Fire stopping in Colworth
Commercial sealant work in Colworth for contractors, FMs and building owners: fire-rated and intumescent sealing of service penetrations and linear gaps, with a fixed quote first.
- Hidden openings found during inspections
- Open linear gaps along the top of fire-resisting walls
- Seals that don’t match their tested detail
Fire stopping for Colworth sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping in Colworth, done properly
Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4, with results classified under BS EN 13501-2. A rating such as EI 60 only holds when the product is installed as it was tested. So our job is to reproduce that arrangement faithfully. We work on linear gaps at wall heads, service gaps in risers and joints between fire-resisting walls and floors, and the failures we’re asked to look at most are penetration schedules that need working through and openings found when ceilings come down for a refit. A specialist sealant contractor works differently from a general builder: on jobs in Colworth, preparation and product choice get the time they need.
Around smaller places like Colworth, 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.
A 12-month guarantee applies to all our work in West Sussex. If an installation problem shows up, ring 01277 525 020 or email the details over and we’ll arrange a return visit.
- Location
- Colworth (PO20)
- Wider area
- West Sussex
- Cover
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Your questions answered
Is Colworth too small for you to travel to?
No. Small places get the same service as large ones. We work across Greater London and the South East. Good photographs up front let us bring everything on the first visit.
Can you work around term dates at a campus such as University of Chichester?
Yes. We plan campus work around teaching, exams and residence turnarounds. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Are you insured?
Yes. Mastic Doctor is fully insured, public liability included.
How long before the joints can be used?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, so we’ll confirm the curing time on the day.
Is sealant suitable for all service openings?
No. It depends on the tested detail for that wall or floor and service. Collars, wraps, batts and boards exist for openings sealant doesn’t cover, and we’ll tell you when that applies.
What’s the quickest route to a quote?
The quote form is the simplest route, though you can also call the office on 01277 525 020 or send details through our quote form. Include photos or drawings if you have them.
How long does a job like this take?
We plan the time on site around your programme and access. We’ll give you an estimate of time on site when we quote.
Surface by surface
Cables and cable bundles
Single cables and small bundles are often within a fire-rated sealant’s tested detail. Bundle size, cable type and the space between cables all matter, so we check before sealing.
Masonry and concrete
Many seals are made in blockwork, brickwork or concrete slabs. Dust and debris are cleared from the opening, with backing added if the detail requires it.
Looking after the joints
Every sealant joint needs some looking after, and how long they last depends on how they’re treated. Our advice:
- Brief every trade that openings they make must be sealed
- Settle who seals which penetrations at the start of a project
- Foam or ordinary sealant is never a fire-seal repair
- Treat an open penetration as a priority repair
Don’t patch a fire-rated seal with anything outside its tested detail. A repair should use the original product, installed the same way, 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.
More services for Colworth
Commercial clients in Colworth
Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.
Building owners and managing agents use us on sealant work across single buildings or whole portfolios. One quote can cover more than one site, which keeps the paperwork simple.
Compartments and services around Colworth
Colworth is about 54 miles from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls. Fire stopping of openings and penetrations in England falls under Approved Document B. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail.
Offices at parks like The Woodhorn Business Centre (to the north of Colworth) are re-cabled with each new tenant, and compartment walls need sealing afterwards to the tested detail. Hospital estates such as Bognor Regis War Memorial Hospital (2.2 miles south-east of Colworth) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.
Colworth is about 2 miles north of Bognor Regis, in West Sussex. We cover Colworth, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 373 places in West Sussex, from busy centres to rural villages. Sites around Portsmouth have their own page, about 16 miles away.
Business premises anywhere in PO20 are within our area. We also cover Merston (1 mile west), Oving (2 miles north-west), Lagness (2 miles south-west), Runcton (2 miles west) and Shopwyke (2 miles north-west) for service penetrations. Bigger towns within reach include Worthing (13 miles east), Chichester (4 miles north-west), Selsey (7 miles south-west), Littlehampton (8 miles east), Rustington (9 miles east) and Storrington (13 miles north-east).
Landmarks near Colworth
We work on buildings around The Regis School and The Brooks Local Nature Reserve, among other places. The nearest railway station is Bognor Regis station, about 2.5 miles south-east. Well-known places in the area include Bognor Regis Museum (2.7 miles south-east) and Tote Copse Castle (1.3 miles north-east).
Do you need fire stopping in Colworth?
Fire stopping can get squeezed at the end of a programme, or done by whoever is on site. That is how unsuitable products and improvised details end up in compartment walls and later need putting right.
Look out for the following:
- Old intumescent sealant that has split away
- Service penetrations left open after M&E works
- Fire-stopping items raised at inspection or handover
- Head-of-wall gaps with no fire seal
At a college such as West Sussex Alternative Provision College (2.5 miles west of Colworth), checking penetration seals after summer M&E works is good practice.
Comparing quotes
- Their plan for phasing and protecting the area
- Which product they’ll use, and why it suits the joint
- Do they follow the manufacturer’s priming guidance?
- Their approach to joint depth and backing
From enquiry to sign-off
Where the site stays busy, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then handed back before we move to the next. Smaller jobs around Colworth can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.
- The specification and schedule come first, so we know which details apply.
- We plan the sequence of floors, risers and voids with you.
- Each opening is checked for wall or floor type, service, gap and depth.
- Foam, ordinary sealant and debris come out.
- The specified backing and sealant go in to depth and are finished neatly.
- Anything outside the detail is reported to you rather than sealed.
Preparing the site
- Make sure the joints can be reached
- Share your working hours and any access restrictions
- For older buildings, check the asbestos register before work
Get a fixed quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.
Read more
What sets the cost
What shapes the price:
- Induction, permit and paperwork requirements
- Any access equipment needed
- The size and state of each joint
- Location, for remote and island sites
We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote and we’ll price your job on its own details.
What we need to price the job
A few photos plus some basic facts will normally do. It helps to include:
- The asbestos register, for older buildings
- Drawings or a marked-up plan, if available
- The site address and postcode
- The type of building and who uses it
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, speak to us on 01277 525 020 or email us.