Greater London · England
New Build Mastic in North Wembley
Problem with your new-build sealant joints in North Wembley? We remove the old material, prepare the joints and seal them properly.
- Cracked sealant around new window and door frames
- Sealant applied over dusty or wet surfaces
- Worktop and upstand sealant coming away
How we quote for new build mastic
The quote reflects the job in front of us. We take into account:
- How easy the joints are to reach
- The number of rooms or windows
- The product the joint needs
- Any working-time requirements on site
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
- Whether it has been sealed before
Want a quote for new build mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before we start.
New build mastic in North Wembley
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the sealant actually sticks instead of bonding to the dust. Common call-outs are for leaking shower tray seals in a new home and skirting joints opening in the first winter, on bathrooms & en suites, plot handovers and windows & doors.
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.
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.
- Location
- North Wembley (HA0, HA9, UB6)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Check bath and shower seals every few months as the house settles
- Record problems with dated pictures
- Keep water off fresh sealant until it has cured
- Report sealant problems to your builder during the snagging period
Clean the sealant with a mild detergent and a soft cloth. Keep scourers and harsh chemicals off it, which can damage the surface.
Early snagging is easier snagging. Left alone, a small crack can become a leak in a busy bathroom.
Common problems we fix in North Wembley
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints are not always given time to dry first.
People normally contact us after spotting one of these:
- Frame joints opening as the plaster dries
- Skirting joints opening in the first winter
- Leaking shower tray seals in a new home
- Kitchen sealant that has pulled off the wall
North Wembley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before booking anyone
- How the colour is chosen
- What preparation is included
- How long the guarantee is
- Whether they’re fully insured
The process
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the job takes anything from a few hours to several days, depending on the number of plots in most cases. In a London area like North Wembley, 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.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
How to prepare
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
Getting a quote
For new build mastic in North Wembley, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Advice
New build mastic in North Wembley: local notes
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent. The South East is one of the drier parts 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 Wembley Central station, the sealant around baths, showers and frames is worth checking in the first year or two.
North Wembley is about 2 miles south-east of Harrow, in Greater London. Homes, rented property, offices and hotels in North Wembley is covered for new build mastic, old or new, large or small. The work is guaranteed for a year. Across Greater London, we cover 764 places, and North Wembley is one of them. London is on our list too, about 10 miles from North Wembley.
All of HA0, HA9 and UB6 is within our area for new build mastic. That includes homes and businesses on Elm Road, East Lane and High Road and the roads around them. Main roads around North Wembley include the A4089. Other places close to North Wembley include Brondesbury Park (1 mile north), Sudbury Hill (1 mile west), Sudbury (1 mile west), South Kenton (1 mile north) and Perivale (1 mile south-west). Further out, we also cover London (10 miles south-east), City of Westminster (7 miles south-east), Marylebone (7 miles east), Kensington (6 miles south-east), St Pancras (8 miles east) and Shoreditch (10 miles east).
Landmarks near North Wembley
We work in homes and buildings around Wembley High Technology College, Preston Park and J.J. Moon's pub and the streets around them. There’s a railway station in North Wembley itself: Wembley Central station. A little further out are Clementine Churchill Hospital (1.4 miles north-west) and London Designer Outlet (0.8 miles east). Open spaces near North Wembley include Perivale Wood and Castlebar Hill.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Places near North Wembley
Also in North Wembley
Leave it or put it right?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. In a flat in North Wembley, 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.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, call 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why North Wembley customers choose us
- We leave the area clean and tidy
- Every job guaranteed for a year
- Experience in homes, commercial sites and hotels
- Anti-fungal silicone where joints get wet
Read what affects the cost or customer reviews.
Surface by surface
Plot handovers
Developers can send the plot schedule and specification for a quote. Sealant work across the plot is covered to the agreed spec.
Show homes
Tired or marked sealant in a show home can be renewed. We cut it out and reseal neatly.
Questions from North Wembley
Is North Wembley in your area for new build mastic?
Yes, North Wembley is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Can you help a landlord with a rental near Wembley Central station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
How long does the job take?
Typically it takes anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer, and we’ll tell you how long to expect.
Should I go to my builder first?
Report it to the builder first while you’re covered. If it is not resolved, we can reseal it properly.
Do you work for developers?
Yes. We seal plots to the developer’s programme. Get in touch with the number of plots and the scope and we will quote.
What colour sealant will you use?
It depends on the joint: white or clear for most sanitary joints, colours for worktops, floors and frames. We’ll agree it with you first.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used before we leave.
Is it normal for sealant to crack in a new home?
New homes dry out and move in their first couple of years, and sealant is often rushed onto dusty, unprimed surfaces. Either can make it fail early.