Greater London · England
Oval New Build Mastic
Our applicators work in Oval on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Sealant applied over dusty or wet surfaces
- Internal frame sealant that has split
- Cracked caulk along new skirting
How we handle new build mastic in Oval
We carry out plot mastic and second-fix sealing for builders, and snagging reseals for new-home owners. In both, preparation makes the difference since hurried prep is behind a lot of new-build failures. We work on kitchens, plot handovers and windows & doors, and people most often call us about internal frame sealant that has split and skirting joints opening in the first winter.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Every joint between floor, skirting and threshold has to cope with some movement.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Oval (SW8, SW9, SW1P)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
It often makes sense to do all the sealant items on a snagging list together. It’s one visit, one quote and one set of cure times. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Oval, the repair is bigger than a sealant job.
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.
What you get with us
- An ARBOMaster approved applicator
- More than 20 years in sealant work
- We never seal over old sealant
- Every job guaranteed for a year
How we quote for new build mastic
You will get a clear quote before any work starts. It’s based on:
- Which sealant suits the joint
- Whether the work is at height
- The number and length of the joints
- The number of rooms or windows
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and agree the price before starting.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- Where the job is, and your postcode
- Whether it has been sealed before
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.
Towns and villages near Oval
What else we do in Oval
How to look after the new joints
A little care helps the new joints last. Our advice:
- Do not wait for the house to settle if water is getting through
- Follow the cure time we give you
- Check bath and shower seals every few months as the house settles
- Photograph failed sealant before it’s redone
Keep the bathroom ventilated, especially in the first year. Run the fan or open a window after bathing so moisture does not sit on the sealant.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left in a busy bathroom.
When to call us in Oval
Baths and trays settle under load once the home is lived in. A bath sealed empty drops slightly when filled, straining the joint and can tear.
Most people get in touch when they notice something like this:
- Gaps between new skirting and floors
- Sealant work across a run of new homes
- Internal frame sealant that has split
- Cracks appearing as a new home settles
As a London address, Oval can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Comparing quotes
- What preparation is included
- How long the guarantee is
- Who turns up on the day
- Which colour the sealant will be
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the number of plots, and we tell you how long to leave it before we go. In a London area like Oval, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
How to prepare
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Ask for a quote
To get a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
New build mastic in Oval: local notes
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. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
If you’ve bought a new home near Vauxhall station, the sealant around baths, showers and frames is worth checking in the first year or two.
Oval is about 1 mile north of Stockwell, in Greater London. Anywhere in SW8, our applicators can take on new build mastic. We cover 764 towns and villages across Greater London, large and small.
Our applicators cover all of SW8, SW9 and SW1P for new build mastic and the streets around it. New build mastic is available to properties on Lett Road, Rita Road and Wyvil Road and the roads around them. With the A203 and A3204 close by, Oval is simple for us to get to. If you’re just outside Oval, we cover Kennington (1 mile north), South Lambeth (1 mile south-west), Little Portugal (1 mile south), North Brixton (1 mile south-east) and Vauxhall (1 mile north). Further out, we also cover City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (4 miles west), St Pancras (3 miles north), Shoreditch (4 miles north-east) and Walthamstow (8 miles north-east).
Local landmarks in Oval
Typical jobs here are in homes near Vauxhall Park, Lambeth Palace Library and St Peter's School. Nearby too are Archbishop Tenison's Church of England School (under half a mile north-east) and Crown and Thistle pub (within half a mile south-west). Oval has its own railway station: Vauxhall station. A little further out are Type Museum (0.5 miles south) and The Gordon Hospital (1 mile north-west). The countryside around Oval includes Bellenden Road Nature Garden and Ludgate Hill.
Your questions about new build mastic in Oval
Can you help a landlord with a rental near Vauxhall station?
Yes. We work for letting agents and landlords as well as homeowners. You can phone 0345 464 0079 or email us with the details for a clear quote.
Can you do new build mastic in Oval?
Yes, Oval is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
What information do you need?
Only a few details: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or email us.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
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 any work starts.
How much does new build mastic cost in Oval?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Landlords, agents and businesses in Oval
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
We also work for property managers and facilities teams in Oval and across Greater London. Several sites can be quoted together, and we’re fully insured for the work.