Brockley construction mastic
Planning work on a mastic package in Brockley? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Old sealant on a refurbishment that needs stripping before new work
- Frame gaps too wide for sealant alone
- Frame perimeters left unsealed or poorly sealed
Construction mastic near Brockley
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Construction mastic for commercial buildings in Brockley
Mastic is often where a new building first shows its quality to the client. Untidy or missed joints are among the commonest snag items. Our aim is joints that pass at the first inspection. If you have caulk cracking where joints are moving more than expected and sanitary sealant damaged by following trades, we can put it right, whatever the surface. A single leaking joint is often how a building in Brockley first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
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.
Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.
- Place
- Brockley (SE4, SE23, SE6)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Price
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
What we’re called out for in Brockley
Swapping the specified sealant for a cheaper general-purpose product is a common cause of failure. A general-purpose silicone on a facade or a caulk in a wet area won’t perform like the specified product. We use what’s specified, and any substitute goes to you for acceptance.
Common reasons buildings call us in:
- Mastic snags holding up handover
- Window and door perimeters that won’t pass inspection
- Failed sealant in an existing building being refurbished
- New external sealant already peeling away
When a school such as Beecroft Garden Primary is extended or refurbished, the mastic package is often squeezed into the holidays.
What to look for in a quote
- Their public liability cover
- Can the work be phased to keep areas open?
- How the existing material will be dealt with
- Their approach to joint depth and backing
What sealant work can’t fix
Being straight saves everyone time. Fresh joints won’t solve:
- Oversized gaps that need packing or adjustment by others
- Joints damaged after sign-off by following trades
- Faulty frames rather than failed sealant
Not sure which it is? You can call the office on 01277 525 020 or send details through our quote form and we’ll tell you honestly.
What we seal
- Window and door perimeters
- Brick and block movement joints
- Cladding and panel joints
- Internal decorators’ caulk
- Floor and skirting junctions
- Sanitary and kitchen joints
Why deal with it now?
It helps to bring the mastic subcontractor in before the package is urgent. We can check joint widths, flag frames with gaps that won’t seal and confirm products against the specification. Leave it late and they turn up on the snag list. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Why us?
- Fully insured, including public liability cover
- Products installed to the manufacturer’s instructions
- Over 20 years of commercial sealing
- A Constructionline member, so easy to vet
See our cost guide or our accreditations.
Facades, frames and programmes in Brockley
The area within 2 miles of Brockley holds plenty of hotels. When hotels extend or refit, the work is typically squeezed between peak periods, mastic included. Site traffic in Brockley falls within London’s ULEZ, like everywhere else in Greater London. Delivery slots and scarce storage shape how and when the mastic goes in.
Recladding or extending a unit at a site like Clyde Vale Industrial Estate, 1.5 miles south-west of Brockley, brings panel joints and frame perimeters into the programme. On a healthcare site such as University Hospital Lewisham, 0.7 miles east of Brockley, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.
Brockley is about 1 mile south of New Cross, in Greater London. Looking for construction mastic in Brockley? We can help. Our Greater London coverage takes in 764 places.
We take on mastic packages across the SE4, SE23 and SE6 postcode area, for business premises of every kind. For a building on Ivy Road, Nash Road and Lindal Road or nearby, we can quote for mastic packages. We also cover Crofton Park (1 mile south-east), Honor Oak (1 mile west), Ladywell (1 mile east), Forest Hill (1 mile south-west) and Nunhead (1 mile north-west). Nearby towns on our patch include London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (8 miles north-west), St Pancras (6 miles north-west) and Shoreditch (5 miles north).
Landmarks near Brockley
Recent enquiries here include premises near Blythe Hill Tavern, Allenby Tutorial Trust and Blythe Hill Fields and the streets around them. Brockley has its own railway station: Crofton Park station. Nearby you’ll also find Horniman Museum and Gardens (1.4 miles south-west) and University Hospital Lewisham (0.7 miles east). Not far away are One Tree Hill and Knight's Hill.
Diagnose, treat, sign off
Where the site stays busy, we agree a sequence with your contact so the disruption stays in one area at once. Each area is protected, prepared and sealed, then handed back before the next one starts. Planning a London job such as one in Brockley starts with access. Give us the hours we can be on site and we’ll schedule to suit.
- Drawings, the sealant specification and your programme come to us for pricing.
- We return a fixed quote that ties the mastic package to your programme.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- We seal each plot or floor as it’s released to us.
- 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.
Preparing the site
- Share the asbestos register for older buildings
- Let building users know which areas are affected
- Share your working hours and any access restrictions
Getting a fixed quote
Specifications, drawings and tender packages are welcome with any enquiry, and we will price against exactly what is specified. For smaller jobs, photos and a description will do.
Advice
Brockley: questions and answers
Can you work at a site such as Clyde Vale Industrial Estate, by Brockley?
Yes. We cover Brockley and the area around it, including industrial estates, business parks and retail parks such as Clyde Vale Industrial Estate. Photos and a short description are enough for a first look.
Do you work in London buildings with loading restrictions?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Share the building’s contractor rules and we’ll work to them. The ULEZ covers the whole of Greater London, which we allow for
Can you fit around our working hours?
The office is staffed Monday to Friday, from 8am until 5pm. Tell us your site hours and access windows and the work will be fitted around them.
Do your applicators hold CSCS cards?
Our applicators are CSCS-carded, and we hold CHAS accreditation and Constructionline membership. Tell us what site paperwork you need and we will confirm with the quote.
Do you take on multi-site work?
Yes. Several buildings can share a single quote, and you deal with one contact throughout across South East England, Greater London and Scotland.
Do you do fire-rated sealing on new builds?
Fire-rated sealing at service penetrations and linear gaps can be included where specified. Record requirements are confirmed at quote stage.
Do you offer coloured sealant?
That depends on the product. Some ranges are wide, others limited, so we will confirm the colours available for the specified product with the quote.
Cost factors for mastic packages
To price the job, we consider:
- Distance, for remote addresses
- How much existing material needs removing
- The product specified
- How accessible the joints are
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you’ll have a fixed figure to work with.
Sending details for a quote
It doesn’t need to be a full survey. A few details are enough to get going:
- How the joints are reached, and at what height
- The product your specification calls for
- Drawings or a marked-up plan, if available
- Whether the building will be occupied during the work
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, speak to us on 01277 525 020 or email the details over.
Aftercare for building managers
Your facilities or cleaning team can help the joints last. Share these points with them:
- Keep finished joints away from paint, plaster and scrapers
- Release areas for mastic once other trades have finished in them
- Note which sealant went where at handover
- Share drawings and the specification as soon as possible
Record which products went where in the handover file. Future maintenance is easier when the products are known. Tell us what records you need and we’ll confirm with the quote.
In wet areas, a weak sanitary joint shows up quickly once the building is occupied. Water gets behind trays, vanity tops and panels. Getting the product and preparation right first time avoids that.