Greater London · England
Sand mastic for sash & case windows in Roehampton, Greater London
Our applicators work in Roehampton on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Mastic worn away on windows facing the weather
- A silicone bead on a sash window that spoils the look
- Open joints round the window box
About our sand mastic in Roehampton
Sand mastic does not last for ever and gaps open up round the frame. We rake it out and renew it so the surround looks right again. Common call-outs are for gaps round a timber door in stone or brick and old cement repairs round a window that have failed, across period & listed homes, stone surrounds and timber door frames.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Roehampton is something to talk through when you book.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Roehampton (SW15, SW13)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we are called out for in Roehampton
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint.
The problems people normally mention when they call include:
- Cracked mastic round a front door frame
- Gaps between timber frames and stone or brick
- Patchy fillers round a sash window
- A silicone bead on a sash window that spoils the look
Managing a site like Granard Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- What happens if the job turns out different
- What insurance they hold
- What preparation is included
- Whether VAT is included
Why it’s worth doing now in Roehampton
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. 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.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
Why book with us
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
- Full insurance on every job
- More than 20 years in sealant work
See our cost guide and customer reviews.
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes a few hours per window, depending on the condition of the joints from start to finish. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
- Mention any parking rules near the property
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Read more
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Sashes that rattle, stick or will not open
- Timber that has rotted
- Cracked or broken glass
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Tenement windows
- Sash and case windows
- Timber door frames
- Period & listed homes
- Brick reveals
- Stone surrounds
Also near Roehampton
Also in Roehampton
Questions from Roehampton
Do you cover Roehampton for sand mastic?
Yes, Roehampton is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Do you work for landlords with property near Barnes station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Is sand mastic better than silicone for my windows?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we will explain why.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints.
Is consent needed for window work on a listed home?
Checking first is sensible. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Do you have insurance?
Yes. We’re fully insured.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Surface by surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
What affects the quote in Roehampton
Your quote is based on your job. We look at:
- The type of sealant required
- The size of the job
- The number of rooms or windows
- When we can work, for business premises
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Helping us quote
To help us quote quickly, please include:
- The address or postcode of the job
- The problem you’ve noticed
- Photos by email, if that is easy
- Access, such as stairs, a lift or height
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Keep sills and gutters clear so water drains away
- Avoid heavy scraping on the mastic joint
- Renew mastic before redecorating the windows
- Inspect the joints round the windows every year or so
Avoid painting over the new mastic, as traditional guidance advises. If you’re redecorating, ask us first.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Roehampton homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Barnes station? Then any sash windows need sound mastic to keep draughts and rain out. As a London address, Roehampton can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Roehampton is about 2 miles south-west of Fulham, in Greater London. From the centre of Roehampton to the outskirts, sand mastic is available for homes and businesses alike. Roehampton is one of 764 places in Greater London we cover. For nearby work, see our London page.
Postcode districts we cover here for sand mastic: SW15 and SW13. Streets in the area include Rodway Road, Cortis Road and Torwood Road. Neighbouring places we cover for sand mastic include Putney (1 mile north-east), Barnes (1 mile north), Mortlake (1 mile north-west), East Sheen (1 mile north-west) and Putney Vale (2 miles south-west). Within a short drive, we also cover London (7 miles north-east), City of Westminster (5 miles north-east), Marylebone (6 miles north-east), Kensington (3 miles north-east), St Pancras (7 miles north-east) and Shoreditch (8 miles north-east).
What’s near Roehampton
We work in homes and buildings around King's Head pub, The Falcons School for Girls and ARK Putney Academy, among other places. Roehampton’s nearest station is Barnes station, about 0.8 miles north of the centre. Nearby you will also find Queen Mary's Hospital (within half a mile west) and Putney Exchange (1 mile north-east). The countryside around Roehampton includes Kew Gardens Lake and Duke's Hollow.