Greater London · England
New-build mastic & snagging in Temple Fortune, Greater London
Professional new build mastic in and around Temple Fortune, with every bit of old sealant taken out first and a 12-month guarantee.
- Cracked sealant around new window and door frames
- Gaps between new skirting and floors
- Sealant that never bonded to the surface
What we do, step by step
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours in a single home. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. 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.
- We remove the failed sealant and clean the joints.
- 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.
- The finished joints are checked and the cure times given.
How to prepare
- Clear the area around the work
- Keep children and pets away from the work area
- Tell us about any water getting in
Get a quote
Want a quote for new build mastic? Please call 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
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New build mastic in Temple Fortune, done properly
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. If you’re still within the builder’s snagging or warranty period, tell them first. If you have sealant applied over dusty or wet surfaces and untidy sealant flagged on a snagging list, we can help.
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.
Our work is backed for twelve months.
- Location
- Temple Fortune (NW11, NW4, N3)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
New build mastic around Temple Fortune
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. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
As a London address, Temple Fortune can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Temple Fortune is about 1 mile south-west of Finchley, in Greater London. Temple Fortune gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Temple Fortune is one of 764 places in Greater London we cover. For nearby work, see our London page (7 miles or so).
All of NW11, NW4 and N3 is covered for new build mastic, from the main roads to the quietest streets. That includes homes and businesses on Hoop Lane, Bridge Lane and Limes Avenue. With the A598 close by, Temple Fortune is simple for us to get to. Close by, we work in Golders Green (1 mile south), Hampstead Garden Suburb (1 mile east), East Finchley (1 mile north-east), North End (1 mile south-east) and Childs Hill (1 mile south). Within a short drive, we also cover London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (6 miles south), St Pancras (5 miles south-east) and Shoreditch (6 miles south-east).
Local landmarks in Temple Fortune
Around Temple Fortune, our work takes us to homes and buildings near The Henrietta Barnett School, The King Alfred School and Princes Park. The nearest railway station is Brent Cross West station, about 1.5 miles south-west of the centre. A little further out are Highgate Private Hospital (1.9 miles east) and Jewish Museum - Finchley (1 mile north-east). Not far away are Darland's Lake and Parliament Hill.
Surface by surface
Plot handovers
Plot mastic is carried out to the developer’s schedule. Each joint is cleaned and primed where needed to keep callbacks down.
Show homes
We can refresh show-home sealant that has discoloured or been knocked. We cut it out and reseal neatly.
Towns and villages near Temple Fortune
More services for Temple Fortune
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Common questions in Temple Fortune
I let a flat near Brent Cross West station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Is Temple Fortune in your area for new build mastic?
Yes, Temple Fortune is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
My new home is still under warranty. Should I contact you?
While the snagging or warranty period runs, the builder should be your first contact. If they’re slow or the fix doesn’t last, we can help.
Can new sealant go on top of the old bead?
No. Sealing over old sealant looks fine for a few weeks, then lifts. All the old sealant comes out before work begins.
Are you insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that usually means someone at home.
Is the work guaranteed?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we will sort it.
Signs you need new build mastic in Temple Fortune
Sealant applied onto damp surfaces does not bond well. On a busy site, joints are not always given time to dry before the sealant goes on.
Common reasons people contact us include:
- Frame joints opening as the plaster dries
- Beads laid onto grit and dust from the build
- Skirting joints opening in the first winter
- Worktop and upstand sealant coming away
For new homes near Brent Cross West station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before you book
- What preparation is included
- What insurance they hold
- Whether VAT is included
- How long to leave it before use
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
How we quote for new build mastic
You will get a clear quote before work begins. It’s based on:
- How many rooms, windows or areas are involved
- How much there is to do
- Which sealant suits the joint
- Whether there’s mould to deal with
No two jobs are quite the same, so each one gets its own quote. 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.
Helping us quote
Before you ask for a quote, have a think about:
- Whether it has been sealed before
- Photos by email, if that’s easy
- What’s wrong with the joints now
- Roughly how big the job is
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Photograph failed sealant before it’s redone
- Avoid scourers and strong chemicals on sealant
- Avoid running a DIY bead over the old one
- Use the extractor fan every time you shower
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry and can be resealed later.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left.