Greater London · England
Hornchurch New Build Mastic
Specialist new build mastic for Hornchurch: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Shower seals failing in the first year or two
- Gaps opening as the house dries out and settles
- Skirting joints opening in the first winter
Aftercare tips
To keep the joints looking good and working properly:
- Follow the cure time we give you
- Avoid scourers and strong chemicals on sealant
- Report sealant problems to your builder during the snagging period
- Don’t seal over failed sealant yourself
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant.
New build mastic for homes and businesses in Hornchurch
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. If you are still within the builder’s snagging or warranty period, tell them first and if that stalls, we can do it. We are often asked to deal with shower seals failing in the first year or two and untidy sealant flagged on a snagging list, on bathrooms & en suites, skirting & floors and plot handovers.
London homes range from new-build flats to period conversions with new floors laid over old boards. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
Each job carries a 12-month guarantee, large or small.
- Place
- Hornchurch (RM12, RM11, RM14, RM1)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Hornchurch
More services for Hornchurch
New build mastic around Hornchurch
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Emerson Park station, the sealant around baths, showers and frames is worth checking in the first year or two. Hornchurch is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Hornchurch is about 6 miles south-west of Brentwood, in Greater London. Whether you’re in the middle of Hornchurch or further out, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, and Hornchurch is one of them. Our London page covers work nearby, about 14 miles away.
Here we cover the RM12, RM11, RM14 and RM1 postcode area for new build mastic. If you need new build mastic at a property on High Street, The Avenue and Stanley Road or anywhere close by, our applicators can take on the job. Hornchurch is on the A125, which makes it straightforward to reach. If you’re just outside Hornchurch, we cover Upminster Bridge (1 mile east), Heath Park (1 mile north-west), Emerson Park (1 mile north-east), Hacton (2 miles south) and Ardleigh Green (2 miles north). Further out, we also cover London (14 miles west), St Pancras (14 miles west), Shoreditch (13 miles west), Walthamstow (10 miles west), Hoxton (13 miles west) and Whitechapel (13 miles west).
Local landmarks in Hornchurch
Typical jobs here are in homes near Abbs Cross Academy and Arts College, J.J. Moon's pub and St. Andrew's Park. The nearest railway station is Emerson Park station, roughly 0.7 miles north of the centre. Nearby you will also find Upminster Tithe Barn Museum of Nostalgia (1.9 miles east) and The Brewery (1.8 miles north-west). Not far away are Hornchurch Cutting.
Hornchurch questions
Is Hornchurch in your area for new build mastic?
Yes, Hornchurch is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
I let a flat near Emerson Park station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient.
Should I wait before resealing?
That depends on the joint. Failed seals in wet areas need doing now, while small cosmetic gaps can wait a while.
Is there any odour?
Some sealants have a smell while they cure. Ventilation helps.
How do I get a quote for new build mastic in Hornchurch?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
Where do you work from?
Mr Mastic is based in Crawley. We cover Hornchurch and the rest of Greater London.
What colour sealant will you use?
That depends on what the joint meets: white or clear in most bathrooms, and a colour to suit worktops, frames and floors elsewhere. We’ll agree it with you first.
What affects the cost of new build mastic
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- How easy the joints are to reach
- Any mould that needs treating
- The type of sealant required
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
What we need to know
There’s no need for technical detail. Just tell us:
- The rough size of the job
- Where the property is
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Movement caused by a poorly fitted tray or bath
- Your warranty claim itself, which is between you and the builder
- Plumbing faults behind the sealant
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Joints and surfaces we work on
- Skirting & floors
- Plot handovers
- Show homes
- Kitchens
- Bathrooms & en suites
- Windows & doors
How the visit works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the number of plots. In Hornchurch, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we are working on
- Keep pets and children clear of the area while we work
Getting a quote
For new build mastic in Hornchurch, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Related advice
Different surfaces, different methods
Skirting and floors
Where the floor meets a bath panel or kitchen plinth, the joint keeps mop water out. They get a flexible, water-resistant sealant.
Kitchens
Worktops in new homes can move slightly as the house dries, which opens gaps along the back. We reseal them with a flexible sealant.
What happens if it’s left?
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
Why choose Mr Mastic in Hornchurch
- Colour agreed with you before work begins
- 12-month guarantee on every job
- Quality sealants from Arbo and Everbuild
- Sanitary silicone with an anti-fungal additive in wet areas
Read how sealant jobs are priced and customer reviews.
DIY sealant or a professional job?
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.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.