Greater London · England
Sand Mastic in Maryland
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Maryland, with a one-year guarantee on every job. Call for a quick quote.
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
Sand mastic for homes and businesses in Maryland
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead, and we will talk through which suits your home. We work on stone surrounds, brick reveals and sash and case windows, and common reasons people get in touch are cracked mastic round a front door frame and patchy fillers round a sash window.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Where
- Maryland (E15, E20, E7)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Maryland
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Places near Maryland
More services for Maryland
What affects the quote in Maryland
Jobs vary more than people expect. The main factors:
- When we can work, for business premises
- The product the joint needs
- The size of the job
- How many areas need sealing
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Photos by email, if that is easy
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, call 0345 464 0079 or drop us an email.
How the job changes by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
What we’re called out for in Maryland
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Look out for these signs:
- Gaps between timber frames and stone or brick
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
- Wind and rain getting in round a sash window
Maryland is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What to look for in a quote
- Is VAT in the price?
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- What happens if the job turns out different
How to look after the new joints
To keep the joints looking good and working properly:
- Clear gutters so water doesn’t pour onto the windows
- Take care around the mastic when scraping paint
- Plan mastic work ahead of painting
- Leave the new mastic unpainted
Leave the new mastic alone while it firms up. It skins over quickly but needs longer to fully harden.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
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 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. Dealing with it early is far simpler for homes in Maryland.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us and we will talk you through it.
Why book with us
- More than 20 years in sealant work
- We never seal over old sealant
- Every job guaranteed for a year
- Anti-fungal silicone where joints get wet
Read our cost guide and what customers say.
What happens on the day
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take a few hours for a single window, longer for several, and we explain the cure time before we leave. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Maryland. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Mention any tricky access
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details, and photos are welcome.
Related advice
Your questions about sand mastic in Maryland
I let a flat near Stratford (London) station. Can you help?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can parking be tricky for a visit in Maryland?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Will there be a smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
How long does the job take?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Larger jobs naturally take longer.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first.
Can I choose the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
How long does sand mastic take to harden?
The surface skins quite quickly and it hardens fully over a longer time. The weather and joint depth both affect it.
Windows and doors in Maryland
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Stratford (London) station, any sash windows need sound mastic to keep draughts and rain out. In the older streets around Church of St John the Evangelist, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Maryland is about 3 miles south of Walthamstow, in Greater London. Wherever you are in the E15 postcode area, we can carry out sand mastic at your property. Maryland is one of 764 towns and villages in Greater London we cover.
We work across the E15, E20 and E7 postcode area for sand mastic and the streets around it. You’ll find streets such as Cam Road, Ward Road and Wise Road, and we cover them all. We also cover Stratford (1 mile west), East Village (1 mile north-west), Temple Mills (1 mile north-west), West Ham (1 mile south-east) and Holloway Down (1 mile north). We also work in nearby towns such as London (5 miles south-west), City of Westminster (7 miles west), Marylebone (6 miles west), Kensington (9 miles west), St Pancras (5 miles west) and Shoreditch (3 miles west).
Around Maryland
Typical jobs here are in homes near Sarah Bonnell School, West Ham Park and Carpenters Primary School and the streets around them. There’s a railway station in Maryland itself: Stratford (London) station. Well-known places in the area include Passmore Edwards Museum (0.5 miles east) and Tower of London (4 miles south-west). The countryside around Maryland includes Old Ford Island and Hollow Pond.