about consent before window work on a listed home
- Take care around the mastic when scraping paint
- Don’t paint over the new mastic
- Renew mastic before redecorating the windows
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
What we do, step by step
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to a full day, depending on how many windows. In Upper Edmonton, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Let us know about parking restrictions
- Clear the area around the work
- On commercial sites, let us know about site rules
Ask for a quote
We quote each job on its own. Just phone 0345 464 0079 or send us an email with the details.
Advice
FAQs for Upper Edmonton
Do you work for landlords with property near Silver Street station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Can you do sand mastic in Upper Edmonton?
Yes, Upper Edmonton 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, and we will give you a clear price.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Do I need permission for sand mastic on a listed building?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like but the decision is theirs.
Do you guarantee sand mastic work?
Every job comes with our one-year guarantee, and we are fully insured.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Also near Upper Edmonton
Also in Upper Edmonton
Quotes for sand mastic in Upper Edmonton
The price is agreed before any work begins. It’s based on:
- The size of the job
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
When you contact us, these details help:
- Whether it’s a home or a business
- Where the job is, and your postcode
- Whether it has been sealed before
- Pictures of the joints, sent by email
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To get started, ring 0345 464 0079 or email us.
What we’re called out for in Upper Edmonton
Age is the main cause. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
These are the problems we’re asked about most:
- Silicone on a period window that looks wrong
- Patchy fillers round a sash window
- Open joints round the window box
- Cracked mastic round a front door frame
Managing a site like St John and St James CofE Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before booking
- What preparation is included
- How long to leave it before use
- How the colour is chosen
- Is the old sealant removed completely?
Upper Edmonton homes and the weather
With historic houses such as Bruce Castle (about 1.1 miles south) nearby, there’s older building stock in the area around Upper Edmonton as well as newer homes. 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.
As a London address, Upper Edmonton can be tricky for parking: let us know about parking bays, permits or a driveway. Rented homes near Silver Street station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Upper Edmonton is about 1 mile south of Edmonton, in Greater London. Whether you are in the middle of Upper Edmonton or further out, sand mastic is available for homes and businesses alike. Upper Edmonton is one of 764 towns and villages in Greater London where we work for sand mastic. There’s also a page for London, roughly 8 miles from Upper Edmonton.
Here we cover the N18, N9 and N17 postcode area for sand mastic. We cover properties on Bull Lane, Park Lane and York Road and the roads around them. We also cover the places around Upper Edmonton: Northumberland Park (1 mile south-east), Edmonton (1 mile north), Picketts Lock (2 miles north-east), South Chingford (2 miles east) and Winchmore Hill (2 miles north-west). We also work in nearby towns such as London (8 miles south), City of Westminster (8 miles south-west), Marylebone (8 miles south-west), Kensington (10 miles south-west), St Pancras (6 miles south) and Shoreditch (6 miles south).
Around Upper Edmonton
Locally, jobs take us to homes and businesses close to Pymmes Park, Tottenham University Technical College and London Academy of Excellence Tottenham, among other places. Upper Edmonton has its own railway station: Silver Street station. Well-known places in the area include North Middlesex University Hospital (less than half a mile west) and Broomfield House Museum (2.2 miles west). For a walk, there’s Pole Hill and Highams Park Lake.
Different surfaces, different methods
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.