Longlands construction mastic
Need construction mastic in Longlands? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Existing joints on a refurb that need cutting out and resealing
- Cracks opening in caulked internal joints
- Oversized or tapered gaps around new frames
Construction mastic across Longlands
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
General trades versus a specialist
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
A short, simple internal joint is often within reach of a maintenance team. 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.
Construction mastic in Longlands, done properly
We work to the specification and the programme. Where the specification names a product, we use it, and if an alternative is proposed, it goes to you for acceptance first. Backing, primer and depth follow what the sealant maker sets out. If you are dealing with different trades sealing to different standards and new external sealant already peeling away, we can help. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Longlands is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in Longlands 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.
Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If our installation lets you down in that time, we return and fix it.
- Location
- Longlands (DA15, DA14, SE9)
- Wider area
- Greater London
- Guarantee
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Why it’s worth doing now in Longlands
A quick bead over a damaged joint can get an area past inspection. Sealant can’t grip a contaminated or existing bead. Damaged joints are removed and resealed from clean faces. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a quote.
What you get with us
- Over 20 years of commercial sealing
- Fully insured
- Work to your specification and the manufacturer’s guidance
- 12 months’ guarantee on every job
See our cost guide and how we’re accredited.
Also near Longlands
More services for Longlands
What affects the price in Longlands
Each job is priced on its own details. The main factors are:
- How much there is to seal
- Site requirements such as inductions and permits
- The product specified
- Access and working height
A quote for mastic packages depends on how many there are, their condition and the access, plus any specification you are working to. Call for a quote.
Before you send an enquiry
Whether it’s one area or a whole building, the same details help:
- The asbestos register, for older buildings
- How the joints are reached, and at what height
- Your programme or deadline
- Specification clauses that apply
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to phone 01277 525 020 or send details through our quote form with what you know.
Longlands: questions and answers
Do you work in London buildings with loading restrictions?
Yes, we plan every London job around the building’s own access rules. The building manager’s rules go straight into our method. The ULEZ covers the whole of Greater London, which we allow for
Will you plan work around the academic year at somewhere like University of Greenwich Avery Hill Campus?
Yes, holiday working periods are the norm on campus jobs. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Are you insured?
Yes. Our insurance certificate can be sent alongside the quote.
Will you quote for a small job?
Small jobs are welcome alongside larger packages. Send details for a fixed quote.
Which sealant will you use?
Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
How long does a job like this take?
It depends on the scope, though a typical visit typically takes a day or two on a small fit-out and several weeks on a large multi-storey package. Larger or phased jobs take longer, and we will give you a timescale with the quote.
How long before the joints can be used?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Our process
Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on 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 are on site, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.
- First we look at the scope on site or from drawings.
- A fixed quote sets out scope, products and phasing.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- Sealing follows the programme as areas are released.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
Before we start on site
- Share the asbestos register for older buildings
- Tell us which areas need to stay in use
- Arrange parking or a loading space
Getting a fixed quote
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, call the office on 01277 525 020 or email the details over.
Advice
Sites and facades in and around Longlands
Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Longlands. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for. Several hotels sit less than 2 miles from Longlands. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.
For contractors on a campus like University of Greenwich Avery Hill Campus, 1.1 miles north of Longlands, facade and perimeter sealing has to fit around students and term dates. When a college such as Bird College, 1 mile east of Longlands, builds or refurbishes, the mastic package usually has to fit around students and staff. When a school such as Longlands Primary School is extended or refurbished, the mastic package is often squeezed into the holidays.
Longlands is about 1 mile west of Sidcup, in Greater London. Any commercial site in Longlands is covered, for single jobs and planned programmes alike. Longlands is one of 764 places we cover in Greater London. For work in that direction, see our London page.
Work on mastic packages is covered throughout DA15, DA14 and SE9, for business premises of every kind. If your site is on Main Road, Alder Road and Sidcup Road or close by, send details and we will quote for mastic packages. With the A211 nearby, Longlands is straightforward for us to reach. We also cover Foxbury (1 mile south), New Eltham (1 mile north-west), Chislehurst (1 mile south-west), Coldharbour (1 mile west) and Blackfen (1 mile north). Bigger towns within reach include London (9 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles west), St Pancras (11 miles north-west) and Shoreditch (10 miles north-west).
What’s near Longlands
In Longlands, that means premises near Waring Park, Chislehurst School for Girls and Ye Olde Black Horse Inn. The nearest railway station is New Eltham station, about 0.8 miles north-west. A little further out are Queen Mary's Hospital (1 mile south-east) and Greenwich Castle (5 miles north-west). The countryside around Longlands includes Summer Hill and The Tarn.
Owners, agents and contractors
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Longlands can form part of a wider programme.
If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.
Keeping the joints sound
Cleaning and maintenance staff play a part too. Share these points with them:
- Ask for joint and product checks before the package is urgent
- Keep finished joints away from paint, plaster and scrapers
- Ask cleaners to use soft cloths around fresh sealant
- Flag uneven or tapered frame gaps early
Tell the builders’ clean team which areas have new sealant. Blades and abrasive pads are the commonest cause of damage at the final clean.
Leaving the mastic snag list to the end squeezes everyone. A planned close-out through each area as it completes keeps the list short.