Greater London · England
Sand Mastic specialist in Havering-atte-Bower
Sand mastic in Havering-atte-Bower from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Draughts and rain around sash boxes
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
Surface by surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Sand mastic in Havering-atte-Bower, done properly
Sand mastic suits most period window surrounds. Newer frames generally get a flexible sealant instead and we will explain which is best for yours. We work on tenement windows, timber door frames and period & listed homes, and the jobs we see most are gaps where the frame meets the masonry and mastic round period door frames that has failed. Some people call us the mastic man, others the silicone man or the sealant specialist; in Havering-atte-Bower, the job is the same: proper preparation and the right sealant for every joint.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in Havering-atte-Bower as anywhere.
Each job carries a 12-month guarantee.
- Where
- Havering-atte-Bower (RM4)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Call
- 07833 053749
- Last updated
- 26 October 2026
Common problems we fix in Havering-atte-Bower
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
People usually contact us when they notice one of these:
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
- Open joints round the window box
- Tired mastic found when preparing windows for paint
In the older streets around Church of St John the Evangelist, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- What insurance they hold
- What happens if the job turns out different
- Who turns up on the day
- Whether all the old sealant comes out first
Landlords, agents and businesses in Havering-atte-Bower
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Havering-atte-Bower, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Why act early in Havering-atte-Bower
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in, and renewing the mastic closes them. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler for homes in Havering-atte-Bower.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Old sealant always removed completely
- Trusted Arbo and Everbuild sealants
- A 12-month guarantee on all work
Take a look at our cost guide or customer reviews.
Places near Havering-atte-Bower
Other services in Havering-atte-Bower
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Have rotten timber repaired before new mastic goes in
- Sort the mastic before the decorators arrive
- Avoid heavy scraping on the mastic joint
- Keep modern sealant off the mastic
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.
What sealant work cannot fix
We won’t take on work that will not last, so these are the limits:
- Sash cords, weights and draught-proofing of the sashes
- Cracked or broken glass
- Damaged stone surrounds
If in doubt, call 07833 053749 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Stone surrounds
- Timber door frames
- Tenement windows
- Brick reveals
- Sash and case windows
- Period & listed homes
Havering-atte-Bower questions
Is Havering-atte-Bower in your area for sand mastic?
Yes. We work across London and the South East, and Havering-atte-Bower is part of that. You can call 07833 053749 or email us and let us know what needs doing, and we’ll give you a clear price.
Is parking a problem for a job in Havering-atte-Bower?
Parking in Havering-atte-Bower, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can tenants book the work?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can you match the sealant colour?
Generally, yes. White, clear and grey are common, and other colours are available for many products, and we’ll agree it with you first.
Do you guarantee sand mastic work?
All our work has a one-year guarantee.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator.
Do you work for letting agents?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
Windows and doors in Havering-atte-Bower
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
Havering-atte-Bower 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 Dame Tipping Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Havering-atte-Bower is about 3 miles north-west of Harold Wood, in Greater London. Wherever you are in the RM4 postcode area, we can carry out sand mastic at your property. Havering-atte-Bower is one of 786 places in Greater London where we work.
All of RM4 is covered for sand mastic, from the main roads to the quietest streets. You’ll find streets such as North Road, Broxhill Road and Bower Farm Road, all of which we cover. We also cover Chase Cross (1 mile south-west), Stapleford Abbotts (1 mile north-west), Redbridge (2 miles west), Lambourne End (2 miles west) and Lambourne (3 miles north-west). Within a short drive, we also cover London (15 miles south-west), St Pancras (15 miles south-west), Shoreditch (13 miles south-west), Walthamstow (9 miles west), Hoxton (13 miles south-west) and Whitechapel (13 miles south-west).
Local landmarks in Havering-atte-Bower
Typical jobs here are in homes near The Top Oak pub, Havering Country Park and Bower Park Academy. The nearest railway station is Harold Wood station, roughly 2.7 miles south-east. Well-known places in the area include Romford Shopping Hall (2.8 miles south) and Harold Wood Hospital (2.5 miles south-east). Open spaces near Havering-atte-Bower include Bedfords Park.
How it works
When we arrive, we start by going over the job with you. Surfaces next to the work are protected before work begins. Most jobs take a few hours per window, depending on the condition of the joints. In Havering-atte-Bower, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
Getting a quote
For a quote, call 07833 053749 or email us with the location and a short description of the problem. You’ll have a clear quote before we start.