Construction and new-build mastic in New Cross, Greater London
Looking for construction mastic in New Cross? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Bath and shower joints scraped during the final clean
- A mastic package split between trades with no clear owner
- Window and door perimeters that won’t pass inspection
Construction mastic for New Cross sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Our process
Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. Most London premises stay occupied while we’re on site, so we agree zones and timings with the building or facilities manager. Phased work keeps the rest of the building in use.
- First we look at the scope on site or from drawings.
- You receive a fixed quote covering scope, products and sequence.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- Sealing follows the programme as areas are released.
- Problems we find, such as oversized gaps, are raised straight away.
- Final snagging is completed and the 12-month guarantee applies.
What we need from you
- Tell staff and tenants when we will be in
- Point out parking and an unloading spot
- Tell us which areas need to stay in use
Getting a fixed quote
Photos, drawings or a schedule of the joints are often enough for a fixed quote. Where a site visit makes more sense, we will arrange one.
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How we handle construction mastic in New Cross
Getting a subcontractor through site induction should be simple. We’re a Constructionline member and CHAS accredited, and every applicator holds a CSCS card, and we’re fully insured. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. Site teams most often ask us about inconsistent sealant finishes from plot to plot and oversized or tapered gaps around new frames, on window and door perimeters, internal decorators’ caulk and floor and skirting junctions. Searching for sealant specialists in New Cross? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in New Cross must meet its standards or pay the daily charge. Add booked delivery slots and limited storage, and a London mastic package needs planning before the first bead.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Place
- New Cross (SE8, SE14, SE4)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
For managing agents and facilities managers
For main contractors, we work as the sealant subcontractor. Programme, specification and site rules come first, and our applicators hold CSCS cards.
When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
What the job involves on each surface
Bathrooms, en suites and washrooms
Across a block of flats or a hotel, sanitary sealing is repeated in every room. A single team keeps the standard consistent, plot by plot or floor by floor.
External facade and movement joints
External movement joints often need primer, depending on the substrate. Primer goes on where the sealant maker calls for it, and seal only with a dry joint inside the product’s temperature range.
Why deal with it now?
Clearing snags piecemeal is tempting when handover is close. A planned sweep of each plot or floor catches the lot in one go and saves applicators coming back again and again. We can run snagging as its own phase before handover. Getting scaffold, permits or access booked in New Cross takes effort, so while access is arranged it pays to renew all failing joints, not just the worst.
Pricing mastic packages depends on how many there are, their condition and the access, and any specification that applies. Ask us for a fixed quote.
Why choose Mastic Doctor in New Cross
- Fixed quotes based on photos, drawings or a visit
- Specification-led, product-correct work
- One phone line for London, the South East and Scotland
- Fully insured, including public liability cover
Questions about New Cross
Is a hospital such as University Hospital Lewisham somewhere you can work?
Yes, provided the work is planned with the site’s estates team. We follow the site’s permits, sign-in and infection-control procedures in every area.
Can you work at a site such as New Cross Gate Retail Park, by New Cross?
Yes. Our area takes in New Cross and its surroundings, with estates and business parks such as New Cross Gate Retail Park included. Send details of the unit and the work through our quote form for a quick quote.
Can one quote cover more than one building?
Yes. Several buildings can share a single quote, with one point of contact across South East England, Greater London and Scotland.
Are you insured?
Yes. Mastic Doctor is fully insured, public liability included.
What’s the quickest route to a quote?
You can use the quote form on this site; alternatively, call 01277 525 020 or send details through our quote form. Include photographs or drawings if you have them.
Can you fit around our programme?
The programme sets the job. Share the release dates and we’ll match our work to them.
Do you work in New Cross?
Yes. We take on work across New Cross, and the same phone number covers every area.
Facades, frames and programmes in New Cross
As part of Greater London, New Cross is inside the ULEZ, which applies to every van on site. Delivery slots and scarce storage shape how and when the mastic goes in. A good number of hotels sit less than 2 miles from New Cross. When hotels extend or refit, the work is typically squeezed between peak periods, mastic included.
University estates such as University of Greenwich - Greenwich Campus (1.4 miles north-east of New Cross) tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal. On a healthcare site such as University Hospital Lewisham, 1.4 miles to the south-east of New Cross, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully. Hotels like Peckham Rooms Hotel, 1.3 miles west of New Cross, rarely close for long, so refurbishment mastic is phased floor by floor.
New Cross is about 3 miles south-east of London, in Greater London. Businesses, contractors and managing agents in New Cross use us for work on mastic packages. We work across 764 places in Greater London, from busy centres to rural villages.
Anyone looking for construction mastic in SE8, SE14 and SE4 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Streets here include Ivy Road, Mona Road and Avon Road. Main routes into New Cross include the A2209 and A2210, useful when we plan access and materials. Just outside New Cross, we also work in St Johns (1 mile east), Telegraph Hill (1 mile south-west), Deptford (1 mile north-east), Nunhead (1 mile south-west) and Lewisham (1 mile south-east). Nearby towns on our patch include London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).
Landmarks near New Cross
In New Cross, that means premises near Wickham Arms, Fordham Park and Addey and Stanhope School. Nearby too are St. Paul's (0.7 miles north-east) and Laban Centre (0.9 miles north-east). There’s a railway station in New Cross itself: New Cross station. Well-known places in the area include Fan Museum (1.2 miles north-east) and Greenwich Castle (1.5 miles east). The countryside around New Cross includes St. James's Park Lake and Tower Hill.
Honest limits
Honesty saves time and money. Fresh joints won’t solve:
- Specifying the product where the designer hasn’t
- Frames fitted out of tolerance
- Defective windows, doors or glazing units (the supplier or installer’s job)
If you’re not sure, just phone 01277 525 020 or use the quote form and we will give you a straight answer.
Surfaces we seal
- Floor and skirting junctions
- Cladding and panel joints
- Brick and block movement joints
- Window and door perimeters
- Internal decorators’ caulk
- Sanitary and kitchen joints
Should maintenance staff do it?
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.
Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.