Greater London · England
North Ockendon Sand Mastic
Professional sand mastic in and around North Ockendon, with old sealant always removed completely and a 12-month guarantee.
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
- Mastic round period door frames that has failed
Sand mastic in North Ockendon: local notes
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. Historic houses like Hare Hall (about 4.5 miles north-west) are a reminder that the area around North Ockendon 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.
North Ockendon is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as The James Oglethorpe Primary School, its window and door frames need their mastic kept sound, just like a home’s.
North Ockendon is about 3 miles east of Hornchurch, in Greater London. Homes, rented property, offices and hotels in North Ockendon is covered for sand mastic. The work is guaranteed for a year. North Ockendon is one of 764 towns and villages in Greater London we cover for sand mastic. You can also see our page for Chelmsford, roughly 16 miles from North Ockendon.
Jobs for sand mastic in RM14 is quoted and booked the same way as anywhere else. We also cover the places around North Ockendon: Puddle Dock (1 mile north), Cranham (2 miles north-west), Upminster (2 miles north-west), South Ockendon (2 miles south) and Upminster Bridge (2 miles north-west). Larger places within reach include Walthamstow (14 miles west), Whitechapel (15 miles west), Orpington (14 miles south-west), Plaistow (11 miles west), Leyton (13 miles west) and New Cross (15 miles west).
Local landmarks in North Ockendon
Around North Ockendon, our work takes us to homes and buildings near Eastbrook School and the streets around them. The nearest railway station is Ockendon station, roughly 1.5 miles south. Other landmarks nearby include Upminster Tithe Barn Museum of Nostalgia (2.1 miles north-west) and St George's Hospital (3 miles west). For a walk, there’s Cranham Marsh.
Sand mastic in North Ockendon, done properly
Across North Ockendon, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We work on stone surrounds, timber door frames and tenement windows, and people most often call us about cement or filler used on old window joints that has cracked and gaps between timber frames and stone or brick.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking, and access in North Ockendon is something to talk through when you book.
You are covered for a year from the day we finish. If anything isn’t right with it, ring 0345 464 0079 or email us.
- Location
- North Ockendon (RM14)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Also near North Ockendon
More services for North Ockendon
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to a full day, depending on how many windows, and the area is left clean. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in North Ockendon. It helps if you can point us to a visitor permit or a bay close to the door.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- 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.
How to prepare
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- Let us know about stairs, lifts or work at height
How to get a quote
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Read more
Common questions in North Ockendon
Can you do sand mastic in North Ockendon?
Yes. We work across London and the South East, and North Ockendon is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Can parking be tricky for a visit in North Ockendon?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Is the work guaranteed?
Every job comes with our one-year guarantee.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and shaped to suit the surround.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. The old silicone has to come out completely so the mastic beds in well.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
What the job involves on each surface
Timber door frames
Round a period front door, sand mastic gives the right look.
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
What affects the quote in North Ockendon
Call for a quick quote. What matters most is:
- Any working-time requirements on site
- The amount of work
- The number of rooms or windows
- Access and height
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Asking for a quote
To help us quote quickly, please include:
- The rough size of the job
- Where the property is
- Access, such as stairs, a lift or height
- The problem you’ve noticed
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or email us.
Common problems we fix in North Ockendon
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber, and they normally need raking out.
Any of these means the joints need attention:
- Wind and rain getting in round a sash window
- Cracked mastic round a front door frame
- Mastic dropping out of the joint
- Gaps where the frame meets the masonry
If you let a flat or house near Ockendon station, any sash windows need sound mastic to keep draughts and rain out.
What your quote should include
- How much experience the applicator has
- How long to leave it before use
- What product goes in the joint
- How hidden problems are handled
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Do not run silicone over sand mastic
- Get any rot dealt with first
- Take care around the mastic when scraping paint
- Inspect the joints round the windows every year or so
Do not touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Honest limits
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Decisions on consent for listed homes
- Sashes that rattle, stick or won’t open
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Sash and case windows
- Timber door frames
- Period & listed homes
- Tenement windows
- Stone surrounds
- Brick reveals