Hertfordshire · England
North Mymms Fire Rated Sealant
Intumescent and fire-rated sealant around gaps, frames and service penetrations in North Mymms, with a 12-month guarantee on every job. Ask us for a quote.
- Joints picked up in a fire-stopping survey
- Fire stopping disturbed by later work
- Open gaps behind door architraves
About our fire rated sealant in North Mymms
A fire seal relies on being installed the way it was tested: the right depth, the right backing and the right product for the substrate. That detail is what we take care over, gap by gap. If you have unsealed gaps where pipes and cables go through a wall and unsealed gaps around fire door frames, we can help.
For holiday lets, converted business premises or a community building near North Mymms, the washrooms, kitchens and any fire-rated joints need the same care as a big site.
Big or small, you get the same 12-month guarantee.
- Location
- North Mymms (AL9)
- Region
- Hertfordshire
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for North Mymms
Can you help a landlord with a rental near Brookmans Park station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Do you cover smaller places like North Mymms?
Yes. North Mymms is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Are you insured?
Yes. Full insurance covers our work.
What does intumescent mean?
An intumescent sealant expands when it gets hot. It’s one type of fire-rated sealant; which product suits depends on the gap, the substrate and the service.
Can you fill the gap behind a fire door frame?
Yes, if the gap is within the product’s tested range. Our work is the gap around the frame.
Can I choose the sealant colour?
Normally, yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before any work starts.
How long does the job take?
Typically it takes from a few hours to a few days, depending on the number of gaps and the access. Bigger jobs take longer.
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes a few hours for a handful of gaps, and longer for a whole building from start to finish. For a village or hamlet like North Mymms, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We plan the order of work and access, floor by floor or flat by flat.
- We take out any damaged or unsuitable sealant.
- Dust and loose debris are cleaned from each gap.
- We apply and tool the sealant to the product’s tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
How to prepare
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
- Keep children and pets away from the work area
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.
Advice
Surface by surface
Service penetrations
Service penetrations are where new gaps often appear. We clean out what’s there and reseal to the right depth with backing where the detail needs it.
Linear gaps
Long, narrow gaps appear where walls meet slabs and ceilings. We seal them to the tested detail, with backing where it’s needed.
Quotes for fire rated sealant in North Mymms
Your quote is based on your job. We look at:
- The size of the job
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- Any working-time requirements on site
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- How many joints, rooms or windows are involved
- Photos by email, if that’s easy
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
Want a quote for fire rated sealant? Please phone 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before work begins.
When it is not the sealant
Before you book, it’s worth knowing the limits:
- Large holes that need a different fire-stopping system
- Deciding what fire stopping a building needs
- Issuing a fire rating or certificate for a building
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Surfaces we seal
- Service penetrations
- Flats & HMOs
- Door frames
- Linear gaps
- Plasterboard & masonry
- Pipe & cable gaps
What we are called out for in North Mymms
Sometimes the wrong product was used from the start: general-purpose foam, everyday silicone or caulk where a fire-rated seal was needed. It looks sealed, but it is not fire-rated.
If you can see any of these, it’s time to have the joints looked at:
- Fire seals that have cracked with movement
- Ordinary sealant used where a fire-rated product was needed
- Sealant items on a fire risk assessment action list
- Holes left by a change of layout
Letting a property close to Brookmans Park station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
What your quote should include
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
- Are they insured?
- What the quote includes, VAT included or not
Fire rated sealant around North Mymms
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 apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
If you look after a building such as Brookmans Park 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 Mary the Virgin, gaps around pipes and cables are worth checking after any building work there.
North Mymms is about 2 miles north-west of Potters Bar, in Hertfordshire. We carry out fire rated sealant for homes and businesses in North Mymms and nearby. Our Hertfordshire coverage runs to 381 places, and North Mymms is one of them. For nearby work, see our London page (16 miles or so).
Jobs for fire rated sealant in AL9 works the same way as everywhere else we cover. Streets in the area include St Mary's Church Road, Abdale Lane and Warrengate Road, all of which we cover. Close by, we work in Welham Green (1 mile north), Colney Heath (2 miles north-west), Sleapshyde (3 miles north-west), Hatfield (3 miles north) and Shenleybury (3 miles west). We also work in nearby towns such as Watford (9 miles south-west), Hemel Hempstead (11 miles west), Stevenage (13 miles north), St Albans (5 miles north-west), Welwyn Garden City (6 miles north) and Harpenden (9 miles north-west).
Landmarks near North Mymms
In North Mymms, that means homes and buildings near Chancellor's School, North Mimms Park and The Old Maypole Public House, among other places. North Mymms’s nearest station is Brookmans Park station, about 0.7 miles east of the centre. Other landmarks nearby include Shenley Hospital (3.5 miles south-west) and Potters Bar Museum (2 miles south-east). Open spaces near North Mymms include Furzefield Wood and Lower Halfpenny.
Towns and villages near North Mymms
Other services in North Mymms
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Include fire stopping when you schedule refits
- Ask which product was used before you paint
- Keep the record of products and locations with your fire safety documents
- Ask every contractor to reseal any fire stopping they disturb
Tell other trades that the gaps have been sealed, and ask them to reseal anything they cut through. A lot of damaged fire stopping comes from later work.
If a fire risk assessment has flagged a gap, do not leave it for the next one. Get it sealed and recorded.
Landlord and commercial work in North Mymms
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
We work for landlords and letting agents as well as homeowners. Sealant work between tenants keeps a property looking cared for.