Greater London · England
Paddington Green New Build Mastic
Our applicators work in Paddington Green on plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly.
- Gaps behind new kitchen upstands
- Leaking shower tray seals in a new home
- Sealant that never bonded to the surface
New build mastic in Paddington Green, done properly
Snagging sealant properly means taking the failed bead out completely. Fresh silicone can’t bond to the old layer, so it all comes out before we clean, dry and reseal. Common call-outs are for sealant work across a run of new homes and cracked sealant around new window and door frames, on plot handovers, skirting & floors and windows & doors.
Much of London’s new housing is flats in larger developments. Snagging there often goes through the developer or managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Paddington Green (W2, W1H, NW8)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Housing providers, facilities teams and property managers book us too in Paddington Green and across Greater London. We can quote a run of properties together.
Common problems we fix in Paddington Green
The wrong product is sometimes used in the wrong place: decorators’ caulk in a wet area, or a stiff sealant where there’s movement. Both fail early.
Most people get in touch when they notice one of these:
- Plot mastic for developers ahead of handover
- Skirting joints opening in the first winter
- Messy sealant that spoils new finishes
- New-build shower sealant that has already split
If you’ve bought a new home near London Paddington station, the sealant around baths, showers and frames is worth checking in the first year or two.
Comparing quotes
- Is the old sealant removed completely?
- What preparation is included
- What happens if they find a problem under the old sealant
- Whether they’re fully insured
When something else is needed
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Baths and trays that move too much for sealant to cope with
- Plumbing faults behind the sealant
- Structural cracks in walls or ceilings
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly.
Joints and surfaces we work on
- Skirting & floors
- Windows & doors
- Show homes
- Bathrooms & en suites
- Kitchens
- Plot handovers
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours in a single home and we leave things clean and tidy. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Paddington Green. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
Every job is quoted individually. Simply ring 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Related advice
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Ventilate bathrooms well, especially in the first year
- Report sealant problems to your builder during the snagging period
- Look at the sealant regularly in the first couple of years
- Avoid scourers and strong chemicals on sealant
Keep the bathroom ventilated, especially in the first year. Run the fan or open a window after bathing to help keep mould away.
Lifting sealant traps moisture and mould behind it. Resealing before mould gets in keeps the job straightforward.
Places near Paddington Green
More services for Paddington Green
What new build mastic looks like in Paddington Green
Rainfall in the South East is lower than in much 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 snagging may go through the developer or managing agent.
As a London address, Paddington Green can be tricky for parking: let us know about parking bays, permits or a driveway.
Paddington Green is about 1 mile north-west of City of Westminster, in Greater London. Whether you’re in the middle of Paddington Green or further out, we cover new build mastic for every kind of property. Across Greater London, we cover 764 places, Paddington Green among them.
Work in W2, W1H and NW8 works the same way as everywhere else we cover. Streets in the area include Harrow Road, Craven Road and Lanark Road, and we cover them all. Paddington Green sits on or near the A5 and A40. Other places close to Paddington Green include Paddington (1 mile south-east), Little Venice (1 mile west), Lisson Grove (1 mile north-east), Hyde Park Estate (1 mile south-east) and Connaught Village (1 mile south-east). Larger places within reach include London (4 miles south-east), St Pancras (3 miles east), Shoreditch (4 miles east), Walthamstow (8 miles north-east), Hoxton (4 miles east) and Whitechapel (5 miles east).
Local landmarks in Paddington Green
We work in homes and buildings around Royal Society of Medicine Library, International Community School and Sir Alexander Fleming pub and the streets around them. You will also find North Westminster Community School (less than half a mile east) and Kensington Gardens (0.9 miles south). Paddington Green has its own railway station: London Paddington station. Well-known places in the area include Harrods (1.5 miles south) and London Toy & Model Museum (0.6 miles south-west). Not far away are The Long Water and Greville Place nature reserve.
Your questions about new build mastic in Paddington Green
Can you help a landlord with a rental near London Paddington station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Is parking a problem for a job in Paddington Green?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages to suit the site.
What does new build mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints.
Why has my new-build shower seal failed already?
There are generally two causes: the house moving as it dries, and sealant that never bonded properly. Cutting it out and resealing properly fixes both.
Can you reseal over the builder’s sealant?
No. Over-sealing traps mould and water and soon fails. We remove every bit of the old bead before resealing.
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Why act early in Paddington Green
DIY kits do not solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Cutting out, cleaning and priming are what make the difference. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Paddington Green, the repair is bigger than the sealant job would have been.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
Why us?
- Rated 4.9 stars on Google
- Every job guaranteed for a year
- Colour agreed with you before we start
- Fully insured
See our cost guide or customer reviews.