Greater London · England
Sand mastic for sash & case windows in Tottenham Green, Greater London
Professional sand mastic in and around Tottenham Green, with every bit of old sealant taken out first and a one-year guarantee.
- Failed mastic on an exposed elevation
- Gaps round a timber door in stone or brick
- Wind and rain getting in round a sash window
Sand mastic in Tottenham Green
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead and we will explain which is best for yours. If you have open joints round the window box and mastic that needs renewing before redecorating, we can put it right.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
You get a 12-month guarantee, the same in Tottenham Green as everywhere else we work.
- Location
- Tottenham Green (N15, N17, N16)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Damaged stone surrounds
- Sashes that rattle, stick or will not open
- Cracked or broken glass
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Stone surrounds
- Period & listed homes
- Timber door frames
- Tenement windows
- Brick reveals
- Sash and case windows
Tottenham Green homes and the weather
Historic houses like Bruce Castle (about 0.9 miles north) are a reminder that the area around Tottenham Green has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book.
Managing a site like Earlsmead Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Seven Sisters station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Tottenham Green is about 2 miles west of Walthamstow, in Greater London. Jobs in Tottenham Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our Greater London coverage runs to 764 places, Tottenham Green among them. For nearby work, see our London page, about 6 miles away.
Jobs for sand mastic in N15, N17 and N16 works the same way as everywhere else we cover. You’ll find streets such as Ida Road, High Road and Hale Road, all of which we cover. Other places close to Tottenham Green include South Tottenham (1 mile south), Seven Sisters (1 mile south), Tottenham Hale (1 mile east), St Ann's (1 mile south-west) and Broadwater Farm (1 mile north-west). Further out, we also cover London (6 miles south), City of Westminster (6 miles south-west), Marylebone (6 miles south-west), Kensington (8 miles south-west), St Pancras (5 miles south-west) and Shoreditch (4 miles south).
Local landmarks in Tottenham Green
We work in homes and buildings around Church of St Andrew, Gladesmore Community School and Ada College, among other places. Nearby too are The Beehive Public House (0.5 miles north) and Chestnuts Park (0.8 miles west). Tottenham Green has its own railway station: Seven Sisters station. A little further out are Markfield Beam Engine and Museum (0.6 miles south-east) and The Mall Wood Green (1.6 miles west). The countryside around Tottenham Green includes Woodberry Wetlands and Hollow Pond.
Why deal with it now?
New mastic over crumbling mastic will not hold. We remove the loose material first so the new mastic stays put. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Tottenham Green.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why choose Mr Mastic in Tottenham Green
- Domestic, commercial and hotel work
- Tidy, careful work
- 12-month guarantee on every job
- Arbo and Everbuild products
See our cost guide and customer reviews.
FAQs for Tottenham Green
Is Tottenham Green in your area for sand mastic?
Yes. We work across London and the South East, and Tottenham Green is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Is parking an issue for sand mastic in Tottenham Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
I’m a tenant. Can you help?
Yes. Check with your landlord; we can send the quote to them too.
Do you hold any approvals?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
How long will you be here?
A typical job takes a few hours per window, depending on the condition of the joints. We’ll confirm how long when we quote.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
How the visit works
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work begins. Most jobs take a few hours per window, depending on the condition of the joints. For a job in Tottenham Green, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We look at the surrounds with you and agree the joints to renew.
- 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.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
- Tell us if parking is tricky
How to get a quote
If you’re in Tottenham Green and need sand mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Advice
Work for landlords, hotels and businesses
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Letting agents and landlords in Tottenham Green can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
How we quote for sand mastic
For a quick quote, just ask. What matters most is:
- The number and length of the joints
- Any working-time requirements on site
- Whether the work is at height
- Which sealant suits the joint
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
Places near Tottenham Green
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When to call us in Tottenham Green
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Keep an eye out for these signs:
- Mastic that needs renewing before redecorating
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
- Modern sealant on a period surround
For an older house near a landmark such as Church of Holy Trinity, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- Whether they’re fully insured
- What the quote includes, VAT included or not
- What happens if the job turns out different
- How the joint is cleaned and prepared
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
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.