Construction Mastic in Streatham
Construction mastic in Streatham, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Frame gaps too wide for sealant alone
- Different trades sealing to different standards
- Old sealant on a refurbishment that needs stripping before new work
Need construction mastic in Streatham?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Cost factors for mastic packages
Sealant work doesn’t have a standard rate, since sites vary so much. What we take into account:
- Location, for remote and island sites
- Working within restricted access windows
- Site requirements such as inductions and permits
- Quantities, in metres or numbers
There’s no price list, because the scope varies so much from one building to the next. Call for a quote.
Before you send an enquiry
There’s no need for a formal survey. A few details are enough to get going:
- Specification clauses that apply
- Any dates the work must fit around
- Whether the building will be occupied during the work
- Where the site is, with the postcode
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to ring 01277 525 020 or email us with what you know.
How we handle construction mastic in Streatham
Getting a subcontractor through site induction should be simple. Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. We work on cladding and panel joints, brick and block movement joints and sanitary and kitchen joints, and what we are called in for most is old sealant on a refurbishment that needs stripping before new work and external joints sealed in damp or cold conditions that are now failing. A specialist sealant contractor works differently from a general builder: in Streatham, that means joint design, primers and backing rod as standard.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in Streatham must meet its standards or pay the daily charge. Alongside that, sites usually need booked deliveries and a plan for where materials go.
Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.
- Location
- Streatham (SW16, SW2, CR4, SW12)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
New build and refits around Streatham
The area within 2 miles of Streatham holds a number of hotels. 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, Streatham included, so site vehicles need to meet its standards or pay the daily charge. Add booked deliveries and tight storage, and the mastic package needs planning with the site team.
Hospital estates such as British Home & Hospital for Incurables, 1 mile to the east of Streatham, tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan. Work at a hotel such as Leigham Court Hotel (to the north of Streatham) tends to be programmed around bookings, mastic included. Recladding or extending a unit at a site like Zennor Road Industrial Estate (1.3 miles north-west of Streatham) brings panel joints and frame perimeters into the programme.
Streatham is about 5 miles south of London, in Greater London. Any commercial site in Streatham is covered, for single jobs and planned programmes alike. 764 places across Greater London fall within our area, including Streatham.
Commercial sites across SW16, SW2, CR4 and SW12 are covered for mastic packages. Streets here include Stanthorpe Road, Gleneagle Mews and Madeira Road. Being close to the A205 and A216, Streatham is straightforward for us to reach. We also cover Streatham Park (1 mile west), Furzedown (1 mile west), Streatham Hill (1 mile north), Hyde farm estate (1 mile north) and Grange Mills (1 mile north-west) for mastic packages. A short drive away, we cover London (5 miles north), City of Westminster (6 miles north), Marylebone (6 miles north), Kensington (6 miles north-west), St Pancras (7 miles north) and Shoreditch (7 miles north).
Around Streatham
In Streatham, that means premises near Bishop Thomas Grant Catholic Secondary School, Streatham Common and Waldorf School of South West London and the streets around them. There’s a railway station in Streatham itself: Streatham station. Well-known places in the area include Clockworks Museum (1.1 miles east) and Southside Wandsworth (3.3 miles north-west). For a walk, there’s Knight's Hill and Battersea Park Lake.
Aftercare for building managers
A few simple habits keep the new joints working:
- Put any product change through the designer first
- Brief the final clean team to avoid blades near sealant
- Ask for joint and product checks before the package is urgent
- Protect sealed areas from following trades
Any damage after we have finished should go on the snag list right away. We can return to clear snags before handover.
Oversized gaps are a problem better caught early. Sealant stretched over an oversized gap won’t last, so the installer needs to correct it first. We raise them during our first walk of the area.
Surface by surface
Internal decorators’ caulk
Acrylic caulk fills internal gaps around trims, boards and frames ahead of decorating. It’s for gaps that stay still and get painted, and we use a flexible sealant where there’s movement.
Kitchens and utility areas
Commercial kitchens often need hygienic or food-safe sealants. We follow the specification and seal to a smooth, cleanable finish.
Places near Streatham
What else we do in Streatham
On site: what to expect
When we get to site, we report to your site contact and complete whatever induction the building runs. Floors, finishes and fittings next to the joints are covered before anything is cut or cleaned, with the work itself normally taking whatever the programme allows, since the work follows the trades as areas are released. All of Greater London is in the ULEZ, and kerbside space in Streatham can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- First we take quantities off the drawings and read through the specification.
- A fixed quote sets out the scope, the products and the sequence.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
- Snags are cleared before handover and completed areas carry our 12-month guarantee.
Getting the site ready
- Explain the parking and delivery arrangements
- Clear stock, furniture or equipment away from the joints
- Send any specification or drawings in advance
Getting a fixed quote
For a fixed quote, call the office on 01277 525 020 or send photos by email with the site address and an outline of the work. Our quote form is another easy route.
Advice
Questions we’re asked in Streatham
Will you plan work around the academic year at somewhere like King's College London?
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.
Is Zennor Road Industrial Estate, near Streatham, within your area?
Yes, sites like Zennor Road Industrial Estate are within our area, along with the rest of Streatham. To start, just speak to us on 01277 525 020 or email us with the unit, the joints involved and your access times.
What site paperwork can you supply?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.
Do you take on mastic snagging only?
Yes. We can work through a mastic snag list area by area before handover and damaged joints are redone properly.
Can the building stay open while you work?
In most cases, yes. We phase the work so most of the building stays in use.
Are you CHAS accredited?
Our applicators hold CSCS cards, and we are CHAS accredited and a Constructionline member. Public liability insurance of five million pounds is in place too.
Are you insured?
Yes. Our insurance certificate can be sent alongside the quote.
Commercial clients in Streatham
Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
We work for building owners and managing agents on sealant work across single buildings or whole portfolios. Several sites can go on one quote, so there’s one set of paperwork to deal with.
Why act early in Streatham
It helps to bring the mastic subcontractor in before the package is urgent. Early involvement means gaps, products and access are sorted before the programme bites, which avoids last-minute problems. Called in at the end, the same issues surface during handover. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
A quote for mastic packages depends on quantities, condition and access. Ask us for a fixed quote.
Why clients in Streatham choose us
- Workmanship guaranteed for 12 months
- Colours confirmed for the specified product
- Clear, fixed quotes
- Fully insured, including public liability cover
Read our cost guide and how we’re accredited.