Hertfordshire · England
London Colney Fire Rated Sealant
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in London Colney and across Hertfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Open joints along the top of partitions
- Open gaps behind door architraves
- Holes left by a change of layout
What affects the quote in London Colney
The quote reflects the job in front of us. We take into account:
- Whether there’s mould to deal with
- The number and length of the joints
- When we can work, for business premises
- How easy the joints are to reach
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or send us an email for an honest opinion and a quote.
Helping us quote
To make quoting easier, let us know:
- How we’d reach the joints
- The type of property
- Roughly how big the job is
- If someone has resealed it before
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
About our fire rated sealant in London Colney
Where services or frames pass through a fire-resisting wall or floor, the gap around them needs a fire-rated seal. We apply intumescent and fire-rated sealants to the manufacturer’s tested details for each gap. We work on door frames, plasterboard & masonry and linear gaps, and the jobs we see most are gaps left after a refit or conversion and ordinary sealant used where a fire-rated product was needed.
In a smaller place like London Colney, commercial jobs tend to be smaller buildings: a pub, a surgery, a school, a shop or a few business units. Each needs the same care with its sealant as any larger building.
Big or small, it’s backed by our one-year guarantee.
- Place
- London Colney (AL2, AL1)
- Region
- Hertfordshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Check whether a sealant can be painted before decorating over it
- Ask every contractor to reseal any fire stopping they disturb
- Keep general-purpose foam and caulk away from fire-stopping gaps
- Report cracked or damaged seals as soon as you notice them
Include fire stopping in your regular building checks. Watch for cracking, gaps or seals that have been disturbed and have them put right.
A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Sealing it early is a simple step to take.
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes from a few hours to a few days, depending on the number of gaps and the access, depending on how much there is to do. In a smaller place like London Colney, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- Before starting, we go through the specification or action list with you.
- We measure every gap and note what it’s in and what passes through.
- Unsuitable material such as ordinary foam or silicone is cut out and the gap cleaned.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products for your records.
Getting ready for the visit
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
Getting a quote
We quote each job on its own, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details, and photos are welcome.
Related advice
Leave it or put it right?
A quick fill with any sealant to hand is not fire stopping. Fire-rated products are tested in set gap sizes, depths and substrates, which is why we match the product and the method to each gap. In an older home around London Colney, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why book with us
- Anti-fungal silicone where joints get wet
- Any old sealant cut out fully, not covered over
- Domestic, commercial and hotel work
- We leave the area clean and tidy
Read our cost guide and our reviews.
London Colney questions
Can you do fire rated sealant in London Colney?
Yes. Our work covers London and the South East, and London Colney is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
Can you help a landlord with a rental near Park Street station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
What fire rating will the seal have?
We don’t give ratings or certificates for our work. Your specification sets the requirement, and we fit a product whose tested details meet it.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or send us an email.
Are you insured?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Do you seal gaps around fire door frames?
Yes, if the gap is within the product’s tested range. We seal the frame-to-wall gap, not the door itself, and we will mention anything we notice about the door.
How long does the job take?
Most jobs take from a few hours to a few days, depending on the number of gaps and the access, including preparation and clearing up. We’ll confirm how long when we quote.
Landlord and commercial work in London Colney
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Towns and villages near London Colney
Also in London Colney
What fire rated sealant looks like in London Colney
In England, the Regulatory Reform (Fire Safety) Order 2005 requires a fire risk assessment for workplaces and for the common parts of blocks of flats, which is often where open fire-stopping gaps are first noticed. We work to the specification you’re given, installing the product to its tested details.
Rented homes near Park Street station change hands often, and new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. For site and facilities teams at buildings such as Bowmansgreen Primary School, fire-stopping around service openings should be restored whenever new services go in. If you look after a church, hall or community building such as Church of St Peter, service openings in its walls need the right fire-rated sealant, as in any building.
London Colney is about 2 miles south-east of St Albans, in Hertfordshire. We carry out fire rated sealant for homes and businesses in London Colney and the surrounding area, as part of our work across Hertfordshire. London Colney is one of 381 towns and villages in Hertfordshire we cover. London is on our list too, around 18 miles away.
Here we cover the AL2 and AL1 postcode area for fire rated sealant. Whether your property is on High Street, London Road and Haseldine Road or a nearby road, we can help. Other places close to London Colney include Broad Colney (1 mile south), Tyttenhanger (1 mile north), Shenleybury (1 mile south), Sleapshyde (2 miles north-east) and Colney Heath (2 miles north-east). Within a short drive, we also cover Watford (6 miles south-west), Hemel Hempstead (7 miles west), Stevenage (14 miles north), Welwyn Garden City (7 miles north-east), Harpenden (7 miles north) and Hoddesdon (12 miles east).
Landmarks near London Colney
We work in homes and buildings around White Horse pub, Highfield Park and Samuel Ryder Academy, among other places. For rail, the closest station is Park Street station, about 1.9 miles west of the centre. A little further out are Napsbury Hospital (0.5 miles west) and St Albans Musical Museum (2.6 miles north-west). Open spaces near London Colney include Verulamium Lake and Broad Colney Lakes.
When it is not the sealant
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Sign-off of the building, which sits with building control or your assessor
- Big openings where sealant alone is not the tested solution
- Fire risk assessments, which need a qualified assessor
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Pipe & cable gaps
- Flats & HMOs
- Plasterboard & masonry
- Linear gaps
- Door frames
- Service penetrations