Greater London · England
New Build Mastic in Fortis Green
New build mastic for Fortis Green and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Cracked caulk along new skirting
- Joints pulling apart as timber shrinks
- Gaps behind new kitchen upstands
New build mastic for homes and businesses in Fortis Green
Snagging sealant properly means taking the failed bead out completely. New silicone won’t bond to old silicone, so the joint is cut out, cleaned, dried and resealed. If you are dealing with kitchen sealant that has pulled off the wall and leaking shower tray seals in a new home, we can help, whatever the surface.
Much of London’s new housing is flats 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.
The work is covered for a year after we finish. If anything is not right with it, phone 0345 464 0079 or drop us an email.
- Location
- Fortis Green (N10, N2, N6)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Fortis Green
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
How it works
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the number of plots for a typical job. In Fortis Green, 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.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Let us know if you’ve seen damp or leaks
- Try not to wet indoor joints just before the visit
Ask for a quote
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Related advice
Surface by surface
Skirting and floors
As timber and screed dry, skirting and floors shift. Caulk cracks; a flexible sealant moves with it.
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
What affects the quote in Fortis Green
Call for a quick quote. The main things that affect it are:
- Mould in or behind the old joints
- The number and length of the joints
- Whether the work is at height
- The type of sealant required
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before we start.
Helping us quote
You don’t need to know the technical terms. Just tell us:
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
- A few photos by email, if you can
- Whether it’s a home or a business
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
What we’re called out for in Fortis Green
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.
The problems people generally mention when they call are:
- Sealant that never bonded to the surface
- Plot mastic for developers ahead of handover
- Kitchen sealant that has pulled off the wall
- New-build shower sealant that has already split
Fortis Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What to look for in a quote
- Whether VAT is included
- Which sealant they’ll use, and why
- How long to leave it before use
- Whether they seal over old material or remove it
When something else is needed
New sealant can’t fix everything, and we’d rather say so up front. Sealant will not put right:
- Cracking that points to a structural problem
- A tray or bath that is not properly supported, until it’s fixed
- Broken tiles or a split tray
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before booking.
What we seal
- Skirting & floors
- Windows & doors
- Plot handovers
- Kitchens
- Show homes
- Bathrooms & en suites
New build mastic in Fortis Green: local notes
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.
If you’ve bought a new home near Alexandra Palace station, the sealant around baths, showers and frames is worth checking in the first year or two.
Fortis Green is about 1 mile south-east of Finchley, in Greater London. If you need new build mastic in Fortis Green, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Greater London. Across Greater London, we cover 764 places, and Fortis Green is one of them. London is on our list too, around 7 miles away.
All of N10, N2 and N6 is within our area for new build mastic. New build mastic is available to properties on Hill Road, Durham Road and Steeds Road. Fortis Green is on the A504, which makes it straightforward to reach. Nearby, we also carry out new build mastic in Muswell Hill (1 mile east), East Finchley (1 mile west), Highgate (1 mile south), Crouch End (1 mile south-east) and Hampstead Garden Suburb (2 miles south-west). We also work in nearby towns such as London (7 miles south), City of Westminster (5 miles south), Marylebone (5 miles south), Kensington (7 miles south), St Pancras (5 miles south) and Shoreditch (6 miles south-east).
Around Fortis Green
Typical jobs here are in homes near Tollington School, Cherry Tree Wood and The Clissold Arms and the streets around them. For rail, the closest station is Alexandra Palace station, about 1.4 miles east of the centre. A little further out are Kenwood House (1.6 miles south-west) and Grand Arcade (1.8 miles north-west). Green spaces nearby include Highgate Hill and Glebelands Local Nature Reserve.
Nearby places to Fortis Green
What else we do in Fortis Green
Fortis Green: your questions answered
Is parking a problem for a job in Fortis 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.
Can you help a landlord with a rental near Alexandra Palace station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Do you use white or clear sealant?
That depends on what the joint meets: white or clear in most bathrooms, and a colour to suit worktops, frames and floors elsewhere. We agree the colour before we start.
Can you work from my snagging list?
Yes. Send it with photos and we will quote for the sealant items. If something isn’t sealant, we will say so.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
Do you cover Fortis Green?
Yes, we do. Our applicators work in Fortis Green, and the service is the same as everywhere else.
Do you guarantee your work?
Yes. Every job comes with our one-year guarantee.
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.