Selsdon mastic sealing
Need mastic sealing in Selsdon? It’s simple: send details, get a quote, we seal, guaranteed.
- Cracked, hardened mastic round windows on a block
- Estate-wide sealant that is simply worn out
- Failed external movement joints
Mastic sealing in Selsdon
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Mastic sealing for commercial buildings in Selsdon
Managing agents and housing associations normally need paperwork before anyone starts. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are a Constructionline member and CHAS accredited, and we carry public liability insurance. We work on window and door perimeters on blocks, shopfronts below residential blocks and balcony and threshold joints, and the failures we’re asked to look at most are draught complaints from residents or tenants and failed external movement joints. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Selsdon, preparation and product choice get the time they need.
London’s ULEZ covers every borough, and parking and loading rules vary street by street. For a block or estate, it helps to know where we can park and stage materials.
Whoever the client is, the cover is the same: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Where
- Selsdon (CR2, CR0)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
How a job runs
At the end of each section, we remove the tape, clean down and inspect every joint, 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 Selsdon can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- We check the asbestos register for older buildings and look at the joints.
- A fixed quote covers the joints, products and order of work.
- Failed mastic is removed completely.
- Joint faces are cleaned, backed and resealed.
- We finish each building before moving to the next.
Before we start on site
- Have the specification and drawings to hand
- Point out any areas we must not close
- Tell us what induction or permit system the site runs
Request a quote
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To start the process, call the office on 01277 525 020 or email us.
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Doing it in-house
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
Aftercare for building managers
A few simple habits keep the new joints working:
- Ask residents or tenants to report leaks and draughts early
- Check sealant joints during planned building inspections
- Start inspections with the most exposed faces
- Plan resealing building by building rather than complaint by complaint
Encourage occupiers to report water or draughts at frames. A quick report keeps a small repair small.
Failed mastic often goes unnoticed until heavy rain finds it. Resealing when cracking first shows avoids water damage and saves internal repairs.
Planned mastic for Selsdon portfolios
London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We plan around the notices and access you arrange.
For agents with blocks near Sanderstead station (1.7 miles west of Selsdon), a block-wide mastic programme deals with frames, balconies and entrances in one go. Landlords with units on estates such as Capital Business Centre (to the west of Selsdon) can bring frame, door and external mastic across several units into one programme.
Selsdon is about 2 miles south-east of Croydon, in Greater London. Commercial clients in Selsdon use us for work on mastic joints. Selsdon is one of 764 places in Greater London on our list for mastic joints. Sites around London have their own page, roughly 11 miles from Selsdon.
If you need mastic sealing in CR2 and CR0, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. If your site is on York Road, Byron Road and Abbey Road or close by, send details and we will quote for mastic joints. Close to Selsdon, our area also takes in Forestdale (1 mile east), Addington (1 mile north-east), Sanderstead (1 mile south-west), Coombe (1 mile north-west) and Farleigh (2 miles south-east). Nearby towns on our patch include London (11 miles north), City of Westminster (12 miles north), Marylebone (13 miles north), Kensington (12 miles north-west), St Pancras (13 miles north) and Shoreditch (13 miles north).
What’s near Selsdon
Locally, jobs take us to sites close to Royal Russell School, The Sir Julian Huxley pub and The Quest Academy and the streets around them. For rail, the closest station is Sanderstead station, about 1.7 miles west. Well-known places in the area include St George's Walk (2.7 miles north-west) and Croydon Airport Visitor Centre (2.9 miles west). Not far away are Duppas Hill and Bramley Bank.
Also near Selsdon
Other services in Selsdon
Why act early in Selsdon
Leaving failed external joints lets water reach the structure behind. Damp patches, stained plaster and decorating claims can follow and those cost far more to put right. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.
No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
Why clients in Selsdon choose us
- 12 months’ guarantee on every job
- Specification-led, product-correct work
- CHAS accredited contractor
- Our applicators hold CSCS cards
See how commercial sealant jobs are priced or our accreditations.
Signs you need mastic sealing in Selsdon
Sunlight and weather break mastic down over time. It stiffens, stops stretching and cracks, especially on south and west faces.
It’s worth sending us details if you spot any of the following:
- Brittle perimeter mastic across a building
- The same joint failures repeated across a portfolio
- Leaks at window and door perimeters
- Damaged joints in communal entrances and corridors
If you are responsible for a building such as St Francis, frame and door mastic needs the same attention as any other property.
What your quote should include
- Will CSCS-carded applicators be on site?
- Whether primer will be used where the manufacturer specifies it
- What the guarantee covers, and for how long
- Their approach to joint depth and backing
Your questions answered
Will you take on work at estates like Capital Business Centre, close to Selsdon?
Yes. Our area takes in Selsdon and its surroundings, with estates and business parks such as Capital Business Centre included. A few photographs and the unit address let us price the work.
Can you cope with the access rules in a London building?
Yes, most London buildings have access rules of some kind, and we plan around them. Send the building rules and access times with your enquiry. We allow for the ULEZ, which covers every borough
Can weather delay the job?
For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.
What if the old mastic contains asbestos?
We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.
How long do sealant joints last?
There isn’t a single answer, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
How do you choose the sealant?
Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
What paperwork can you provide?
Our credentials include CHAS, Constructionline and public liability insurance. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.
What the job involves on each surface
Communal areas
Low-level communal joints get damaged more than most and tend to fail first.
Planned maintenance
Planned resealing replaces emergency callouts and spreads the work.