Blendon construction mastic
We carry out mastic packages for new-build and refurbishment projects in Blendon. Send details for a fixed quote.
- Snag items on joints that need redoing before handover
- External joints sealed in damp or cold conditions that are now failing
- Frame gaps too wide for sealant alone
Construction mastic for Blendon sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Questions about Blendon
Do you cover business parks and estates near Blendon, such as Old Bexley Business Park?
Yes, sites like Old Bexley Business Park are within our area, along with the rest of Blendon. A few photographs and the unit address let us price the work.
Can you take on a job at a hospital such as Queen Mary's 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.
How do I request a quote?
The quote form is the simplest route, though you can also speak to us on 01277 525 020 or send details through our quote form. Include photographs or drawings if you have them.
What do you charge?
That depends on the job: quantities, access, the product and any phasing. Call for a fixed quote.
Is Blendon in your area?
Yes. We take on work across Blendon.
Do your applicators hold CSCS cards?
We’re CHAS accredited and a Constructionline member, and each applicator is CSCS-carded. We are fully insured for public liability.
How do you deal with asbestos in old sealant?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and if asbestos is suspected, work stops until it’s tested. We don’t remove asbestos-containing materials.
About our construction mastic in Blendon
The programme rarely stands still, so the mastic package has to flex with it. The sequence is set with the site team and updated as plots or floors are handed over and we don’t seal before other trades have finished in an area. That keeps the work right first time and saves rework. We work on sanitary and kitchen joints, floor and skirting junctions and window and door perimeters, and the usual reasons a site gets in touch are new external sealant already peeling away and existing joints on a refurb that need cutting out and resealing. Facilities teams, main contractors and managing agents in Blendon tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
Building sites in London tend to be tight: limited storage, booked deliveries and access shared with other trades. We fit around the programme, sealing each elevation or floor as other trades hand over.
Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.
- Where
- Blendon (DA5, DA15, DA6)
- Wider area
- Greater London
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
After the work
For the best life from the joints:
- Bring the mastic contractor in after the last trades are through
- Protect sealed areas from following trades
- Ask cleaners to use soft cloths around fresh sealant
- Stick to the specified sealant rather than a generic substitute
A new structure shifts as it loses construction moisture. The right product in each joint copes with that. If that happens, let us know.
Leaving the mastic snag list to the end squeezes everyone. Clearing snags area by area spreads the work out and keeps handover on track.
On site: what to expect
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Joint faces are cleaned back to sound, dry surfaces, primer goes on where the manufacturer specifies it, and the sealant is tooled off neatly. For a job in Blendon, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.
- Drawings, the sealant specification and your programme come to us for pricing.
- 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.
- Every joint is prepared, set to depth and sealed with the specified product.
- We close out snagging and hand over with a 12-month guarantee.
Before we start on site
- Explain the parking and delivery arrangements
- Have the specification and drawings to hand
- Flag any permit to work we will need
Request a quote
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.
Read more
Contractors’ notes for Blendon
Site traffic in Blendon falls within London’s ULEZ, like everywhere else in Greater London. Deliveries are booked and storage is tight, so mastic materials come in as needed. A 2-mile radius around Blendon takes in a number of hotels. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades.
When units on a site such as Old Bexley Business Park, 1.3 miles east of Blendon, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. University estates such as University of Greenwich Avery Hill Campus, 1.9 miles west of Blendon, tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal. Projects at colleges like Rose Bruford College (to the south-west of Blendon) tend to run to term dates, so the mastic is planned tightly.
Blendon is about 1 mile south-east of Welling, in Greater London. We cover Blendon and the rest of Greater London, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 764 places across Greater London fall within our area, Blendon among them. There’s a separate page for London, roughly 10 miles from Blendon.
We cover the DA5, DA15 and DA6 postcode districts for mastic packages. If your site is on Penn Lane, Hurst Road and Brook Lane or close by, we can quote for mastic packages. Being close to the A221, Blendon is straightforward for us to reach. Nearby places we also cover include Bexley (1 mile south-east), Crook Log (1 mile north), Welling (1 mile north-west), Upton (1 mile north-east) and Bexleyheath (1 mile north-east) for mastic packages. Bigger towns within reach include London (10 miles west), City of Westminster (13 miles west), Marylebone (13 miles north-west), Kensington (14 miles west), St Pancras (12 miles north-west) and Shoreditch (10 miles north-west).
Near you in Blendon
Recent enquiries here include premises near Danson Park, The Royal Oak Public House and Hurst Primary School. The closest station to Blendon is Albany Park station, roughly 0.8 miles south. A little further out are Metropolitan Police Museum (1.3 miles south-west) and Bexley Hospital (0.8 miles north-east). Not far away are Wansunt Pit and Summer Hill.
Other services in Blendon
General trades versus a specialist
For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
What affects the price in Blendon
The price varies from site to site. It mainly depends on:
- Joint width, depth and condition
- Any access equipment needed
- Which sealant the job calls for
- Phasing around occupants
The specified product makes a difference, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.
What to include in your enquiry
Good information means a firmer quote. Helpful details to send:
- When you need the work done
- A wide shot and a close-up of the area
- Access details, including height
- The asbestos register, for older buildings
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or send details through our quote form.
Why deal with it now?
Getting the mastic contractor involved early pays off. We can check joint widths, flag frames with gaps that won’t seal and confirm products against the specification, which avoids last-minute problems. Leave it late and they turn up on the snag list. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.
Pricing mastic packages depends on how many there are, their condition and the access. Call for a quote.
Why appoint us
- Work to your specification and the manufacturer’s guidance
- One contact handling all your sites
- CHAS accredited contractor
- Constructionline member
Take a look at how commercial sealant jobs are priced and our accreditations.
Different surfaces, different methods
External facade and movement joints
Many facade substrates need a primer before sealing. We prime where the manufacturer specifies, and seal only with a dry joint inside the product’s temperature range.
Kitchens and utility areas
Kitchen joints are sealed after fitting and before final clean. The sealant is a kitchen-grade product and hygienic or food-safe grades wherever food contact is possible.