Mastic contractors in New Addington
Mastic packages for new-build and refurbishment projects across New Addington, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Frame perimeters left unsealed or poorly sealed
- New external sealant already peeling away
- Different trades sealing to different standards
Construction mastic across New Addington
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
How the job changes by surface
Window and door perimeters
Gaps around frames have to be within the sealant’s range. We check them during the first walk-round and flag any that need packing or adjusting before sealing starts.
Kitchens and utility areas
Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. A kitchen-suitable sealant is used, food-safe where food contact is possible.
How we handle construction mastic in New Addington
Mastic tends to be one of the final packages before handover. Mastic Doctor takes on mastic packages for main contractors and developers, following the trades through the building as rooms and elevations become ready. If you have snag items on joints that need redoing before handover and external joints sealed in damp or cold conditions that are now failing, we can help, on internal decorators’ caulk, sanitary and kitchen joints and cladding and panel joints alike. Searching for sealant specialists in New Addington? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
Every London site, New Addington included, is inside the ULEZ, which applies to deliveries and contractors’ vans alike. Add booked delivery slots and limited storage, and a London mastic package needs planning before the first bead.
Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Location
- New Addington (CR0, CR9)
- Wider area
- Greater London
- Cover
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Keeping the joints sound
Keep the joints in good shape with a few simple steps:
- Bring the mastic contractor in after the last trades are through
- Brief the final clean team to avoid blades near sealant
- Use the product the specification names
- Record the products used in the O&M file
Brief the sparkle clean so they don’t scrape the new joints. Scrapers used on frames and worktops can nick or lift a new bead, so stick to soft cloths and gentle cleaners near sealant.
In wet areas, a weak sanitary joint shows up quickly once the building is occupied. Water gets behind trays, vanity tops and panels, and the repair falls into the defects period. Getting the product and preparation right first time avoids that.
When something else is needed
Some faults sit outside our scope, and we point that out rather than sealing over them:
- Approving fire stopping as compliant
- Specifying the product where the designer hasn’t
- Damage to finishes by other trades after we’ve sealed
Not sure which it is? You can ring 01277 525 020 or send photos by email and we’ll tell you honestly.
Joints and surfaces we work on
- Sanitary and kitchen joints
- Internal decorators’ caulk
- Window and door perimeters
- Brick and block movement joints
- Floor and skirting junctions
- Cladding and panel joints
Diagnose, treat, sign off
At the end of each section, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. If an area should be left alone while the sealant cures, we say how long and put signs out. All of Greater London is in the ULEZ, and kerbside space in New Addington can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We price from the drawings, specification and programme you send.
- A fixed quote sets out the scope, the products and the sequence.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- Areas are sealed plot by plot or floor by floor as the trades hand them over.
- Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
- Before handover, snags are dealt with and the package is signed off under our 12-month guarantee.
Getting the site ready
- Move anything stored against the joints
- Point out parking and an unloading spot
- Send your site hours and access windows
Getting a fixed quote
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. If you have questions first, ring 01277 525 020 or use the quote form.
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Contractors’ notes for New Addington
A number of hotels sit less than 2 miles from New Addington. When hotels extend or refit, the work is typically squeezed between peak periods, mastic included. Site traffic in New Addington falls within London’s ULEZ, like everywhere else in Greater London. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for.
When units on a site such as Vulcan Way Industrial Estate (0.6 miles east of New Addington) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. Historic houses such as Addington Palace, 1.5 miles to the north-west of New Addington, are a reminder of the older buildings in the wider area, where sealing against old stone, brick or timber needs compatible products. Projects at schools like Rowdown Primary School work to term dates, so mastic is programmed tightly.
New Addington is about 4 miles south-east of Croydon, in Greater London. We cover commercial sites throughout New Addington. New Addington is one of 764 places we cover in Greater London. For work in that direction, see our London page, about 11 miles away.
Postcode districts covered here: CR0 and CR9 for mastic packages. Among the streets we cover are Bothwell Road, Windham Avenue and Gascoigne Road. Just outside New Addington, we also work in Forestdale (1 mile west), Fickleshole (1 mile south), Addington (1 mile north-west), Farleigh (1 mile south-west) and Selsdon (2 miles west). A short drive away, we cover London (11 miles north), City of Westminster (13 miles north-west), Marylebone (13 miles north-west), Kensington (14 miles north-west), St Pancras (13 miles north) and Shoreditch (13 miles north).
Around New Addington
Locally, jobs take us to sites close to Meridian High School and Addington Vale. New Addington’s nearest station is Hayes (Kent) station, roughly 2.6 miles north-east of the centre. Other landmarks nearby include Warlingham Park Hospital (1.8 miles south) and Bethlem Museum of the Mind (3.3 miles north-east). Green spaces nearby include Nore Hill and Hutchinson's Bank.
Leave it or put it right?
Sealing over damaged or contaminated new joints might save a day, but it rarely lasts. New sealant laid on old or dirty sealant has nothing to bond to and the defect reappears in the defects period. Damaged joints are removed and resealed from clean faces. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
We don’t publish prices, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.
Why appoint us
- Products installed to the manufacturer’s instructions
- RAL and finish matching where the product range allows
- Our applicators hold CSCS cards
- Fully insured
Places near New Addington
More services for New Addington
New Addington: questions and answers
Can you work around term dates at a campus such as John Ruskin College?
Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Do you take on work at healthcare sites like Bethlem Royal Hospital?
Yes, provided the work is planned with the site’s estates team. Each area is agreed with the ward or department and the estates team in advance.
Can you fit around our programme?
Working to your programme, we seal each area as it’s handed over. The sequence is agreed with the site manager at the start and adjusted as things change.
How do I request a quote?
You can use the quote form on this site; alternatively, speak to us on 01277 525 020 or email the details over. Photos, drawings or a joint schedule help us quote quickly.
Can the building stay open while you work?
Typically, yes. We phase the work so most of the building stays in use, with each area protected and signed.
What hours do you work?
The office is staffed Monday to Friday, from 8am until 5pm. Tell us your site hours and access windows and the work will be fitted around them.
Do you take on small jobs?
Small jobs are welcome alongside larger packages. Photos and a description are enough to start.
What sets the cost
A fixed quote reflects the actual work. It allows for:
- Which sealant the job calls for
- Quantities, in metres or numbers
- Distance, for remote addresses
- Removal of failed or old sealant
A quote for mastic packages depends on quantities, condition and access, plus any specification you’re working to. Call for a quote.
What to include in your enquiry
For an accurate fixed quote, we need a clear picture of the site. Send us:
- Clear photographs of the problem areas
- The asbestos register, for older buildings
- Anything awkward about access or site hours
- When you need the work done
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photos and a few notes.