Essex · England
Cannon's Green Sand Mastic
Sand mastic in Cannon's Green from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- A silicone bead on a sash window that spoils the look
- Mastic worn away on windows facing the weather
- Old sand mastic that has cracked, crumbled or fallen out
Sand mastic in Cannon's Green
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. Typical jobs include draughts and rain around sash boxes and cement or filler used on old window joints that has cracked, across stone surrounds, timber door frames and period & listed homes.
Outdoor sealant needs dry, clean surfaces, so work on frames around Cannon's Green is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months.
- Where
- Cannon's Green (CM5)
- Region
- Essex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for sand mastic
Call for a quick quote. What matters most is:
- When we can work, for business premises
- The type of sealant required
- The amount of work
- Whether the work is at height
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What we need to know
When you contact us, it’s useful to know:
- Where the property is
- If someone has resealed it before
- A few photos by email, if you can
- Roughly how big the job is
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will talk you through the work before giving you a price.
Signs you need sand mastic in Cannon's Green
Water gets into small cracks in the mastic and loosens it further. Exposed elevations generally fail first.
Common reasons people contact us include:
- A silicone bead on a sash window that spoils the look
- Gaps where the frame meets the masonry
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
If you look after a building such as The Ongar Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- Which colour the sealant will be
- How long the guarantee is
- What happens if they find a problem under the old sealant
- What product goes in the joint
What we do, step by step
On the day, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before any work starts. Most jobs take anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Cannon's Green, the journey is planned in advance: 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.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
- Move anything stored near the joints
Getting a quote
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and send you a clear quote before work begins.
Advice
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
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.
FAQs for Cannon's Green
Can you do sand mastic in Cannon's Green?
Yes. We work across London and the South East, and Cannon's Green is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear quote.
Is there a guarantee on sand mastic in Cannon's Green?
All our work, in Cannon's Green and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
How do I get a quote for sand mastic in Cannon's Green?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Can you replace silicone on a period window with sand mastic?
In most cases. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Nearby places to Cannon's Green
Also in Cannon's Green
Different surfaces, different methods
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Leave the new mastic unpainted
- Keep modern sealant off the mastic
- Ask a joiner to look at soft timber first
- Sort the mastic before the decorators arrive
Avoid painting over the new mastic, as traditional guidance advises. If you are 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.
Why deal with it now?
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new work lasts. Older cottages and farmhouses around Cannon's Green can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Cannon's Green
- Experience in homes, commercial sites and hotels
- 4.9 on Google from 180+ five-star reviews
- One-year guarantee on every job
- Neat joints and a tidy finish
Read our cost guide or what customers say.
Windows and doors in Cannon's Green
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of St Nicholas, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Cannon's Green is about 7 miles east of Harlow, in Essex. From the centre of Cannon's Green to the outskirts, sand mastic is available for homes and businesses alike. Across Essex, we cover 644 places, Cannon's Green among them. There’s also a page for Chelmsford, about 9 miles away.
All of CM5 is within our area for sand mastic, from the main roads to the quietest streets. Neighbouring places we cover for sand mastic include Fyfield (1 mile north-west), Clatterford End (1 mile north-west), Norton Mandeville (1 mile south), Norwood End (1 mile north) and High Ongar (2 miles south). Within a short drive, we also cover Chelmsford (9 miles east), Basildon (14 miles south-east), Harlow (7 miles west), Brentwood (7 miles south), Billericay (10 miles south-east) and Loughton (11 miles south-west).
What’s near Cannon's Green
In Cannon's Green, that means homes and buildings near Queens Head Public House and the streets around them. Nearby you will also find Willingale Doe (2 miles north-east).