Hertfordshire · England
Micklefield Green Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Micklefield Green. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Mastic round period door frames that has failed
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
Sand mastic for homes and businesses in Micklefield Green
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. We are often asked to deal with cracked mastic round a front door frame and cement or filler used on old window joints that has cracked, on period & listed homes, brick reveals and sash and case windows.
In a village or hamlet like Micklefield Green, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Location
- Micklefield Green (WD3)
- Wider area
- Hertfordshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Micklefield Green: your questions answered
Will you come out to Micklefield Green?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Chorleywood station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
What do you need from me for a quote?
Tell us what needs doing and where, plus pictures if you have them. We will ask anything else we need to know.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Can old silicone round a sash window be swapped for sand mastic?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Landlords, agents and businesses in Micklefield Green
We also work for property managers and facilities teams. Several sites can go on one quote, and we are fully insured.
We work for landlords and agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
The process
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and clear up. It normally takes anything from a few hours to a full day, depending on how many windows. Somewhere like Micklefield Green needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
Getting 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, and add pictures by email if you can.
Related advice
What affects the quote in Micklefield Green
Call for a quick quote. What matters most is:
- Mould in or behind the old joints
- The size of the job
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Photos by email, if that is easy
- The rough size of the job
- How we’d reach the joints
- The address or postcode of the job
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Micklefield Green homes and the weather
With historic houses such as Chenies Manor House (about 2 miles west) nearby, there’s older building stock in the area around Micklefield Green as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is 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 Chorleywood station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. For site and facilities teams at buildings such as Sarratt Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as Church of the Holy Cross, the joint between an old wall and a newer frame is usually the first place rain gets in.
Micklefield Green is about 3 miles north of Rickmansworth, in Hertfordshire. From the centre of Micklefield Green to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Micklefield Green is one of 381 towns and villages in Hertfordshire we cover for sand mastic. There’s also a page for London, roughly 21 miles from Micklefield Green.
Work in WD3 is quoted and booked the same way as anywhere else. Neighbouring places we cover for sand mastic include Sarratt (1 mile north-west), Chandler's Cross (1 mile east), Loudwater (1 mile south), Bucks Hill (1 mile north) and Chorleywood West (2 miles south). Further out, we also cover Watford (4 miles east), Hemel Hempstead (6 miles north), St Albans (9 miles north-east), Welwyn Garden City (15 miles north-east), Harpenden (11 miles north-east) and Hatfield (12 miles north-east).
Near you in Micklefield Green
We work in homes and buildings around St Clement Danes School, York House School and The Cock Public House. The nearest railway station is Chorleywood station, roughly 2 miles south-west. Well-known places in the area include Leavesden Hospital (3.9 miles north-east) and Chiltern Open Air Museum (3.6 miles south-west). The countryside around Micklefield Green includes Tumbling Bay and Chorleywood Common.
Why deal with it now?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. Older cottages and farmhouses around Micklefield Green can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not guesswork. That’s why we ask about the job first.
What you get with us
- A 12-month guarantee on all work
- Neat joints and a tidy finish
- An ARBOMaster approved applicator
- Homes, businesses and hotels
How to look after the new joints
To keep the joints looking good and working properly:
- Look over the window mastic once a year
- Have rotten timber repaired before new mastic goes in
- Don’t paint over the new mastic
- Avoid heavy scraping on the mastic joint
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.