Greater London · England
Dormers Wells New Build Mastic
New-build sealant joints in Dormers Wells need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Sealant that never bonded to the surface
- Leaking shower tray seals in a new home
- Frame joints opening as the plaster dries
Dormers Wells questions
Can you help a landlord with a rental near Southall station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Is Dormers Wells in your area for new build mastic?
Yes. Our work covers London and the South East, and Dormers Wells is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
How much does new build mastic cost in Dormers Wells?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Why has my new-build shower seal failed already?
It’s common, and there are normally two reasons: movement as the house dries and settles, and sealant laid onto dust without primer. Cutting it out and resealing properly fixes both.
How long does new build mastic take?
As a guide, most jobs take a few hours in a single home. Bigger jobs take longer, and we’ll say how long yours will take.
Where do you work from?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
About our new build mastic in Dormers Wells
Developers send us the plot schedule and we work through it. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover using the right product for each joint. If you are dealing with frame joints opening as the plaster dries and untidy sealant flagged on a snagging list, we can help, on windows & doors, kitchens and plot handovers alike.
New flats are going up across London, many of them in larger developments. In a new development, snags are often reported through the developer or the managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
All our work comes with our 12-month guarantee.
- Where
- Dormers Wells (UB1, UB6, UB2)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for new build mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The old material and how stubborn it is
- The product the joint needs
- The number of rooms or windows
- Any mould that needs treating
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What we need to know
When you call or email, it’s useful to know:
- A few pictures by email, if you can
- Where the property is
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or send us an email.
More services for Dormers Wells
Leave it or put it right?
Resealing everything on a snagging list in one visit is generally simpler than chasing joints one at a time. You get one visit and one clear quote to plan around. In a flat in Dormers Wells, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Why us?
- 4.9 on Google from 180+ five-star reviews
- White, clear, grey or coloured to suit, where the product allows
- Colour agreed with you before we start
- Neat joints and a tidy finish
See how sealant jobs are priced and our reviews.
How the job changes by surface
Kitchens
As a new house dries, worktops and walls shift a little, opening gaps behind the upstand. We reseal them with a flexible sealant.
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.
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to several days, depending on the number of plots, and the area is left clean. In Dormers Wells, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We go through the snagging list or plot schedule and agree the joints to do.
- The old bead comes out in full, with no layer left behind.
- Each joint is cleaned of dust and grit, then primed if required.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
Ask for a quote
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You’ll have a clear quote before we start.
Related advice
Honest limits
We will always be straight with you, so here’s what new sealant won’t do:
- Plumbing faults behind the sealant
- Cracked trays, tiles or worktops
- Deciding who is responsible under a builder’s warranty
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Skirting & floors
- Windows & doors
- Show homes
- Bathrooms & en suites
- Kitchens
- Plot handovers
New homes and floors in Dormers Wells
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent.
As a London address, Dormers Wells can be tricky for parking: let us know about parking bays, permits or a driveway. For new homes near Southall station, it’s worth checking the sealant early, while snags are still fresh.
Dormers Wells is about 1 mile north-east of Southall, in Greater London. Dormers Wells gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, and Dormers Wells is one of them. For nearby work, see our London page (12 miles or so).
All of UB1, UB6 and UB2 is within our area for new build mastic, from the main roads to the quietest streets. You’ll find streets such as Swan Road, North Road and Meadow Road, all of which we cover. Main roads around Dormers Wells include the A4020. Other places close to Dormers Wells include Southall (1 mile south-west), West Ealing (1 mile south-east), Hanwell (1 mile south-east), Yeading (2 miles north-west) and Yiewsley (2 miles north-west). We also work in nearby towns such as London (12 miles east), City of Westminster (9 miles east), Marylebone (9 miles east), Kensington (7 miles east), St Pancras (11 miles east) and Shoreditch (12 miles east).
Local landmarks in Dormers Wells
Typical jobs here are in homes near Dormers Wells High School, The Plough pub and Castle Bar Park. The nearest railway station is Southall station, roughly 0.9 miles south-west. A little further out are St Bernard's Hospital (0.9 miles south-east) and Gunnersbury Park House - Large Mansion (3.5 miles east). Green spaces nearby include Northala Fields and Litten Nature Reserve.
Landlords, agents and businesses in Dormers Wells
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
We also work for property managers and facilities teams in Dormers Wells and across Greater London. Several sites can go on one quote, and we’re fully insured for the work.
How to look after the new joints
After the cure time, these simple habits help:
- Avoid running a DIY bead over the old one
- Don’t wait for the house to settle if water is getting through
- Photograph failed sealant before it’s redone
- Wipe joints with warm soapy water
Follow the cure time we give you before the area gets wet. Silicone is normally left for about a day before water reaches them.
A seal that splits early is often a sign of movement. Have it resealed, and the tray or bath checked, before it gets worse.