The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Fire stopping in Gipsy Hill

Work needed on a service penetration in Gipsy Hill? We assess it, carry out the work and guarantee our workmanship for 12 months.

  • Seals disturbed by maintenance and left open
  • Penetration schedules that need working through
  • Openings found when ceilings come down for a refit
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Fire stopping in Gipsy Hill

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Do you need fire stopping in Gipsy Hill?

A common fault is a product that was never fire-rated in the first place: builders’ foam or ordinary silicone used to fill a hole. The opening looks sealed but has no fire test evidence behind it and has to be removed.

It’s worth sending us details if you spot any of the following:

  • Seals disturbed by maintenance and left open
  • Fire stopping installed outside its tested range
  • Service penetrations left open after M&E works
  • Fire sealant pulled out of the opening

In a retail centre such as Bell Green Retail Park (2.3 miles east of Gipsy Hill), any fire-resisting wall between units that is crossed by new services needs sealing to the tested detail.

What your quote should include

  • Their pre-qualification and accreditations
  • Whether their applicators hold CSCS cards
  • How the joint faces will be prepared and primed
  • Will RAMS and insurance details be available?

How to choose a sealant contractor

Fire stopping for commercial buildings in Gipsy Hill

Facilities managers in Gipsy Hill often find open service penetrations when ceilings come down for other work. If a specification already covers those walls and floors, we can reseal to it. With no specification in place, the first step sits with your designer or fire engineer, not with us. If you are dealing with old intumescent sealant that has split away and non-fire-rated filler around services, we can put it right, whatever the surface. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Gipsy Hill, that means joint design, primers and backing rod as standard.

London has many occupied offices, blocks and mixed-use buildings where services are added and rerouted all the time. Where the specification names fire-rated sealant, it goes in exactly as the manufacturer’s test evidence shows for that wall or floor.

Our workmanship is guaranteed for 12 months, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.

Where
Gipsy Hill (SE19, SE27, SE21)
Wider area
Greater London
Guarantee
12 months on every job
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

When something else is needed

A few problems need another trade or a different fix, and we say so rather than covering them up:

  • Plastic pipes whose detail calls for a collar or wrap
  • Signing off or certifying a building’s fire stopping
  • Designing or specifying fire stopping, which sits with the designer or fire engineer

If in doubt, speak to us on 01277 525 020 or use the quote form and we will say what we think before you book.

What we seal

  • Service gaps in risers
  • Linear gaps at wall heads
  • Cable penetrations
  • Small duct penetrations where the tested detail allows
  • Pipe penetrations
  • Joints between fire-resisting walls and floors

What the job involves on each surface

Cables and cable bundles

Single cables and small bundles are often within a fire-rated sealant’s tested detail. The detail limits bundle size and the gaps between and around cables and we work within those limits.

Drylining partitions

Drylined fire walls are tested in a particular build-up. We check that the product’s detail covers that partition type and board thickness before sealing.

Why deal with it now?

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. Getting scaffold, permits or access booked in Gipsy Hill takes effort, so it makes sense to deal with every failing joint while access is in place.

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 will have a fixed figure to work with.

Why clients in Gipsy Hill choose us

  • Work to your specification and the manufacturer’s guidance
  • CHAS accredited
  • Fully insured, including public liability cover
  • Joints cleaned back to sound surfaces

Take a look at our cost guide and how we’re accredited.

From enquiry to sign-off

Site rules come first: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. All of Greater London is in the ULEZ, and kerbside space in Gipsy Hill can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.

  1. We ask for the product and detail your designer has specified.
  2. Openings are measured and grouped by detail.
  3. Improvised fillers and failed sealant are removed.
  4. Where the detail needs backing, it goes in at the stated depth.
  5. We gun the sealant in to the specified depth around each service and tool it.
  6. Completed areas are checked with you, with the records agreed when we quoted.

Preparing the site

  • Agree which areas must stay open
  • Clear stock, furniture or equipment away from the joints
  • Send any specification or drawings in advance

Ask for a quote

Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.

Ask for a quote

Related advice

Site staff or a sealant specialist?

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Redoing a failed joint typically costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Your questions answered

Can you seal penetrations in a hotel in Gipsy 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 will tell you if the detail calls for a collar, wrap or batt instead.

What happens to BS 476 references for fire stopping in Gipsy Hill?

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

Do you have public liability insurance?

Yes. Mastic Doctor is fully insured, public liability included.

Can one quote cover more than one building?

Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.

Does the weather affect the work?

For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.

What do you charge?

That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote.

Do you work in Gipsy Hill?

Yes. Gipsy Hill is in our area and the rest of Greater London, within our coverage of Greater London, South East England and Scotland. To discuss a job, call the office on 01277 525 020 or email a schedule or drawings.

Where services cross fire walls in Gipsy Hill

With tenants changing and fit-outs following, London buildings see service routes altered again and again. Penetrations are sealed with the specified product, to its tested detail, under the building’s own permit rules. Approved Document B is the English guidance that covers fire stopping around 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. Our part stays the same: the specified product, installed to its tested detail.

Industrial units on estates such as Hamilton Road Industrial Estate (less than half a mile north-west of Gipsy Hill) often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal. Wherever services are added at a hospital such as British Home & Hospital for Incurables (to the west of Gipsy Hill) the compartment line has to be made good with the specified product.

Gipsy Hill is about 3 miles south-east of Stockwell, in Greater London. Anywhere in SE19, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Gipsy Hill is one of 764 places we cover in Greater London.

We take on service penetrations across the SE19, SE27 and SE21 postcode area. Among the streets we cover are Dover Road, Gipsy Road and Berry Lane. Just outside Gipsy Hill, we also work in Upper Norwood (1 mile south-west), Norwood New Town (1 mile south-west), West Norwood (1 mile north-west), Crystal Palace (1 mile east) and West Dulwich (1 mile north). Further afield, our area takes in London (5 miles north), City of Westminster (7 miles north-west), Marylebone (7 miles north), Kensington (7 miles north-west), St Pancras (7 miles north) and Shoreditch (7 miles north).

Around Gipsy Hill

Around Gipsy Hill, our work takes us to commercial buildings near Gipsy Hill Tavern, Hillcrest and Virgo Fidelis Convent Senior School. Gipsy Hill has its own railway station: Gipsy Hill station. Nearby you will also find Whitgift Centre (3.3 miles south) and St Christopher's Hospice (1.2 miles east). For a walk, there’s Knight's Hill and Dulwich Upper Wood.

Map of Gipsy Hill © OpenStreetMap contributors
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