Fire-rated sealing and fire stopping in Bow, Oxfordshire
Fire-rated and intumescent sealing of service penetrations and linear gaps across Bow, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Openings left by services added after handover
- Hidden openings found during inspections
- Non-fire-rated filler around services
Fire stopping near Bow
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Fire stopping in Bow, done properly
Most of our fire stopping work happens after the building is up. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls, often unnoticed. Those on your schedule are closed with the specified product. The enquiries we see most involve unsealed joints where partitions meet the slab and fire sealant pulled out of the opening, on cable penetrations, pipe penetrations and joints between fire-resisting walls and floors. A specialist sealant contractor works differently from a general builder: in Bow, that means joint design, primers and backing rod as standard.
Around smaller places like Bow, penetration seals come up in schools, halls, pubs with rooms, care homes and farm buildings used as offices. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.
The 12-month guarantee covers our workmanship: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Location
- Bow (SN7)
- Region
- Oxfordshire
- Cover
- 12 months on our workmanship
- Quotes
- Quoted before any work starts
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Leave it or put it right?
Open service penetrations matter on ordinary days, not just in a fire: smoke, noise and draughts pass through them every day. The specified fire seal closes the gap for all of these. Around Bow, it’s better to renew all the failing joints at once. Send photographs of each area and we’ll quote for the lot.
We don’t publish prices, because the scope varies so much from one building to the next. For a fixed figure, call for a quote and we’ll price your job on its own details.
Why choose Mastic Doctor in Bow
- Over 20 years of commercial sealing
- Products installed to the manufacturer’s instructions
- One contact handling all your sites
- Fully insured, including public liability cover
Take a look at how commercial sealant jobs are priced or our accreditations.
How a job runs
A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work typically takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence, and we clear our waste as we work. For a building around Bow, tell us how to find it and who will meet us. Send that with the details and we will confirm the plan with the quote.
- 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.
- Mineral wool or other backing is fitted where required.
- 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.
Before we start on site
- Send any specification or drawings in advance
- Arrange parking or a loading space
- Point out any areas we must not close
Ask for a quote
Tell us about the building, the joints and when you need the work done, and we’ll put a fixed quote together. The easiest way is to phone 01277 525 020 or email a schedule or drawings.
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Building owners, agents and FMs in Bow
Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.
How the job changes by surface
Plastic pipes
Plastic waste pipes through slabs come up often. Whether sealant alone is acceptable depends entirely on the tested detail.
Masonry and concrete
Openings through concrete vary from tidy cores to rough break-outs. The gap is measured at the widest point against the detail’s limits, and any that don’t are flagged.
Keeping the joints sound
For the best life from the joints:
- Look above ceilings when tiles are lifted for other jobs
- Ask which product is in place before decorating
- Put resealing into every M&E and fit-out package
- Don’t let anyone top up a fire seal with the wrong product
Keep the product data and installation details with the building’s fire safety information. It makes later repairs much easier to match.
Ask every contractor who works in risers or voids to report openings they create. It costs little and catches breaches early.
What sealant work can’t fix
Before quoting, we check that sealant is the right answer. It won’t put right:
- Plastic pipes whose detail calls for a collar or wrap
- Designing or specifying fire stopping, which sits with the designer or fire engineer
- Gaps in walls that were never built as compartment walls
If in doubt, call 01277 525 020 or email us and we will say what we think.
Joints and surfaces we work on
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Cable penetrations
- Joints between fire-resisting walls and floors
- Linear gaps at wall heads
- Pipe penetrations
Bow: questions and answers
How does the move away from BS 476 affect penetration seals in Bow?
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. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.
Could you schedule work at a campus like University of Oxford for the vacation?
Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
How do we ask for a quote?
It works in four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.
What do you charge?
It depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a fixed quote.
Does weather matter for sealant work?
It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.
Can the sealant be colour-matched?
Often, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We confirm what’s available for the specified product when we quote.
What happens if old sealant might contain asbestos?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and work stops until any suspect material has been tested. Removing asbestos is a job for asbestos specialists, not us.
Fire stopping in Bow: the local picture
Bow is about 61 miles from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal. 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. Either way, we install the specified product to its tested detail.
Theatres, wards and plant rooms at sites like Longworth Hospital (3.9 miles west of Bow) all have compartment walls crossed by services. Older community buildings such as Church of St Denys that have been rewired or given new heating can have service gaps through walls worth checking against the specification. Schools such as Stanford in the Vale Church of England Primary School often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards.
Bow is about 4 miles east of Faringdon, in Oxfordshire. Anywhere in SN7, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Across Oxfordshire, 423 places are covered, including Bow. Our Oxford page has more on work in that area, about 14 miles away.
Commercial sites across SN7 are covered for service penetrations. Among the streets we cover are Chapel Road, High Street and Sheards Lane, and sites on any of them can send details for a fixed quote. Just outside Bow, we also work in Stanford in the Vale (1 mile west), Hatford (1 mile north-west), Shellingford (2 miles west), Baulking (2 miles south-west) and Buckland (3 miles north). Bigger towns within reach include Oxford (14 miles north-east), Didcot (11 miles east), Abingdon-on-Thames (10 miles east), Witney (10 miles north), Carterton (10 miles north-west) and Wantage (5 miles south-east).
Landmarks near Bow
Around Bow, our work takes us to commercial buildings near Former Red Lion Public House and Holy Trinity Church, among other places. A little further out are Faringdon Museum (3.8 miles west) and Faringdon Castle (3.4 miles north-west).