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

Fire Stopping in Checkendon

Fire-rated and intumescent sealing of service penetrations and linear gaps in Checkendon. CHAS accredited and fully insured, with a 12-month guarantee.

  • Unsealed penetrations discovered above suspended ceilings
  • Builders’ foam or ordinary silicone in compartment walls
  • Seals that don’t match their tested detail
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Need fire stopping in Checkendon?

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

About our fire stopping in Checkendon

A fire-rated sealant is only one part of a tested system: its test evidence covers one product in one kind of wall or floor, with set services, gaps, depths and backing. We match each opening to that detail before any sealant goes in, and we say so if it doesn’t fit. We work on joints between fire-resisting walls and floors, pipe penetrations and service gaps in risers, and the usual reasons a site gets in touch are fire sealant pulled out of the opening and openings left by services added after handover. Facilities teams, main contractors and managing agents in Checkendon tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Rural conversions around Checkendon can put new fire-resisting partitions inside older structures. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.

We stand by our work: 12 months, guaranteed. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Checkendon (RG8)
Region
Oxfordshire
Cover
12 months on our workmanship
Quote
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026

From enquiry to sign-off

Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. For a building around Checkendon, tell us how to find it and who will meet us. Add it to your enquiry and we will build it into the plan.

  1. First we confirm the product and tested details named in the specification.
  2. We sort the openings by the detail each one needs.
  3. Old or wrong materials are cut out.
  4. Mineral wool or other backing is fitted where required.
  5. Fire-rated or intumescent sealant goes in around the services and is tooled off.
  6. Completed areas are checked with you, with the records agreed when we quoted.

Getting the site ready

  • Tell us which areas need to stay in use
  • Share the asbestos register for older buildings
  • Arrange parking or a loading space

Get a fixed quote

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we’ll arrange a site visit if anything is unclear.

Get a price

Advice

When it isn’t the sealant

Part of a good diagnosis is knowing where sealant stops. You’ll hear from us if the cause turns out to be any of the following:

  • Openings that need collars, wraps, batts or boards rather than sealant
  • Writing the fire-stopping specification
  • Approving the work on behalf of building control

If in doubt, phone 01277 525 020 or email us and we’ll say what we think before you book.

What we seal

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

Looking after the joints

A few simple habits keep the new joints working:

  • Record which product was used where
  • Brief every trade that openings they make must be sealed
  • Don’t let anyone top up a fire seal with the wrong product
  • Get seals inspected before ceilings and boxing close

Store the specified product details somewhere the next contractor can find them. Anyone resealing later needs to know which product and detail were used.

Specify fire stopping early on refits, not as an afterthought. Details can then be picked to suit the actual pipes, cables and ducts.

Cost factors for service penetrations

Each job is priced on its own details. The things that drive the figure:

  • The site’s rules and procedures
  • The product specified
  • Phasing around occupants
  • Access and working height

Pricing service penetrations depends on quantities, condition and access, and any specification that applies. Call for a quote.

What we need to price the job

Diagnosis starts before we arrive. Let us know:

  • Approximate linear metres or a joint schedule
  • The type of building and who uses it
  • Anything awkward about access or site hours
  • The asbestos register, for older buildings

The quickest route to a quote is a few photographs and the site postcode. Send them through the quote form, or ring 01277 525 020 or send details through our quote form to discuss it first.

Questions we’re asked in Checkendon

Is Checkendon off your patch?

No. Small places get the same service as large ones. London and every South East county are within our area. Good photographs up front let us bring everything on the first visit.

Do you cover business parks and estates near Checkendon, such as Vanalloys Business Park?

Yes, sites like Vanalloys Business Park are within our area, along with the rest of Checkendon. A few photographs and the unit address let us price the work.

What happens if old sealant might contain asbestos?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and if asbestos is suspected, work stops until it’s tested. We don’t remove asbestos-containing materials.

What will the job cost?

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

Is colour matching possible?

Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We confirm what’s available for the specified product when we quote.

Is your workmanship covered by a guarantee?

Yes. It runs for twelve months and covers how we prepared and sealed the joints, but not damage, misuse or other trades’ work.

Is the BS 476 change in 2029 relevant to fire stopping?

In England, references to the older BS 476 national classes are being removed from Approved Document B from 2 September 2029, with transitional arrangements set by the Government. The European route, BS EN 13501-2, then applies. Product selection stays with your designer.

When to bring in a specialist

Redoing a failed joint normally costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.

When to call us in Checkendon

Openings in fire-resisting walls typically appear when services are added or changed. A new cable pulled by an electrician, a pipe rerouted by a plumber or a data run drilled through a riser can leave the hole behind. Across several fit-outs, the openings add up.

Any of the following is a good reason to get the joints checked over:

  • Seals that don’t match their tested detail
  • Openings left by services added after handover
  • Open linear gaps along the top of fire-resisting walls
  • Penetration schedules that need working through

Halls and meeting rooms at places like St Peter and St Paul sometimes gain new services, and any compartment wall crossed needs the specified seal.

What your quote should include

  • What site paperwork they can supply
  • Their pre-qualification and accreditations
  • Is the sealant right for the movement and the substrate?
  • Their public liability cover

How to choose a sealant contractor

Service penetrations in Checkendon buildings

Checkendon is about 41 miles from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls. In England, Approved Document B covers fire stopping of openings and penetrations. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. Our part stays the same: the specified product, installed to its tested detail.

In a school such as Checkendon Church of England (A) Primary School, fire-rated sealant goes in around service penetrations where it is specified. Offices at parks like Vanalloys Business Park (to the east of Checkendon) are re-cabled with each new tenant, and compartment walls need sealing afterwards to the tested detail.

Checkendon is about 6 miles north-west of Caversham, in Oxfordshire. Checkendon sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. 423 places across Oxfordshire fall within our area, Checkendon among them. Sites around Reading have their own page, about 7 miles away.

Commercial sites across RG8 are covered. We cover commercial and managed buildings on Uxmore Road, Whitehall Lane and Lovegrove's Lane. If your building is just outside Checkendon, we cover Stoke Row (1 mile east), Hook End (1 mile south), Woodcote (2 miles south-west), Heath End (2 miles north) and Ipsden (2 miles north-west). A short drive away, we cover Didcot (10 miles north-west), Abingdon-on-Thames (14 miles north-west), Thame (14 miles north), Henley-on-Thames (6 miles east), Benson (6 miles north-west) and Chinnor (12 miles north-east).

Near you in Checkendon

Locally, jobs take us to sites close to Langtree School and The Black Horse pub. The nearest railway station is Goring & Streatley station, roughly 4.4 miles south-west of the centre. Green spaces nearby include Hartslock.

Map of Checkendon © OpenStreetMap contributors
Accreditations

Trusted. Accredited. Insured.