Mastic contractors in Selsdon
Construction mastic in Selsdon, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Frame gaps too wide for sealant alone
- Window and door perimeters that won’t pass inspection
- Cracks opening in caulked internal joints
Construction mastic in Selsdon
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Construction mastic for commercial buildings in Selsdon
Getting a subcontractor through site induction should be simple. Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member, and we are fully insured. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. We work on floor and skirting junctions, internal decorators’ caulk and cladding and panel joints, and the failures we are asked to look at most are mastic snags holding up handover and cracks opening in caulked internal joints. Facilities teams, main contractors and managing agents in Selsdon tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
Every London site, Selsdon included, is inside the ULEZ, which applies to deliveries and contractors’ vans alike. Alongside that, sites normally need booked deliveries and a plan for where materials go.
We stand by our work with a 12-month guarantee. That covers our preparation and application.
- Location
- Selsdon (CR2, CR0)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Leave it or put it right?
Refurbishments sometimes budget for new windows when the frames are sound and only the seal has failed. Sound frames often need only a new perimeter seal and that’s a far smaller job. We will say so if a frame itself is the problem. Failed sealant in a building in Selsdon can quickly affect neighbours, tenants or the floor below. Putting it right early is less disruptive than dealing with the consequences.
There’s no price list, since every building and every scope is different. For a fixed figure, call for a quote.
Why us?
- Workmanship guaranteed for 12 months
- One phone line for London, the South East and Scotland
- Fully insured
- RAL and finish matching where the product range allows
Read how commercial sealant jobs are priced and how we’re accredited.
How a job runs
Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. For a job in Selsdon, 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.
- We walk the site or review drawings to understand the package.
- A fixed quote sets out scope, products and phasing.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- We seal plot by plot or floor by floor in line with the programme.
- Problems we find, such as oversized gaps, are raised straight away.
- The package is closed out, snags cleared and backed by our 12-month guarantee.
Preparing the site
- Tell us your opening times and when work is allowed
- Tell us which areas need to stay in use
- Arrange parking or a loading space
Ask for a quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. For smaller jobs, photographs and a description will do.
Related advice
Different surfaces, different methods
Bathrooms, en suites and washrooms
Sanitary joints around baths, showers, basins and WCs need anti-mould sanitary silicone. Joints are cleaned, sealed and tooled neatly and baths are loaded where appropriate before sealing.
External facade and movement joints
Many facade substrates need a primer before sealing. We prime where the manufacturer specifies and work only when conditions suit.
Also near Selsdon
More services for Selsdon
For managing agents and facilities managers
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.
When you manage a building on behalf of an owner, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end.
Common questions from Selsdon clients
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Say when the building is occupied and when it’s quiet, and we will plan accordingly.
Can you work around term dates at a campus such as John Ruskin College?
Yes. We plan campus work around teaching, exams and residence turnarounds. Let us know which documents your site asks for, and we will confirm them alongside the quote.
How do I request a quote?
It works in four steps: send details, get a quote, we seal, guaranteed. The first step only needs photos and a postcode.
Will you come and look before quoting?
It depends on the job. Simple work can often be priced from photographs, and bigger or more complex jobs typically get a visit.
What joints do you seal on a new build?
Inside and out: frame perimeters, movement joints, caulk where called for, sanitary and kitchens.
Does weather matter for sealant work?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so damp, frosty or very cold days can stop external work. Inside work is seldom held up.
What happens if the weather stops external sealing?
External mastic depends on conditions: each sealant has a temperature range, and the joint must be dry. We plan external elevations with that in mind.
Site staff or a sealant specialist?
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong usually costs more in the end than doing them right.
What sealant work can’t fix
A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be one of these:
- Designing joint widths or choosing the specification (that sits with the designer)
- Deciding which fire-stopping product a penetration needs
- Rework caused by others damaging completed areas
If you are not sure, just ring 01277 525 020 or email the details over and we’ll give you a straight answer before you book.
Surfaces we seal
- Window and door perimeters
- Internal decorators’ caulk
- Floor and skirting junctions
- Sanitary and kitchen joints
- Brick and block movement joints
- Cladding and panel joints
Contractors’ notes for Selsdon
Selsdon has a number of hotels close by, all within 2 miles. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. The ULEZ covers the whole of Greater London, Selsdon included, so site vehicles need to meet its standards or pay the daily charge. Deliveries are booked and storage is tight, so mastic materials come in as needed.
Extensions at sites like Shirley Oaks Hospital (to the north of Selsdon) normally sit beside working departments, and the mastic follows strict access rules. Hotels like Selsdon Park Hotel, 0.6 miles to the south-west of Selsdon, rarely close for long, so refurbishment mastic is phased floor by floor. Further education sites such as John Ruskin College, 0.6 miles north-east of Selsdon, are extended and refurbished from time to time, with mastic often programmed into the summer break.
Selsdon is about 2 miles south-east of Croydon, in Greater London. We send applicators to Selsdon for mastic packages, handled exactly as we handle every other area. Across Greater London, 764 places are covered, Selsdon among them. Sites around London have their own page, roughly 11 miles from Selsdon.
We cover the CR2 and CR0 postcode districts for mastic packages. Among the streets we cover are York Road, Byron Road and Abbey Road. We also cover 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) for mastic packages. A short drive away, we cover 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).
Local landmarks in Selsdon
Around Selsdon, our work takes us to commercial buildings near Royal Russell School, The Sir Julian Huxley pub and The Quest Academy, among other places. For rail, the closest station is Sanderstead station, roughly 1.7 miles west of the centre. Nearby you’ll also find St George's Walk (2.7 miles north-west) and Croydon Airport Visitor Centre (2.9 miles west). The countryside around Selsdon includes Duppas Hill and Bramley Bank.