Greater London · England

Sand mastic for sash & case windows in Lambeth, Greater London

Professional sand mastic in and around Lambeth, with old sealant always removed completely and a 12-month guarantee.

Silicone on a period window that looks wrong
Gaps round a timber door in stone or brick
Mastic dropping out of the joint

Need sand mastic in Lambeth?

Call 0345 464 0079

Get a quick quote

What affects the cost of sand mastic

We quote each job individually. These are the things that affect it:

Mould in or behind the old joints
How many areas need sealing
When we can work, for business premises
The type of sealant required

A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.

What we need to know

What to tell us when you ask for a quote:

Roughly how big the job is
Any access issues, like height or stairs
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, and we’ll talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or drop us an email.

About our sand mastic in Lambeth

Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant, and we will talk through which suits your home. If you’re dealing with old sand mastic that has cracked, crumbled or fallen out and patchy fillers round a sash window, 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. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in Lambeth as anywhere.

A one-year guarantee comes with the work, just as it does everywhere we cover.

Outdoor mastic being applied where a white frame meets red brickwork, below the fascia and gutter

Place: Lambeth (SE11, SW1P, SW8)
Wider area: Greater London
Guarantee: A year, on every job
Quote: Quoted before any work starts
Telephone: 0345 464 0079
Last updated: 26 October 2026

Landlords, agents and businesses in Lambeth

Letting agents and landlords in Lambeth can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.

A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.

When to call us in Lambeth

Sand mastic slowly weathers. It dries out, cracks and loses its grip from the frame or the masonry.

Any of these means the joints need attention:

Open joints round the window box
Crumbling sand mastic round a window
Patchy fillers round a sash window
Failed mastic on an exposed elevation

For site and facilities teams at buildings such as Vauxhall Primary School, the mastic around its windows and doors needs looking after like any other building’s.

What your quote should include

What preparation is included
The length of the guarantee
Are they insured?
Whether the sealant suits the joint

How to choose a mastic man

Leave it or put it right?

Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Lambeth, the repair is bigger than a sealant job.

Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.

What you get with us

Arbo and Everbuild products
Every job guaranteed for a year
Old sealant always removed completely
Full insurance on every job

Take a look at what affects the cost or what customers say.

Frames and glazing around Lambeth

Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Benjamin Franklin House (about 1.2 miles north) nearby, there’s older building stock in the area around Lambeth as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.

Rented homes near Vauxhall station change hands often, and any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near St Peter's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.

Lambeth is about 1 mile south-west of London, in Greater London. Lambeth gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Across Greater London, we cover 764 places, Lambeth among them.

We cover every part of the SE11, SW1P and SW8 postcode area for sand mastic and the streets around it. Streets in the area include Gibson Road, Langley Lane and Randall Road, all of which we cover. Main roads around Lambeth include the A3203 and A3204. Nearby, we also carry out sand mastic in Vauxhall (1 mile north), Kennington (1 mile south), Oval (1 mile south), Newington Butts (1 mile east) and St George's Fields (1 mile north-east). We also work in nearby towns such as Kensington (4 miles west), Shoreditch (3 miles north-east), Walthamstow (8 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles north-east) and Hampstead (5 miles north-west).

Near you in Lambeth

Typical jobs here are in homes near The Jolly Gardeners pub, Old Paradise Gardens and Lambeth Palace Library and the streets around them. You’ll also find Lambeth School of Art (under half a mile south) and Lilian Baylis Technology School (under half a mile south). There’s a railway station in Lambeth itself: Vauxhall station. Other landmarks nearby include Newport Street Gallery (within half a mile north-east) and Evelina London Children's Hospital (0.5 miles north). Not far away are Bellenden Road Nature Garden and Ludgate Hill.

Map of Lambeth © OpenStreetMap contributors

Lambeth: your questions answered

Is parking a problem for a job in Lambeth?

It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.

Is Lambeth in your area for sand mastic?

Yes. We work across London and the South East, and Lambeth is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.

I rent my home. Can I book you?

Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.

Is there any odour?

There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.

Do I need to be at home?

It depends on the job. Inside work needs someone to give us access.

Should I use sand mastic or silicone?

That depends on your windows. On many period windows, sand mastic looks right and suits the building and newer frames generally get a flexible sealant.

Can old silicone round a sash window be swapped for sand mastic?

In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.

Can landlords and businesses book you?

Yes. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.

Should I try it myself first?

Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.

Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.

What we do, step by step

There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. In Lambeth, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.

Each surround is checked first.
The joint is raked out and cleaned.
Large voids are packed out.
New sand mastic is applied and shaped by hand.
We finish the mastic to a tidy line.

Getting ready for the visit

Let us know about earlier repairs to the joints
Where the joints are inside, avoid wetting them before we arrive
Mention any parking rules near the property

Getting a quote

For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.

Get a quick quote