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

Fire stopping in Catslip

We carry out fire-rated and intumescent sealing of service penetrations and linear gaps in Catslip and the surrounding area. Send details for a fixed quote.

  • Old intumescent sealant that has split away
  • Openings left by services added after handover
  • Hidden openings found during inspections
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS accredited
£5m public liability

Fire stopping for businesses in Catslip

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Building owners, agents and FMs in Catslip

Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

If you look after buildings for someone else, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end.

Fire stopping in Catslip

A fire-rated sealant is only one part of a tested system: the evidence covers a specific product, wall or floor type, service, gap, depth 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, cable penetrations and linear gaps at wall heads, and the usual reasons a site gets in touch are head-of-wall gaps with no fire seal and improvised or mixed-product fire seals. For commercial sealant work in Catslip, you deal with one contact from quote to sign-off, whether it’s one building or several.

Around smaller places like Catslip, penetration seals come up in schools, halls, pubs with rooms, care homes and farm buildings used as offices. Any service penetration through those walls should be closed with the specified product, set out as its test evidence shows.

A 12-month guarantee applies to all our work. If an installation problem shows up, call the office on 01277 525 020 or email the details over and we’ll arrange a return visit.

Location
Catslip (RG9)
Wider area
Oxfordshire
Guarantee
A 12-month guarantee
Price
Fixed quote, scope in writing
Call
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Our process

We follow your site rules from the start: signing in, inductions and any permit to work. Once we’re cleared to begin, we take the joints in the sequence agreed with you. Rural sites near Catslip may need directions, gate codes or a contact on site. Add it to your enquiry and we’ll build it into the plan.

  1. The specification and schedule come first, so we know which details apply.
  2. Access, permits and the order of areas are agreed with the site team.
  3. Each opening is checked for wall or floor type, service, gap and depth.
  4. Foam, ordinary sealant and debris come out.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. We tell you about openings that need a different product.

What we need from you

  • Share your working hours and any access restrictions
  • Point out parking and an unloading spot
  • For older buildings, check the asbestos register before work

Get a fixed quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to call the office on 01277 525 020 or send photos by email with what you know.

Ask for a quote

Advice

How the job changes by surface

Cables and cable bundles

New data and power cables are the most common breach we see. Openings around new cables are resealed to the detail.

Metal pipes

Heat travels along metal pipework, and the tested detail may ask for insulation beyond the wall. We follow whatever the detail requires and flag anything we can’t match.

What happens if it’s left?

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. Converted and older buildings near places like Catslip tend to move, and aged sealant cracks. A sealant with the right movement capability, correctly sized, lasts far better.

Pricing service penetrations depends on quantities, condition and access. Call for a quote.

Why clients in Catslip choose us

  • Joints cleaned back to sound surfaces
  • A Constructionline member, so easy to vet
  • Products installed to the manufacturer’s instructions
  • Fixed quotes based on photos, drawings or a visit

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

Questions about Catslip

How does the move away from BS 476 affect penetration seals in Catslip?

References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

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

Yes. We cover Catslip and the area around it, including industrial estates, business parks and retail parks such as Vanalloys Business Park. Send details of the unit and the work through our quote form for a quick quote.

How long do sealant joints last?

Nobody can honestly give a figure in years, 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.

Will you just go over the old sealant?

No. Sealing over old material is one of the classic causes of early joint failure, so it all comes out first.

Can you work while the building is occupied?

Usually, yes. We phase the work so most of the building stays in use, with each area protected and signed.

Do you offer coloured sealant?

In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We’ll confirm the colours available for the specified product.

Will your applicators have CSCS cards?

Yes. Our applicators hold CSCS cards, as many construction sites ask for.

Fire-rated sealing for Catslip buildings

Approved Document B is the English guidance that covers fire stopping around openings and penetrations. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Either way, we install the specified product to its tested detail. Catslip lies roughly 38 miles out from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls; the gaps need the specified seal.

Hotels such as The White Hart Hotel, 0.5 miles west of Catslip, rely on fire-resisting walls between bedrooms and corridors, and refits that add services leave penetrations to seal where fire-rated sealant is specified. Halls and meeting rooms at places like Church of St Bartholomew sometimes gain new services, and any compartment wall crossed needs the specified seal. For a school such as Nettlebed Community School, penetration sealing fits best at the end of the summer works.

Catslip is about 7 miles north of Caversham, in Oxfordshire. We cover Catslip and the rest of Oxfordshire, with the same fixed quotes and 12-month guarantee as everywhere else. We work across 423 places in Oxfordshire, large and small. There’s a separate page for Reading, roughly 9 miles from Catslip.

Postcode districts covered here: RG9 for service penetrations. Just outside Catslip, we also work in Nettlebed (1 mile north-west), Highmoor (1 mile south-west), Highmoor Cross (1 mile south), Bix (2 miles south-east) and Middle Assendon (2 miles east). Further afield, our area takes in Didcot (12 miles west), Abingdon-on-Thames (15 miles north-west), Thame (12 miles north), Henley-on-Thames (4 miles south-east), Benson (6 miles north-west) and Chinnor (9 miles north).

What’s near Catslip

Locally, jobs take us to sites close to The Sun Inn Public House. The nearest railway station is Henley-On-Thames station, about 4.4 miles south-east of the centre. The countryside around Catslip includes Warburg Nature Reserve.

Map of Catslip © OpenStreetMap contributors

What sealant work can’t fix

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:

  • Gaps in walls that were never built as compartment walls
  • Approving the work on behalf of building control
  • Designing or specifying fire stopping, which sits with the designer or fire engineer

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

Surfaces we seal

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

How the quote is worked out

The price varies from site to site. It mainly depends on:

  • How much there is to seal
  • Working within restricted access windows
  • How much existing material needs removing
  • Location, for remote and island sites

The specified product makes a difference, and so does the preparation. Access, phasing and site rules also count.

Sending details for a quote

Diagnosis starts before we arrive. Tell us:

  • The asbestos register, for older buildings
  • Where the site is, with the postcode
  • Access details, including height
  • When you need the work done

Send us photos, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

Accreditations

Trusted. Accredited. Insured.