Greater London · England
New Build Mastic in Petts Wood
Specialist new build mastic for Petts Wood: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Internal frame sealant that has split
- Cracked caulk along new skirting
- New-build shower sealant that has already split
New build mastic for homes and businesses in Petts Wood
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. Both get the same care over preparation. Typical jobs include gaps behind new kitchen upstands and second-fix sealing on new plots, on skirting & floors, bathrooms & en suites and kitchens.
Shops, offices and commercial units across London have hard-wearing floors with movement joints that need resealing as they wear, and new homes need their plot mastic finished properly before handover.
We stand behind the work with a one-year guarantee.
- Place
- Petts Wood (BR5, BR6, BR2)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Petts Wood
Do you cover Petts Wood for new build mastic?
Yes, Petts Wood is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
I let a flat near Petts Wood station. Can you help?
Yes. We work for letting agents and landlords as well as householders. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
How long will you be here?
A typical job takes a few hours for most snagging lists, longer for a run of plots, including preparation and clearing up. Your quote will say how long we expect yours to take.
Can you reseal over the builder’s sealant?
No. Fresh silicone does not stick to the old layer, so sealing over the top fails quickly. The old sealant always comes out first.
Is the work guaranteed?
Yes. There’s a 12-month guarantee on every job, wherever you are.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Why deal with it now?
DIY kits do not solve the main problems with new-build sealant: grit, unprimed surfaces and old layers underneath. Proper removal and preparation are what make it last. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Petts Wood.
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 make a difference.
Why choose Mr Mastic in Petts Wood
- One-year guarantee on every job
- Fully insured
- 4.9 on Google from 180+ five-star reviews
- We leave the area clean and tidy
Take a look at how sealant jobs are priced and customer reviews.
How the job changes by surface
Plot handovers
Plot mastic is carried out to the developer’s schedule. Each joint is cleaned and primed where needed so the sealant lasts.
Kitchens
Worktops in new homes can move slightly as the house dries, which opens gaps along the back. We reseal them with a flexible sealant.
Quotes for new build mastic in Petts Wood
Jobs vary more than people expect. What affects the quote:
- Working hours on commercial sites
- How much there is to do
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- How we’d reach the joints
- Any previous sealing or DIY work
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
Every job is quoted individually. Simply phone 0345 464 0079 or send us an email and describe the job and send photos if you have them.
Nearby places to Petts Wood
Also in Petts Wood
How to look after the new joints
After the cure time, these simple habits help:
- Do not wait for the house to settle if water is getting through
- Avoid scourers and strong chemicals on sealant
- Use the extractor fan every time you shower
- Raise failed sealant with the developer while you are covered
Avoid standing on the rim of the bath or the edge of the tray while the sealant cures. If a bath or tray moves when you stand in it, get it looked at.
Don’t let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you.
How the visit works
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours in a single home from start to finish. 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.
- 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.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
Before we arrive
- Clear items away from the joints we are working on
- Mention if the joints have been sealed before
- Mention any leaks or damp you’ve noticed
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll explain what’s involved.
Read more
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
New build mastic around Petts Wood
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
For new homes near Petts Wood station, it’s worth checking the sealant early, while snags are still fresh. As a London address, Petts Wood can be tricky for parking: let us know about parking bays, permits or a driveway.
Petts Wood is about 1 mile west of Orpington, in Greater London. Our applicators cover new build mastic for householders, landlords and businesses in Petts Wood and nearby, as part of our work across Greater London. Across Greater London, we cover 764 places, Petts Wood among them. London is on our list too, about 11 miles from Petts Wood.
Here we cover the BR5, BR6 and BR2 postcode area for new build mastic. Whether your property is on Tent Peg Lane, Ryecroft Road and Beaumont Road or a nearby road, our applicators can take on the job. Neighbouring places we cover for new build mastic include Crofton (1 mile south), Broom Hill (1 mile south-east), Southborough (1 mile west), Locksbottom (1 mile south-west) and Bromley Common (2 miles west). Further out, we also cover London (11 miles north-west), City of Westminster (13 miles north-west), Marylebone (13 miles north-west), Kensington (14 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north-west).
Around Petts Wood
In Petts Wood, that means homes and buildings near Jubilee Country Park, Bromley High School and Daylight Inn, among other places. There’s a railway station in Petts Wood itself: Petts Wood station. Nearby you’ll also find Bridgeways Day Hospital (1.5 miles west) and Crofton Roman Villa (1.2 miles south-east). Open spaces near Petts Wood include The Warren and Summer Hill.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed 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 be quoted together.