Hertfordshire · England
Sand mastic for sash & case windows in Ridge, Hertfordshire
Sand mastic for Ridge and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Old cement repairs round a window that have failed
- Draughts and rain around sash boxes
- A silicone bead on a sash window that spoils the look
Surface by surface
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. It’s renewed by hand.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
About our sand mastic in Ridge
We work across Ridge renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. We work on stone surrounds, tenement windows and brick reveals, and the jobs we see most are mastic dropping out of the joint and modern sealant on a period surround.
Somewhere as small as Ridge, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Your job is guaranteed for a year, as with all our work.
- Place
- Ridge (EN6)
- Wider area
- Hertfordshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere like Ridge needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You’ll have a clear quote before work begins.
Related advice
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Why it’s worth doing now in Ridge
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new work lasts. In a small place like Ridge, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
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.
Why book with us
- Neat joints and a tidy finish
- 20+ years of sealant experience
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, 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 are 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.
Frames and glazing around Ridge
Historic houses like Wyllyotts Manor (about 2.2 miles east) are a reminder that the area around Ridge has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
Rented homes near Potters Bar station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. In the older streets around Church of St Margaret, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as St Giles' CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Ridge is about 2 miles north-east of Borehamwood, in Hertfordshire. Ridge gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Ridge is one of 381 towns and villages in Hertfordshire where we work for sand mastic. For nearby work, see our London page.
Every address in EN6 is within our area for sand mastic. Streets in the area include Crossoaks Lane, Deeves Hall Lane and Blanche Lane. We also cover South Mimms (1 mile north-east), Dancers Hill (1 mile south-east), Well End (1 mile south), Green Street (2 miles south-west) and Shenley (2 miles west). We also work in nearby towns such as Watford (7 miles west), Hemel Hempstead (10 miles north-west), Stevenage (15 miles north), St Albans (6 miles north-west), Welwyn Garden City (8 miles north) and Harpenden (10 miles north-west).
Local landmarks in Ridge
Typical jobs here are in homes near Manor Lodge School, Dame Alice Owen's School and North Mimms Park. Ridge’s nearest station is Potters Bar station, about 2.3 miles east. Other landmarks nearby include Hilfield Castle (4.6 miles south-west) and Hertfordshire Scout Museum (1.4 miles south-west). Not far away are Darland's Lake and Furzefield Wood and Lower Halfpenny.
Honest limits
It helps to know what we can’t do too:
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Period & listed homes
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
More services for Ridge
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Avoid heavy scraping on the mastic joint
- Ask the planning authority about consent for listed or conservation-area homes
- Don’t run silicone over sand mastic
- Check the mastic when you check the paintwork
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Your questions about sand mastic in Ridge
Is Ridge in your area for sand mastic?
Yes, Ridge is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Do you work for landlords with property near Potters Bar station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
When will the new mastic be hard?
It takes a while. The skin forms first, and the full set comes later, and we’ll tell you what to expect.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
How long does the job take?
That depends on how much there is to do, but as a guide it takes a few hours per window, depending on the condition of the joints. We’ll give you a better idea when we quote.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
Is consent needed for window work on a listed home?
Checking first is sensible. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.