Fire-rated sealing and fire stopping in Sacombe Green, Hertfordshire
Planning work on a service penetration in Sacombe Green? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Fire sealant pulled out of the opening
- Unsealed openings around new pipes and cables
- Expanding foam used as fire stopping
Need fire stopping in Sacombe Green?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Fire stopping in Sacombe Green
Sealant is the specified answer for plenty of openings, such as metal pipes, cables and some small ducts where the detail covers them. Larger openings and some plastic pipes call for collars, wraps, batts or boards instead. We use sealant where it is the specified product, and we tell you when a detail calls for something else. We work on small duct penetrations where the tested detail allows, pipe penetrations and joints between fire-resisting walls and floors, and the failures we are asked to look at most are non-fire-rated filler around services and unsealed joints where partitions meet the slab. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Sacombe Green it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Barn and farm-building conversions near places like Sacombe Green often combine new partitions with old walls. A penetration seal only performs as tested if product, substrate, service, gap and depth all match the detail.
We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant, and we come back if anything isn’t right.
- Where
- Sacombe Green (SG12)
- Region
- Hertfordshire
- Cover
- 12 months on our workmanship
- Quotes
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Your questions answered
Do you take on work at healthcare sites like Hertford County Hospital?
Yes, hospitals are one of the sectors we cover. Work is phased so departments keep running, under the site’s own rules.
Is Sacombe Green too small for you to travel to?
Not at all. Sacombe Green is within our area. London and every South East county are within our area. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.
Can you fire stop behind the services contractors?
Yes. Share the penetration schedule and product details and a fixed quote follows. We can follow the services contractor floor by floor so areas aren’t left open.
Do you offer coloured sealant?
Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We will confirm the colours available for the specified product.
What changes on 2 September 2029?
For buildings in England, Approved Document B removes BS 476 references from 2 September 2029. Products are then judged on BS EN 13501-2 classifications, though transitional rules apply. Scotland follows its own Technical Handbook, with clause 2.1.14 covering service penetrations.
Can you follow the specification on our project?
Yes. Send it with your enquiry, and the quote will be based on it, flagging anything that needs clarifying.
What do BS EN 1366-3 and BS EN 13501-2 mean?
The tests are BS EN 1366-3 for penetrations and BS EN 1366-4 for linear joints, and classification is to BS EN 13501-2. An EI 60 seal kept its integrity and insulation for 60 minutes as tested; installing to the detail is what carries that across to site.
Keeping the joints sound
A few simple habits keep the new joints working:
- Agree the fire-stopping specification before services go in
- Brief every trade that openings they make must be sealed
- Ask which product is in place before decorating
- Look above ceilings when tiles are lifted for other jobs
Allow the manufacturer’s stated cure time before boxing in or decorating. Some fire-rated sealants accept paint and some don’t, and the data sheet says which.
Keep a register of where seals are and what they are made of. When a new service goes through, everyone knows which product and detail to match, and it helps at inspections.
Honest limits
A proper diagnosis includes knowing what sealant can’t do. We’ll tell you if the real problem is one of these:
- Issuing fire ratings or certificates for seals
- Designing or specifying fire stopping, which sits with the designer or fire engineer
- Openings that need collars, wraps, batts or boards rather than sealant
If in doubt, call 01277 525 020 or email the details over 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
- Pipe penetrations
- Joints between fire-resisting walls and floors
- Service gaps in risers
- Cable penetrations
Different surfaces, different methods
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.
Drylining partitions
Drylined fire walls are tested in a particular build-up. We check that the product’s detail covers that partition type and board thickness before sealing.
Diagnose, treat, 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 Sacombe Green, tell us how to find it and who will meet us. Add it to your enquiry and we’ll build it into the plan.
- 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.
What we need from you
- Agree which areas must stay open
- Send your site hours and access windows
- Let us know about inductions and permits
Quotes
To get a fixed quote, give us a call on 01277 525 020 or email a schedule or drawings, telling us the site location and the nature of the job. Our quote form is another easy route.
Read more
Why deal with it now?
An improvised seal can look finished while offering no tested performance. Correcting it means cutting it out and starting again with the specified product, so it makes sense to get it right first time. Halls, stores and units around places like Sacombe Green may not be checked every day, so a failed joint can leak for a while before anyone sees it. Resealing early avoids that.
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.
Why appoint us
- Constructionline member for supplier checks
- Products installed to the manufacturer’s instructions
- Over 20 years of commercial sealing
- Workmanship guaranteed for 12 months
Read how commercial sealant jobs are priced or our accreditations and insurance.
Fire-rated sealing for Sacombe Green buildings
At about 25 miles from central London, Sacombe Green is within reach of the capital. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls; the gaps need the specified seal. Approved Document B is the English guidance that covers fire stopping around 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. We install whatever has been specified, to the product’s tested detail.
In a building such as Church of St Katherine, any service penetration through a fire-resisting wall should be sealed to the specified detail. Holiday works at schools like Ralph Sadleir Middle School often leave service openings to seal before pupils return.
Sacombe Green is about 3 miles north of Ware, in Hertfordshire. Any commercial site in Sacombe Green is covered. Our Hertfordshire coverage takes in 371 places, from busy centres to rural villages. We also cover London, some 25 miles away.
We take on service penetrations across the SG12 postcode area. Buildings on Rowney Lane and Marshall's Lane are within our area. We also cover Sacombe (1 mile west), Standon Green End (1 mile east), Dane End (1 mile north-west), High Cross (2 miles south-east) and Tonwell (2 miles south). Nearby towns on our patch include Stevenage (7 miles north-west), St Albans (14 miles south-west), Bishop's Stortford (9 miles east), Welwyn Garden City (7 miles south-west), Harpenden (13 miles west) and Hitchin (11 miles north-west).
Local landmarks in Sacombe Green
The nearest railway station is Watton-At-Stone station, roughly 3 miles west. A little further out are Benington Castle (3.8 miles north-west) and Hertford Railway Museum (3.9 miles south-west). Open spaces near Sacombe Green include King's Meads.
Towns and villages near Sacombe Green
Other services in Sacombe Green
When to call us in Sacombe Green
A common fault is a product that was never fire-rated in the first place: expanding foam or a general-purpose sealant pushed into a gap to tidy it. It may look closed, but it has no tested fire performance in that position.
Most enquiries start with one or more of the following:
- Fire seals cut back for extra cables and never reinstated
- Unsealed joints where partitions meet the slab
- Old intumescent sealant that has split away
- Improvised or mixed-product fire seals
Wherever services are added at a hospital such as Hertford County Hospital, 4.7 miles south of Sacombe Green, the compartment line has to be made good with the specified product.
Comparing quotes
- What level of public liability insurance do they hold?
- Who will actually carry out the work
- Are they CHAS accredited or on Constructionline?
- Will RAMS and insurance details be available?