Greater London · England
New Build Mastic in Southall
New-build sealant joints in Southall need attention? We remove the old material, prepare the joints and seal them properly.
- Messy sealant that spoils new finishes
- Cracked sealant around new window and door frames
- Kitchen sealant that has pulled off the wall
How we handle new build mastic in Southall
Some new-home owners let the house settle before resealing. For small cosmetic gaps, that is reasonable, but a seal that is letting water through needs doing now. We work on windows & doors, kitchens and plot handovers, and people most often call us about smeared, uneven beads picked up at snagging and gaps between new skirting and floors.
New flats are going up across London, many of them in larger developments. Snagging there often goes through the developer or managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
All of our work is guaranteed for twelve months.
- Where
- Southall (UB2, UB1, UB6, W7)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
A few problems are outside what sealant work can do:
- Movement caused by a poorly fitted tray or bath
- Broken tiles or a split tray
- Plumbing faults behind the sealant
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
Joints and surfaces we work on
- Show homes
- Bathrooms & en suites
- Windows & doors
- Kitchens
- Skirting & floors
- Plot handovers
What the job involves on each surface
Show homes
We seal show-home bathrooms, kitchens and frames. We will plan around viewing times.
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. It’s resealed with an exterior sealant suited to the frame and wall.
How it works
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take anything from a few hours to several days, depending on the number of plots, and we explain the cure time before we leave. In a London area like Southall, 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.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- 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.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
Getting a quote
Every job is quoted individually. Just call 0345 464 0079 or drop us an email with the details, and pictures are welcome.
Advice
Quotes for new build mastic in Southall
Jobs vary more than people expect. What affects the quote:
- Working hours on commercial sites
- Access and height
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
What we need to know
Before you ask for a quote, have a think about:
- If someone has resealed it before
- A few pictures by email, if you can
- The problem you’ve noticed
- How we’d reach the joints
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.
Towns and villages near Southall
What else we do in Southall
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Open a window or run the fan after bathing
- Follow the cure time we give you
- Do not wait for the house to settle if water is getting through
- Record problems with dated pictures
Leave the sealant for the cure time we give you before showering or bathing. Silicone is normally left for about a day to cure enough for use.
Early snagging is easier snagging. Small faults turn into leaks if left.
Southall questions
Do you work for landlords with property near Southall station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can ring 0345 464 0079 or email us with the details for a clear quote.
Can you do new build mastic in Southall?
Yes. Our work covers London and the South East, and Southall is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear quote.
Do you work for developers?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send us the plot schedule and we’ll quote.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, wherever you are.
How long does the job take?
Typically it takes a few hours in a single home. Larger jobs naturally take longer, and we’ll tell you how long to expect.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we are done.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Leave it or put it right?
Sealant done properly at handover means fewer callbacks. Every return visit for a failed seal takes time and most come down to preparation. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Southall, the repair is bigger than a sealant job.
Doing several joints on one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
Why Southall customers choose us
- An ARBOMaster approved applicator
- Every job guaranteed for a year
- Neat joints and a tidy finish
- Sealant colour chosen to suit
Read our cost guide and what customers say.
New build mastic around Southall
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent.
Southall is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For new homes near Southall station, it’s worth checking the sealant early, while snags are still fresh.
Southall is about 3 miles west of Ealing, in Greater London. Homes, rented property, offices and hotels in Southall can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. We cover 764 towns and villages across Greater London. Our London page covers work nearby, about 12 miles away.
We cover every part of UB2, UB1, UB6 and W7 for new build mastic and the streets around it. Whether your property is on Uxbridge Road High Street, Emerald Square and Randolph Road or a nearby road, our applicators can take on the job. We also cover Dormers Wells (1 mile north-east), West Ealing (2 miles east), Yeading (2 miles north), Yiewsley (2 miles north) and Hanwell (2 miles east). Further out, we also cover London (12 miles east), City of Westminster (10 miles east), Marylebone (10 miles east), Kensington (8 miles east), St Pancras (11 miles east) and Shoreditch (13 miles east).
Around Southall
Typical jobs here are in homes near Minet Country Park, Glassy Junction pub and Villiers High School and the streets around them. Southall has its own railway station: Southall station. Other landmarks nearby include Treaty Centre (2.8 miles south) and Museum of Army Music (3.8 miles south). Green spaces nearby include Northala Fields and Middle Lake.
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
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 does not work out, we can still put it right.