Fire stopping in Colwood
Fire-rated and intumescent sealing of service penetrations and linear gaps across Colwood, by CSCS-carded applicators. CHAS accredited and fully insured.
- Snag lists that include open service penetrations
- Openings found when ceilings come down for a refit
- Openings left by services added after handover
Fire stopping in Colwood
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Site staff or a sealant specialist?
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.
Fire stopping in Colwood, done properly
Facilities managers in Colwood often find open service penetrations when ceilings come down for other work. Where the walls and floors already have a fire-stopping specification, we can work to it using the product and detail it sets out. With no specification in place, the first step sits with your designer or fire engineer, not with us. We work on pipe penetrations, joints between fire-resisting walls and floors and linear gaps at wall heads, and what we’re called in for most is fire-stopping items raised at inspection or handover and unsealed joints where partitions meet the slab. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Colwood it comes down to the same thing: the right product in a properly prepared joint.
A job near Colwood is usually planned around one visit, with the specification and photographs sent in advance. Design and sign-off belong to the designer or building control; we install what’s specified.
Work we carry out comes with a 12-month guarantee. If an installation problem shows up, ring 01277 525 020 or send details through our quote form and we’ll arrange a return visit.
- Where
- Colwood (RH17)
- Region
- West Sussex
- Cover
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Signs you need fire stopping in Colwood
When a seal departs from its tested detail, the evidence no longer covers it. Gaps beyond the tested size, shallow sealant, no backing where it was needed, or products from different systems mixed together are what we find most often.
These are often picked up first by site or facilities staff:
- Fire-rated sealant that has cracked or shrunk back
- Unsealed joints where partitions meet the slab
- Unsealed openings around new pipes and cables
- Penetration schedules that need working through
Where a unit on an estate such as Crosspot Industrial Estate, 1.5 miles south-east of Colwood, has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail.
Before you book anyone
- The terms of the workmanship guarantee
- Will RAMS and insurance details be available?
- How joint depth will be controlled
- How the joint faces will be prepared and primed
Why deal with it now?
A seal that doesn’t match its tested detail gives false comfort. The fix is to remove it and reinstall to the detail, and doing it once, properly, is cheaper. Older rural buildings around Colwood move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.
Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote and we will put a fixed figure on it.
Why choose Mastic Doctor in Colwood
- Work carried out by CSCS-carded applicators
- One number for every site we cover
- Sealing commercial buildings since 2005
- Workmanship guaranteed for 12 months
Read our cost guide or how we’re accredited.
Looking after the joints
Your facilities or cleaning team can help the joints last. Pass these on to them:
- Treat an open penetration as a priority repair
- Check risers and ceiling voids after each round of works
- Arrange inspection before areas are covered up
- Record which product was used where
New services after handover are a common way fire stopping gets breached. Building it into each contractor’s sign-off keeps the walls intact.
Keep a register of where seals are and what they are made of. It tells the next contractor exactly what to reinstate, and it helps at inspections.
Your questions answered
Is Colwood off your patch?
Not at all. Colwood is within our area. We work across Greater London and the South East. Good photos up front let us bring everything on the first visit.
Do you cover business parks and estates near Colwood, such as Crosspot Industrial Estate?
Yes. Estates, retail parks and business parks around Colwood, Crosspot Industrial Estate among them, are all within reach. Photos and a short description are enough for a first look.
Can you handle several sites?
Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.
How long will the new sealant last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
Is the work guaranteed?
Yes. Workmanship is guaranteed for 12 months.
Do you have public liability insurance?
Yes. We are fully insured, including public liability cover.
Is it fine to apply new sealant on top of old?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
Nearby places to Colwood
More services for Colwood
From enquiry to sign-off
Diagnose, treat, sign off: every visit follows that pattern. We inspect the joints and confirm what’s in scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. If others near Colwood need work, visits can be combined. You’ll have a fixed quote before work starts.
- We ask for the product and detail your designer has specified.
- Openings are measured and grouped by detail.
- 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
- Point out any areas we must not close
- Confirm the product named in the specification
- Make sure the joints can be reached
Ask for a quote
A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or phone 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.
Advice
Different surfaces, different methods
Drylining partitions
Drylined fire walls are tested in a particular build-up. The sealant detail has to be tested in that wall type, with the stated board layers first.
Small ducts
Ducts are only sealed with sealant where the detail allows it. Dampers and ductwork systems themselves are outside our work.
Fire-rated sealing for Colwood buildings
Colwood is about 35 miles from central London. Office refits around the commuter belt bring new cabling through fire-resisting walls, and the gaps need sealing with the specified product. There are several hotels within about 2 miles of Colwood. In hotels, bedroom and corridor walls are typically fire-resisting, so services added in a refit need sealing with the specified product.
On a hospital site such as The Dene Hospital (3.8 miles south-east of Colwood), fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits.
Colwood is about 5 miles north-west of Burgess Hill, in West Sussex. We cover commercial sites throughout Colwood, whether it’s a single job or part of a planned programme. Our West Sussex coverage takes in 373 places, large and small. We also cover Brighton, some 13 miles away.
Work on service penetrations is covered throughout RH17, for business premises of every kind. Among the streets we cover are Earwig Lane and Cross Colwood Lane, and sites on any of them can send details for a fixed quote. We also cover Crabtree (1 mile north-west), Lower Beeding (2 miles north-west), Slaugham (3 miles north), Plummers Plain (3 miles north) and Monk's Gate (3 miles north-west). Nearby towns on our patch include Crawley (8 miles north), Horsham (6 miles north-west), Worthing (15 miles south-west), Haywards Heath (6 miles east), Burgess Hill (5 miles south-east) and East Grinstead (13 miles north-east).
Local landmarks in Colwood
In Colwood, that means premises near Leonardslee. Well-known places in the area include The Dene Hospital (3.8 miles south-east) and Cuckfield Museum (3.7 miles east). Green spaces nearby include Blunts Wood and Paiges Meadow.