Greater London · England
New-build mastic & snagging in Streatham Park, Greater London
New build mastic across Streatham Park and nearby, with old sealant always removed completely and a one-year guarantee.
- Joints pulling apart as timber shrinks
- Sealant that never bonded to the surface
- Gaps between new skirting and floors
About our new build mastic in Streatham Park
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. We work on plot handovers, skirting & floors and windows & doors, and common reasons people get in touch are new-build shower sealant that has already split and second-fix sealing on new plots.
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.
We stand behind the work with a one-year guarantee.
- Place
- Streatham Park (SW16, SW17, SW12)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
New homes and floors in Streatham Park
Rainfall in the South East is lower than in much 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 Streatham station, it’s worth checking the sealant early, while snags are still fresh.
Streatham Park is about 1 mile west of Streatham, in Greater London. Wherever you are in the SW16 postcode area, we can carry out new build mastic at your property. Streatham Park is one of 764 towns and villages in Greater London where we work for new build mastic.
We cover every part of SW16, SW17 and SW12 for new build mastic. New build mastic is available to properties on Lewin Road, Rydal Road and Natal Road and the roads around them. If you are just outside Streatham Park, we cover Furzedown (1 mile south-west), Streatham (1 mile east), Tooting (1 mile west), Tooting Bec (1 mile west) and Hyde farm estate (1 mile north). We also work in nearby towns such as London (5 miles north), City of Westminster (6 miles north), Marylebone (6 miles north), Kensington (6 miles north-west), St Pancras (7 miles north) and Shoreditch (7 miles north).
Near you in Streatham Park
Around Streatham Park, our work takes us to homes and buildings near Furzedown Secondary School, Streatham Common and Graveney School. For rail, the closest station is Streatham station, roughly 0.5 miles east of the centre. Nearby you’ll also find London Sewing Machine Museum (0.9 miles north-west) and Southside Wandsworth (2.9 miles north-west). Green spaces nearby include Battersea Park Lake and Knight's Hill.
What sealant work cannot fix
In fairness, there are a few things sealant will not fix:
- Your warranty claim itself, which is between you and the builder
- Baths and trays that move too much for sealant to cope with
- Leaks from pipes, valves or wastes, which need a plumber
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Plot handovers
- Bathrooms & en suites
- Windows & doors
- Show homes
- Skirting & floors
- Kitchens
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Act quickly if a seal starts to leak
- Wipe joints with warm soapy water
- Watch for new gaps as the house dries out
- Resist patching a failed seal with a tube from the DIY shop
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents as they wear the bead.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small.
When to call us in Streatham Park
Sealant is often one of the last jobs before handover. Joints aren’t always cleaned of dust or primed, and the sealant sits on grit instead of the surface.
Keep an eye out for any of the following:
- Sealant work across a run of new homes
- Frame joints opening as the plaster dries
- Gaps between new skirting and floors
- Cracks appearing as a new home settles
As a London address, Streatham Park can be tricky for parking: let us know about parking bays, permits or a driveway.
What to look for in a quote
- What the quote includes, VAT included or not
- Who does the work, and how experienced they are
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
Questions from Streatham Park
I let a flat near Streatham station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is parking an issue for new build mastic in Streatham Park?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or email us.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Do you guarantee your work?
Yes. Every job comes with a one-year guarantee.
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.
Do you work for developers?
Yes. We take on second-fix sealant work across new plots. We clean and prime joints properly to keep callbacks down.
Are you fully insured?
Yes. We are fully insured.
Nearby places to Streatham Park
More services for Streatham Park
Quotes for new build mastic in Streatham Park
You will get a clear quote before any work starts. It’s based on:
- How much there is to do
- The product the joint needs
- The number of rooms or windows
- Any mould that needs treating
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- The problem you’ve noticed
- Where the job is, and your postcode
- The rough size of the job
- How we’d reach the joints
Every job is quoted individually. Just phone 0345 464 0079 or drop us an email with the details, and photos are welcome.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
If you manage several properties in or around Streatham Park, several properties can go on one quote. Send us the addresses and the work at each.
What happens on the day
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to several days, depending on the number of plots for a typical job. In Streatham Park, 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.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
How to prepare
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, call 0345 464 0079 or send us an email.
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Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.