Greater London · England
Sand Mastic in Fullwell Cross
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Fullwell Cross, with a 12-month guarantee on every job. Call for a quick quote.
- Window mastic to renew ahead of painting
- Crumbling sand mastic round a window
- Gaps where the frame meets the masonry
Different surfaces, different methods
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.
About our sand mastic in Fullwell Cross
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on stone surrounds, brick reveals and tenement windows, and people most often call us about a silicone bead on a sash window that spoils the look and mastic worn away on windows facing the weather. As specialist sealant applicators, we take on sand mastic and every other kind of sealant job in Fullwell Cross.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
You get a one-year guarantee, the same in Fullwell Cross as everywhere else we work.
- Place
- Fullwell Cross (IG6, IG5, IG7)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 07833 053749
- Updated
- 26 October 2026
Towns and villages near Fullwell Cross
More services for Fullwell Cross
What we do, step by step
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours per window, depending on the condition of the joints. In Fullwell Cross, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
- Plan for the work area to be out of bounds to pets and children
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, call 07833 053749 or email us.
Related advice
Signs you need sand mastic in Fullwell Cross
Water gets into small cracks in the mastic and pushes it out. Windows facing the weather tend to go first.
Keep an eye out for any of the following:
- Wind and rain getting in round a sash window
- Weathered mastic on the most exposed windows
- Mastic dropping out of the joint
- Silicone on a period window that looks wrong
Homes close to St Francis of Assisi include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- When the joint can take water or movement
- What insurance they hold
- Whether they seal over old material or remove it
- What happens if they find a problem under the old sealant
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How to look after the new joints
A little care helps the new joints last. Our advice:
- Get any rot dealt with first
- Leave the new mastic unpainted
- Look over the window mastic once a year
- Keep sills and gutters clear so water drains away
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall, so renewing it early is worth it.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
What sand mastic looks like in Fullwell Cross
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. Historic houses like Valentines Mansion (about 1.8 miles south-west) are a reminder that the area around Fullwell Cross 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 is traditional sand mastic.
Schools such as Clore Tikva School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. As a London address, Fullwell Cross can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Fullwell Cross is about 2 miles east of Woodford, in Greater London. Homes, rented property, offices and hotels in Fullwell Cross is covered for sand mastic. The work is guaranteed for a year. Our Greater London coverage runs to 786 places, and Fullwell Cross is one of them.
We cover every part of IG6, IG5 and IG7 for sand mastic. If you need sand mastic at a property on Horace Road, High Street and Sydney Road or anywhere close by, we can help. Other places close to Fullwell Cross include Fairlop (1 mile north), Barkingside (1 mile south), Newbury Park (1 mile south), Gants Hill (1 mile south) and Redbridge (2 miles south-west). Within a short drive, we also cover London (10 miles south-west), City of Westminster (12 miles south-west), Marylebone (11 miles south-west), Kensington (14 miles south-west), St Pancras (10 miles south-west) and Shoreditch (8 miles south-west).
What’s near Fullwell Cross
In Fullwell Cross, that means homes and buildings near Kantor King Solomon High School, Fairlop Waters and The New Fairlop Oak pub. For rail, the closest station is Seven Kings station, roughly 2.3 miles south. Other landmarks nearby include Redbridge Museum (2.6 miles south) and Claybury Hospital (0.8 miles north-west). The countryside around Fullwell Cross includes Hainault Lodge and Highams Park Lake.
Why deal with it now?
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 a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
What you get with us
- 20+ years of sealant experience
- One-year guarantee on every job
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
Take a look at our cost guide or what customers say.
Questions from Fullwell Cross
Do you cover Fullwell Cross for sand mastic?
Yes, Fullwell Cross is within the area we cover. We work across London and the South East. You can phone 07833 053749 or drop us an email and let us know what needs doing, and we will give you a clear quote.
Can you help a landlord with a rental near Seven Kings station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 07833 053749 or email us with the address and what needs doing, and we will send you a clear quote.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we are using and why.
Where is Mr Mastic based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
What do you need from me for a quote?
Tell us what needs doing and where, with photos by email if possible. We will ask anything else we need to know.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.