Greater London · England
Sand mastic for sash & case windows in Hampton, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Hampton. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracked mastic round a front door frame
- Old cement repairs round a window that have failed
- Mastic dropping out of the joint
The process
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself generally takes anything from a few hours to a full day, depending on how many windows, depending on the size of the job. In Hampton, 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 look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Let us know about parking restrictions
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
Get a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Advice
About our sand mastic in Hampton
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. Common call-outs are for gaps between timber frames and stone or brick and mastic round period door frames that has failed, across stone surrounds, period & listed homes and tenement windows.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Hampton (TW12, TW11)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Keeping the joints in good condition
Looking after new joints is easy:
- Ask us before painting near the mastic
- Ask the planning authority about consent for listed or conservation-area homes
- Inspect the joints round the windows every year or so
- Get any rot dealt with first
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Signs you need sand mastic in Hampton
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
If you can see any of these, it’s time to have the joints looked at:
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
- Cement or filler used on old window joints that has cracked
Schools such as Hampton Infant School and Nursery are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Before you book anyone
- What product goes in the joint
- Whether they seal over old material or remove it
- When the joint can take water or movement
- Whether VAT is included
Questions from Hampton
Can you help a landlord with a rental near Hampton station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is parking an issue for sand mastic in Hampton?
Parking in Hampton, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we’re using.
What is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and shaped to suit the surround.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Where are you based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
When will the new mastic be hard?
It takes a while. It skins first and hardens fully later and we’ll give you an idea for your job.
Different surfaces, different methods
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. Sand mastic is shaped by hand to suit.
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Landlord and commercial work in Hampton
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What sand mastic looks like in Hampton
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Strawberry Hill House (about 2 miles north-east) are a reminder that the area around Hampton 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.
As a London address, Hampton can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near All Saints' Hampton, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Hampton is about 2 miles south-west of Twickenham, in Greater London. For sand mastic in and around Hampton, please call 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base. 764 places in Greater London are on our list. Our London page covers work nearby (13 miles or so).
Here we cover the TW12 and TW11 postcode area for sand mastic. You will find streets such as Station Road, High Street and Old Farm Road, all of which we cover. You will find Hampton on the A3008, so it’s easy for us to get to. Close by, we work in Hanworth (1 mile north-west), Hampton Hill (1 mile east), West Molesey (1 mile south), Fulwell (1 mile north-east) and East Molesey (2 miles south-east). Within a short drive, we also cover London (13 miles north-east), City of Westminster (11 miles north-east), Marylebone (12 miles north-east), Kensington (9 miles north-east), St Pancras (13 miles north-east) and Shoreditch (15 miles north-east).
Around Hampton
In Hampton, that means homes and buildings near Jolly Coopers pub, Lady Eleanor Holles School and Carlisle Park. For rail, the closest station is Hampton station, roughly 0.5 miles south of the centre. Well-known places in the area include Treaty Centre (3.1 miles north) and Teddington Memorial Hospital (1.5 miles east). Open spaces near Hampton include Oak Avenue Local Nature Reserve and Richmond Hill.
What affects the cost of sand mastic
You will get a clear quote before any work starts. It’s based on:
- The number and length of the joints
- Whether there’s mould to deal with
- The old material and how stubborn it is
- The type of sealant required
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- Where the job is, and your postcode
- A few pictures by email, if you can
- If it’s domestic, commercial or a hotel
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or drop us an email.