Greater London · England
New-build mastic & snagging in Rainham, Greater London
New build mastic across Rainham and nearby, with old sealant always removed completely and a 12-month guarantee.
- Kitchen sealant that has pulled off the wall
- Second-fix sealing on new plots
- Cracks appearing as a new home settles
What we can’t put right
We won’t take on work that won’t last, so here’s what sealant cannot put right:
- Cracking that points to a structural problem
- Deciding who is responsible under a builder’s warranty
- A tray or bath that isn’t properly supported, until it’s fixed
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before booking.
Surfaces we seal
- Plot handovers
- Show homes
- Bathrooms & en suites
- Kitchens
- Windows & doors
- Skirting & floors
About our new build mastic in Rainham
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. We are often asked to deal with frame joints opening as the plaster dries and second-fix sealing on new plots, across skirting & floors, kitchens and show homes.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
You get a one-year guarantee, the same in Rainham as everywhere else we work.
- Where
- Rainham (RM13)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Rainham questions
Is Rainham in your area for new build mastic?
Yes. Our work covers London and the South East, and Rainham is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Can you help a landlord with a rental near Rainham (Essex) station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Why has my new-build shower seal failed already?
Cracking in the first couple of years is common as timber and plaster dry out. Rushed application on dusty surfaces makes it worse.
Can you work from my snagging list?
Yes. Send it with photos and we will quote for the sealant items. Items that need a plumber, tiler or the builder are flagged.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you when we finish.
What do you need from me for a quote?
Let us know what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
What happens on the day
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours in a single home, including the tidy-up. In a London area like Rainham, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
Getting a quote
Want a quote for new build mastic? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear price before work begins.
Read more
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
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.
Landlords, agents and businesses in Rainham
Landlords and letting agents in Rainham can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
If you manage several properties in or around Rainham, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Different surfaces, different methods
Plot handovers
Developers can send the plot schedule and specification for a quote. We seal bathrooms, kitchens, frames and floors to the agreed spec.
Kitchens
Sink joints are wet all the time. A kitchen sealant goes in there suited to the job.
Joints and finishes in Rainham homes
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Rainham (Essex) station, the sealant around baths, showers and frames is worth checking in the first year or two.
Rainham is about 4 miles south of Romford, in Greater London. Wherever you are in the RM13 postcode area, we cover new build mastic for homes and businesses. Rainham is one of 764 places in Greater London where we work for new build mastic. We also work in London, about 13 miles from Rainham.
All of RM13 is within our area for new build mastic, from the main roads to the quietest streets. If you need new build mastic at a property on New Road, Ferry Lane and Wantz Lane or a nearby road, we can help. If you are just outside Rainham, we cover South Hornchurch (1 mile north-west), Beam Park (1 mile west), Hornchurch Marshes (1 mile west), Dagenham Green (2 miles west) and Elm Park (2 miles north). Larger places within reach include London (13 miles west), City of Westminster (15 miles west), Marylebone (15 miles west), St Pancras (13 miles west), Shoreditch (12 miles west) and Walthamstow (11 miles north-west).
Near you in Rainham
Around Rainham, our work takes us to homes and buildings near Harris Academy Rainham, The Chafford School and The Phoenix pub, among other places. There’s a railway station in Rainham itself: Rainham (Essex) station. A little further out are St George's Hospital (2.3 miles north-east) and Erith Museum (2.6 miles south). Open spaces near Rainham include Ingrebourne Marshes.
Towns and villages near Rainham
Also in Rainham
Do you need new build mastic in Rainham?
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints aren’t always given time to dry first.
People usually contact us when they notice something like this:
- Cracked sealant around new window and door frames
- Gaps between new skirting and floors
- Messy sealant that spoils new finishes
- Shower seals failing in the first year or two
As a London address, Rainham can be tricky for parking: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- What preparation is included
- Whether they’re fully insured
- Which colour the sealant will be
- Whether all the old sealant comes out first
Why deal with it now?
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. 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. Putting it right early is much less trouble for homes in Rainham.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What you get with us
- An ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
- A 12-month guarantee on all work
- White, clear, grey or coloured to suit, where the product allows
Take a look at our cost guide or what customers say.