Greater London · England
New Build Mastic in Gallows Corner
Plot mastic for developers and snagging failed sealant in new homes for Gallows Corner, backed by a one-year guarantee. Ask us for a quote.
- Cracks appearing as a new home settles
- Untidy sealant flagged on a snagging list
- Cracked caulk along new skirting
About our new build mastic in Gallows Corner
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. While the builder’s snagging or warranty period runs, report it to them first. Common call-outs are for untidy sealant flagged on a snagging list and skirting joints opening in the first winter, on skirting & floors, plot handovers and kitchens.
Shops, offices and commercial units across London have hard-wearing floors with movement joints that need resealing as they wear, and new homes need their plot mastic finished properly before handover.
You’re covered for a year from the day we finish. If anything isn’t right with it, phone 0345 464 0079 or email us.
- Where
- Gallows Corner (RM3, RM2, RM11)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Skirting and floors
As timber and screed dry, skirting and floors shift. Caulk cracks; a flexible sealant moves with it painted or coloured to suit.
Windows and doors
On new builds, external frame sealant can be patchy. It’s resealed with an exterior sealant suited to the frame and wall.
Towns and villages near Gallows Corner
What else we do in Gallows Corner
What new build mastic looks like in Gallows Corner
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.
As a London address, Gallows Corner can be tricky for parking: let us know about parking bays, permits or a driveway. If you’ve bought a new home near Gidea Park station, the sealant around baths, showers and frames is worth checking in the first year or two.
Gallows Corner is about 2 miles north-east of Romford, in Greater London. Anywhere in RM3, we cover new build mastic for homes and businesses. We cover 764 towns and villages across Greater London. Our London page covers work nearby (15 miles or so).
Work in RM3, RM2 and RM11 works the same way as everywhere else we cover. You’ll find streets such as Ewan Road, Briar Road and Bell Avenue. If you are just outside Gallows Corner, we cover Gidea Park (1 mile west), Ardleigh Green (1 mile south), Harold Wood (1 mile east), Heath Park (1 mile south) and Emerson Park (1 mile south-east). Further out, we also cover London (15 miles south-west), St Pancras (15 miles west), Shoreditch (13 miles west), Walthamstow (10 miles west), Hoxton (13 miles west) and Whitechapel (13 miles south-west).
Near you in Gallows Corner
In Gallows Corner, that means homes and buildings near Havering College of Further and Higher Education, Ardleigh Green Junior School and Raphael Park and the streets around them. The closest station to Gallows Corner is Gidea Park station, about 0.8 miles south-west. Nearby you will also find Upminster Tithe Barn Museum of Nostalgia (2.6 miles south-east) and Harold Wood Hospital (0.6 miles east). The countryside around Gallows Corner includes Bedfords Park.
The process
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. The work generally takes a few hours for most snagging lists, longer for a run of plots. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- First we work through your snagging list or plot schedule with you.
- Failed or untidy sealant is cut out completely.
- Surfaces are cleaned of building dust and primed where needed.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you are given the cure time.
Before we arrive
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or drop us an email.
Read more
Landlords, agents and businesses in Gallows Corner
We work for landlords and agents as well as householders. Resealing between tenancies keeps a property looking cared for.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Keep water off fresh sealant until it has cured
- Watch for new gaps as the house dries out
- Clean sealant with mild detergent, not abrasives
- Do not wait for the house to settle if water is getting through
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents, which can damage the surface.
Early snagging is easier snagging. Left alone, a small crack can become a leak.
Leave it or put it right?
A hairline gap at a skirting can wait, but water getting through can’t. Not sure whether yours can wait? You can call 0345 464 0079 or drop us an email with a few pictures and we will give you a straight answer. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Gallows Corner.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Gallows Corner
- 180+ five-star Google reviews
- White, clear, grey or another colour, product permitting
- Trusted Arbo and Everbuild sealants
- More than 20 years in sealant work
Questions from Gallows Corner
Do you work for landlords with property near Gidea Park station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is parking an issue for new build mastic in Gallows Corner?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Is there a guarantee?
Yes, always. There’s a 12-month guarantee on every job, large or small.
Can you do plot mastic on a new development?
Yes. We take on second-fix sealant work across new plots. We clean and prime joints properly to keep callbacks down.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we’re done.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we’re using.
Will you just run a new bead over the existing one?
No. We always remove the existing bead, the joint cleaned and primed where needed, and a new bead applied.
What does new build mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
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.
How we quote for new build mastic
For a quick quote, just ask. What matters most is:
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- The number and length of the joints
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, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.