Fire-rated sealing and fire stopping in Mitcham, Greater London
Fire-rated and intumescent sealing of service penetrations and linear gaps across Mitcham, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Old intumescent sealant that has split away
- Seals disturbed by maintenance and left open
- Fire stopping installed outside its tested range
Need fire stopping in Mitcham?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping around Mitcham: what changes locally
Two care or nursing homes sit less than 2 miles from Mitcham. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal. Several hotels sit less than 2 miles from Mitcham. Bedroom-to-corridor walls in hotels are normally fire-resisting, so new cabling or pipework through them has to be sealed to the tested detail.
At a healthcare site like The Wilson Hospital (0.5 miles south-west of Mitcham), new services through compartment walls are a constant, and each needs the specified seal. Residences at universities like Kingston University Roehampton Vale Campus, 5 miles north-west of Mitcham, have compartment walls that must be resealed whenever services change. Shop fits in centres such as Priory Retail Park, 1.6 miles north-west of Mitcham, can bring new services through fire-resisting walls between units, which then need the specified seal.
Mitcham is about 2 miles west of Thornton Heath, in Greater London. We cover Mitcham, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Mitcham is one of 764 places in Greater London on our list. For work in that direction, see our London page.
We cover the CR4, SW16 and SM4 postcode districts for service penetrations. If your site is on Kings Road, Baker Lane and Manor Road or close by, we can quote for service penetrations. Nearby places we also cover include Hackbridge (1 mile north), Eastfields (1 mile north), Colliers Wood (1 mile north-west), Merton Abbey (2 miles north-west) and Furzedown (2 miles north). Bigger towns within reach include London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (9 miles north) and Shoreditch (9 miles north).
What’s near Mitcham
Around Mitcham, our work takes us to commercial buildings near The Archbishop Lanfranc School, St Mark's Church of England Academy and The White Lion of Mortimer pub, among other places. Mitcham’s nearest station is Mitcham Eastfields station, about 0.5 miles north of the centre. A little further out are Wandle Industrial Museum (0.7 miles west) and Centrale Croydon (2.7 miles south-east). The countryside around Mitcham includes Duppas Hill and Cranmer Green.
About our fire stopping in Mitcham
Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4 and the results are classified to BS EN 13501-2. That classification, such as EI 60 or EI 120, belongs to the product in its tested arrangement. Reproducing the tested arrangement on site is the part we take care of. We work on service gaps in risers, linear gaps at wall heads and pipe penetrations, and the usual reasons a site gets in touch are openings left by services added after handover and builders’ foam or ordinary silicone in compartment walls. Most enquiries from Mitcham start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Fit-outs and M&E works in London buildings often leave service penetrations open behind ceilings and in risers. Fire-rated sealant goes in where it’s the specified item; where a collar, wrap or batt is called for instead, we flag it.
Every job we finish is backed by a 12-month workmanship guarantee, in Mitcham as everywhere else we work. If our installation lets you down in that time, we return and fix it.
- Place
- Mitcham (CR4, SW16, SM4)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Updated
- 3 November 2026
Places near Mitcham
What else we do in Mitcham
Our process
Site rules come first: sign-in, induction and whatever permit system the building uses. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact. In Mitcham, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- We ask for the product and detail your designer has specified.
- We sort the openings by the detail each one needs.
- Old or wrong materials are cut out.
- Where the detail needs backing, it goes in at the stated depth.
- Fire-rated or intumescent sealant goes in around the services and is tooled off.
- Completed areas are checked with you, with the records agreed when we quoted.
Preparing the site
- Share the asbestos register for older buildings
- Arrange parking or a loading space
- Share your working hours and any access restrictions
Quotes
The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or ring 01277 525 020 or email the details over if you’d rather talk the job through.
Read more
Aftercare for building managers
To get the most from the new sealant:
- Settle who seals which penetrations at the start of a project
- Foam or ordinary sealant is never a fire-seal repair
- Check with the data sheet before painting over fire sealant
- Have penetrations checked while they can still be seen
Never top up a fire seal with foam, ordinary silicone or filler. Repairs need the same product and detail as the original, or a new specification from the designer.
Keep a register of where seals are and what they are made of. It tells the next contractor exactly what to reinstate, which saves guesswork.
General trades versus a specialist
Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
When it isn’t the sealant
Sealant solves a lot, but not everything, and we are upfront when that’s the case. It won’t fix:
- Approving the work on behalf of building control
- Construction that lacks the fire resistance the seal relies on
- Openings that need collars, wraps, batts or boards rather than sealant
If in doubt, call the office on 01277 525 020 or send details through our quote form and we’ll say what we think before you book.
Surfaces we seal
- Linear gaps at wall heads
- Cable penetrations
- Joints between fire-resisting walls and floors
- Pipe penetrations
- Small duct penetrations where the tested detail allows
- Service gaps in risers
Cost factors for service penetrations
The price varies from site to site. Expect it to depend on:
- The product specified
- Quantities, in metres or numbers
- Any access equipment needed
- Whether old sealant has to be cut out first
The price depends on the quantity of joints, what has to come out first and the access. Call for a fixed quote once you have the details.
Before you send an enquiry
However big the job, these details speed things up:
- What the building is and how it’s used
- Photos of the joints, close up and from further back
- Your programme or deadline
- Anything awkward about access or site hours
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.
Why act early in Mitcham
Leave a penetration open and smoke and fire can cross into the next compartment far earlier than intended. While the openings can be reached, sealing them is normally straightforward. Wait until ceilings close or areas are occupied and the same work becomes harder to reach. Failed sealant in a building in Mitcham can quickly affect neighbours, tenants or the floor below. Putting it right early is less disruptive than dealing with the consequences.
Every site prices differently: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.
Why appoint us
- Failed material removed, not covered up
- CHAS accredited contractor
- Products installed to the manufacturer’s instructions
- Work carried out by CSCS-carded applicators
Read what affects the cost or our accreditations and insurance.
Questions we are asked in Mitcham
Can you seal penetrations in a hotel in Mitcham after a refit?
Yes, to the specification and the product’s tested detail. We match the product to the wall or floor and the services, and say if something other than sealant is needed.
How does the move away from BS 476 affect penetration seals in Mitcham?
From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
Can staff carry on working while you are here?
Typically, yes. Phased work can be planned so areas stay in use.
How long do sealant joints last?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.
Do you hold CHAS accreditation?
Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.
Do you cover Mitcham?
Yes. We cover Mitcham. For a quote, speak to us on 01277 525 020 or use the quote form.
Will you just go over the old sealant?
No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.