Fire-rated sealing and fire stopping in Streatham Hill, Greater London
Fire-rated and intumescent sealing of service penetrations and linear gaps across Streatham Hill, by CSCS-carded applicators. Fully insured and CHAS accredited.
- Damaged fire seals in risers and voids
- Penetration schedules that need working through
- Expanding foam used as fire stopping
Need fire stopping in Streatham Hill?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
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 any cutting starts, and the work normally takes anything from one day to a planned run of visits, depending on the number of seals and the access. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- First we go through the drawings, schedule or specification for the seals and ask about anything unclear.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Unsuitable fillers and loose debris are taken out of each opening.
- We fit the backing the detail asks for, to the stated depth.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- If an opening needs something other than sealant, we tell you instead of improvising.
What we need from you
- Share the asbestos register for older buildings
- Send any specification or drawings in advance
- Warn occupants and staff about the work
Ask for a quote
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Share whatever details you have and we will fill any gaps with a visit.
Related advice
How we handle fire stopping in Streatham Hill
Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4. A rating such as EI 60 only holds when the product is installed as it was tested. Reproducing the tested arrangement on site is the part we take care of. The enquiries we see most involve unsealed openings around new pipes and cables and unsealed penetrations discovered above suspended ceilings, across cable penetrations, service gaps in risers and joints between fire-resisting walls and floors. Facilities teams, main contractors and managing agents in Streatham Hill tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
After a fit-out or new cabling in a London building, risers and ceiling voids are where open service gaps tend to be found. If sealant is the specified product we fit it to its tested detail, and if the detail needs something else, you will hear it from us.
Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.
- Location
- Streatham Hill (SW2, SW16, SW12)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
What we can’t put right
Sealant solves a lot, but not everything, and we’re upfront when that’s the case. It won’t fix:
- Issuing fire ratings or certificates for seals
- Writing the fire-stopping specification
- Openings that need collars, wraps, batts or boards rather than sealant
Not sure which it is? You can give us a call on 01277 525 020 or send details through our quote form and we’ll tell you honestly.
Joints and surfaces we work on
- Cable penetrations
- Joints between fire-resisting walls and floors
- Linear gaps at wall heads
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Pipe penetrations
Why it’s worth doing now in Streatham Hill
It is cheaper to seal service penetrations as each services package finishes than to come back for them later. While the area is still open, every opening is easy to see and reach. 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 service penetrations depends on quantities, condition and access. Ask us for a fixed quote.
Why choose Mastic Doctor in Streatham Hill
- Fully insured, including public liability cover
- Specification-led, product-correct work
- Sealing commercial buildings since 2005
- CHAS accredited
Take a look at how commercial sealant jobs are priced or how we’re accredited.
What we’re called out for in Streatham Hill
Mixing products or improvising a detail breaks the link with the test evidence. An oversized gap, too shallow a bead, missing backing or two makers’ products combined are what we find most often.
Clients usually get in touch after noticing something like this:
- Seals disturbed by maintenance and left open
- Service penetrations left open after M&E works
- Fire stopping installed outside its tested range
- Snag lists that include open service penetrations
Colleges such as St Francis Xavier Sixth Form College (1.4 miles north-west of Streatham Hill) add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product.
What to look for in a quote
- Their public liability cover
- How joint depth will be controlled
- How long is the guarantee, and what does it include?
- Are they CHAS accredited or on Constructionline?
Building owners, agents and FMs in Streatham Hill
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
We work for building owners and managing agents on everything from one building to a spread of sites. Several sites can go on one quote, so there’s one set of paperwork to deal with.
After the work
Once the work is signed off, a little attention goes a long way:
- Treat an open penetration as a priority repair
- Check with the data sheet before painting over fire sealant
- Get seals inspected before ceilings and boxing close
- Record which product was used where
Keep the product data and installation details with the building’s fire safety information. It makes later repairs much easier to match.
Make reporting new openings part of every permit to work in service areas. It costs little and catches breaches early.
Fire stopping in Streatham Hill: the local picture
In England, Approved Document B covers fire stopping of openings and penetrations. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail. Streatham Hill has plenty of hotels close by, all within 2 miles. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal.
Residences at universities like King's College London (2.3 miles north-east of Streatham Hill) have compartment walls that must be resealed whenever services change. Wherever services are added at a hospital such as British Home & Hospital for Incurables, 1.4 miles to the south-east of Streatham Hill, the compartment line has to be made good with the specified product.
Streatham Hill is about 2 miles south of Stockwell, in Greater London. Streatham Hill sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. Streatham Hill is one of 764 places we cover in Greater London for service penetrations.
Work on service penetrations is covered throughout SW2, SW16 and SW12. If your site is on Keymer Road, Romeyn Road and Palace Road or close by, we can quote for service penetrations. Being close to the A205, Streatham Hill is straightforward for us to reach. Sites close to Streatham Hill are covered too, including Tulse Hill (1 mile north-east), Hyde farm estate (1 mile west), Streatham (1 mile south), Grange Mills (1 mile west) and Clapham Park (1 mile north-west). Further afield, our area takes in London (4 miles north), City of Westminster (5 miles north), Marylebone (5 miles north), Kensington (5 miles north-west), St Pancras (6 miles north) and Shoreditch (6 miles north).
What’s near Streatham Hill
Recent enquiries here include premises near City Heights E-ACT Academy, Streatham Common and The Holland Tringham pub, among other places. There’s a railway station in Streatham Hill itself: Streatham Hill station. A little further out are Tooting Bec Hospital (1.4 miles south-west) and Southside Wandsworth (3.2 miles west). Green spaces nearby include Battersea Park Lake and Knight's Hill.
FAQs: Streatham Hill
Can you seal penetrations in a hotel in Streatham Hill after a refit?
Yes, where the specification calls for fire-rated sealant. It goes in to the manufacturer’s tested detail for the wall or floor and the services passing through, and we’ll tell you if the detail calls for a collar, wrap or batt instead.
Is Zennor Road Industrial Estate, near Streatham Hill, within your area?
Yes. We cover Streatham Hill and the area around it, including industrial estates, business parks and retail parks such as Zennor Road Industrial Estate. A few photos and the unit address let us price the work.
When can you be on site?
We’re in the office from 8am until 5pm, Monday to Friday. Let us know your site hours and access windows, and the work will be planned around them.
What about RAMS and site documents?
Each site asks for different documents, so tell us what you need and we will confirm it when we quote.
Can you handle several sites?
Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.
Is your workmanship covered by a guarantee?
Yes, for 12 months. If our installation fails in that time, we return and fix it.
Do you have public liability insurance?
Yes. We are fully insured, including public liability cover.