Greater London · England
Addiscombe New Build Mastic
New build mastic for Addiscombe and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Second-fix sealing on new plots
- Smeared, uneven beads picked up at snagging
- Sealant applied over dusty or wet surfaces
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
New build mastic in Addiscombe
New homes move as they dry out. Timber dries and shrinks, and baths and trays settle, so sealant that was laid quickly before handover often cracks. Typical jobs include gaps between new skirting and floors and sealant work across a run of new homes, on windows & doors, kitchens and plot handovers.
Shops, offices and commercial units across London have hard-wearing floors with movement joints that need resealing as they wear, while new homes need a neat, sound finish around frames, baths and kitchens before handover.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Addiscombe (CR0, SE25, CR9)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Addiscombe
Other services in Addiscombe
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote, and we are fully insured.
Joints and finishes in Addiscombe homes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent.
Addiscombe is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Addiscombe is about 2 miles north-east of Croydon, in Greater London. Every kind of property in Addiscombe can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. Addiscombe is one of 764 towns and villages in Greater London where we work. For nearby work, see our London page.
Postcode districts we cover here for new build mastic: CR0, SE25 and CR9. If you need new build mastic at a property on Grant Road, Capri Road and Coe Avenue or anywhere close by, our applicators can take on the job. Addiscombe is on the A232, which makes it straightforward to reach with everything needed for new build mastic. If you’re just outside Addiscombe, we cover Shirley Oaks (1 mile east), Ashburton (1 mile north), Woodside (1 mile north), Shirley (1 mile east) and Monks Orchard (1 mile east). We also work in nearby towns such as London (8 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
Around Addiscombe
We work in homes and buildings around The Woodside Academy, The Cricketers pub and Ashburton Park, among other places. The closest station to Addiscombe is Norwood Junction station, roughly 1.2 miles north. A little further out are St George's Walk (1.5 miles west) and Crystal Palace Museum (2.7 miles north). Open spaces near Addiscombe include Duppas Hill and Bramley Bank.
Signs you need new build mastic in Addiscombe
New homes are full of moisture from plaster, screed and concrete, and it dries out over the first couple of years. Drying timber shrinks and pulls joints apart, and sealant that can’t keep up splits.
Look out for any of the following:
- Worktop and upstand sealant coming away
- Sealant work across a run of new homes
- Messy sealant that spoils new finishes
- New-build shower sealant that has already split
If you’ve bought a new home near Norwood Junction station, the sealant around baths, showers and frames is worth checking in the first year or two.
Comparing quotes
- What the quote includes, VAT included or not
- What happens if the job turns out different
- Whether the sealant suits the joint
- The length of the guarantee
Questions from Addiscombe
I let a flat near Norwood Junction station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Can you do new build mastic in Addiscombe?
Yes, Addiscombe 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 colour sealant will you use?
We use white, clear or a colour to suit the finishes. Let us know your preference when you ask for a quote.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Can I add another job to the visit?
Yes. Just list everything you need and you’ll get one quote.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Can you reseal over the builder’s sealant?
No. Over-sealing traps mould and water and soon fails. We remove every bit of the old bead before resealing.
Looking after it afterwards
So the new joints stay in good condition:
- Report sealant problems to your builder during the snagging period
- Avoid running a DIY bead over the old one
- Ventilate bathrooms well, especially in the first year
- Clean sealant with mild detergent, not abrasives
Keep pictures of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black keeps the job straightforward.
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Structural cracks in walls or ceilings
- Movement caused by a poorly fitted tray or bath
- Cracked trays, tiles or worktops
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think before you book.
What we seal
- Windows & doors
- Plot handovers
- Show homes
- Kitchens
- Skirting & floors
- Bathrooms & en suites
What happens on the day
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the number of plots, and the area is left clean. In a London area like Addiscombe, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- 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.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
Advice
Leave it or put it right?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we will explain what it covers.
Why Addiscombe customers choose us
- A choice of colours where the product allows
- Every job guaranteed for a year
- ARBOMaster approved applicator
- Sealant colour chosen to suit