Greater London · England
Feltham New Build Mastic
New build mastic in Feltham from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Kitchen sealant that has pulled off the wall
- New-build shower sealant that has already split
- Internal frame sealant that has split
New build mastic in Feltham
Snagging sealant properly means taking the failed bead out completely. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. We work on windows & doors, show homes and skirting & floors, and common reasons people get in touch are untidy sealant flagged on a snagging list and skirting joints opening in the first winter.
Across London, commercial floors have movement joints that break down under heavy foot traffic, while new homes need a neat, sound finish around frames, baths and kitchens before handover, in Feltham and beyond.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Feltham (TW14, TW13)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Feltham
Housing providers, facilities teams and property managers book us too in Feltham and across Greater London. Several sites can go on one quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Surface by surface
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing.
Skirting and floors
Gaps under skirting are one of the most common new-build snags. A flexible sealant closes it without cracking like caulk.
What else we do in Feltham
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Structural cracks in walls or ceilings
- Leaks from pipes, valves or wastes, which need a plumber
- A tray or bath that is not properly supported, until it’s fixed
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before you book.
Surfaces we seal
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Windows & doors
- Show homes
- Kitchens
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Record problems with dated photos
- Use the extractor fan every time you shower
- Raise failed sealant with the developer while you’re covered
- Follow the cure time we give you
Keep an eye on the joints over the first couple of years. Small gaps can appear as the house dries and can be resealed later.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
Your questions about new build mastic in Feltham
Can you help a landlord with a rental near Feltham station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover Feltham for new build mastic?
Yes. Our work covers London and the South East, and Feltham is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear price.
Should I go to my builder first?
Your builder, if you’re still in their snagging or warranty period. If that doesn’t work out, we’re happy to quote.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
How long will you be here?
That depends on how much there is to do, but as a guide it takes a few hours for most snagging lists, longer for a run of plots. We will tell you when we quote.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Feltham and the rest of Greater London.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
Joints and finishes in Feltham homes
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. 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.
Feltham is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Feltham is about 6 miles south-west of Ealing, in Greater London. Feltham gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Feltham is one of 764 towns and villages in Greater London we cover for new build mastic. London is on our list too, about 14 miles from Feltham.
Here we cover the TW14 and TW13 postcode area for new build mastic. Whether your property is on High Street, Railway Terrace and Sandycombe Road or a nearby road, we can help. Being close to the A244 and B377, Feltham is easy for our applicators to reach for new build mastic. We also cover Bedfont (1 mile west), Hounslow (1 mile south-west), Hatton (1 mile north), Ashford Common (2 miles south-west) and Cranford (2 miles north). We also work in nearby towns such as London (14 miles east), City of Westminster (12 miles east), Marylebone (12 miles north-east), Kensington (10 miles east), St Pancras (14 miles north-east) and Shoreditch (15 miles east).
Landmarks near Feltham
Typical jobs here are in homes near Hounslow Heath, Moon On The Square pub and Rivers Academy West London, among other places. There’s a railway station in Feltham itself: Feltham station. A little further out are Hounslow Hospital (2.3 miles north-east) and Kempton Steam Museum (1.6 miles south). Green spaces nearby include Richmond Hill and Pevensey Road Nature Reserve.
What we’re called out for in Feltham
On many sites, sealant goes on in the final rush before handover. Joints are not always cleaned of dust or primed, and the sealant sits on grit instead of the surface.
Keep an eye out for any of the following:
- Skirting joints opening in the first winter
- Joints pulling apart as timber shrinks
- Leaking shower tray seals in a new home
- Plot mastic for developers ahead of handover
If you’ve bought a new home near Feltham station, the sealant around baths, showers and frames is worth checking in the first year or two.
Questions to ask before you book
- What the quote includes, VAT included or not
- How the colour is chosen
- What guarantee comes with the work
- Whether they’re fully insured
How it works
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take a few hours for most snagging lists, longer for a run of plots, and we tell you how long to leave it before we go. In Feltham, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely, with no layer left behind.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Tell us about any water getting in
- On commercial sites, let us know about site rules
- Mention any tricky access
How to get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Why it’s worth doing now in Feltham
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Resealing promptly protects the new finishes around it. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Feltham.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why Feltham clients choose us
- Neat joints and a tidy finish
- A 12-month guarantee on all work
- Old sealant always removed completely
- Domestic, commercial and hotel work
Take a look at our cost guide or what customers say.