Hertfordshire · England
Gosmore Fire Rated Sealant
Our applicators work in Gosmore on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Ordinary sealant used where a fire-rated product was needed
- Linear gaps at the head of walls
- Fire seals that have cracked with movement
Fire rated sealant in Gosmore
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, with a record of the products and locations if you need one. We work on flats & HMOs, door frames and service penetrations, and common reasons people get in touch are unsealed gaps where pipes and cables go through a wall and old fire sealant that has split or come away.
For a small place like Gosmore, the journey and timings are agreed in advance, so the job can fit around bookings, guests or opening times where possible.
We stand behind the work with a 12-month guarantee.
- Where
- Gosmore (SG4)
- Wider area
- Hertfordshire
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Masonry and concrete
Brick, block and concrete walls and floors are sealed with products tested in masonry. We clean out dust and debris before sealing so the seal has something sound to bond to.
Plasterboard walls
Holes in plasterboard are often cut roughly for services. Where a hole is bigger than the sealant’s tested range, it needs another approach, and we will tell you.
Questions from Gosmore
Do you take on hotel work around Gosmore?
Yes, hotels and guest houses are among the places we work. Rooms can be done a few at a time, so the building stays open.
I let a flat near Hitchin station. Can you help?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Can you seal over the old sealant?
No. The old sealant always comes out first.
What does fire rated sealant cost?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email and let us know what needs doing and where.
Can I use normal mastic around a pipe through a fire wall?
No. A gap that needs fire stopping needs a tested fire-rated product.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do you seal gaps around fire door frames?
Yes. The joint between frame and wall is sealed with a fire-rated sealant following the tested details. The door leaf and its hardware need a door specialist.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
What affects the quote in Gosmore
For a quick quote, just ask. What matters most is:
- The number and length of the joints
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- How easy the joints are to reach
Doing several joints on one visit is generally more efficient than separate visits. We will give you a clear quote for the lot.
What to tell us for a quote
What to tell us when you ask for a quote:
- How we’d reach the joints
- How many joints, rooms or windows are involved
- Photos by email, if that’s easy
- Any previous sealing or DIY work
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
The process
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the job takes from a few hours to a few days, depending on the number of gaps and the access for a typical job. In a small place like Gosmore, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We go through the gaps on your list or survey and check each one’s size and substrate.
- Old or unsuitable sealant is cut out and the gap cleaned.
- We put in whatever backing or fill the product detail specifies.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- We record the locations and products used for your records.
Before we arrive
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For fire rated sealant in Gosmore, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Keep pictures of seals that will be hidden
- Include hidden areas like risers in routine checks
- Never patch a fire seal with standard sealant
- Make resealing part of every contractor’s brief
Avoid covering a sealed gap with anything that isn’t part of the tested detail. Repairs should use a matching fire-rated product. Ask us if you’re not sure which product was used.
A flagged gap shouldn’t wait for the next assessment. Get it sealed and recorded.
What happens if it’s left?
If an assessor has flagged gaps, it makes sense to close them before the next review. Getting them done and written up means you can show the action was taken. Where a wall is exposed, as many are in small places like Gosmore, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- Homes, businesses and hotels
- Trusted Arbo and Everbuild sealants
- Full insurance on every job
- More than 20 years in sealant work
Take a look at how sealant jobs are priced or customer reviews.
Towns and villages near Gosmore
Also in Gosmore
Landlords, agents and businesses in Gosmore
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Commercial buildings in Gosmore
Gosmore has hotels and guest accommodation in and around it. Hotel work can be planned room by room, with out-of-hours working where needed. Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, and gaps around services are often picked up there. We apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
For buildings such as Church of St Ippolyts (church of England), older buildings that have had new heating or wiring often have service gaps worth checking. For landlords with property near Hitchin station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. If you look after a building such as St Ippolyts Church of England Aided Primary School, service openings in fire-resisting walls need checking after any refurbishment.
Gosmore is about 1 mile south of Hitchin, in Hertfordshire. Every kind of property in Gosmore is covered for fire rated sealant, old or new, large or small. The work is guaranteed for a year. 381 places in Hertfordshire are on our list. For nearby work, see our London page.
Postcode districts we cover here for fire rated sealant: SG4. Whether your property is on London Road, Mill Lane and Orchard Close or a nearby road, our applicators can take on the job. Other places close to Gosmore include St Ippolyts (1 mile east), St Ibbs (1 mile south-east), Sperberry Hill (1 mile south-east), Charlton (1 mile north-west) and Little Almshoe (1 mile south-east). We also work in nearby towns such as Hemel Hempstead (15 miles south-west), Stevenage (4 miles south-east), St Albans (13 miles south), Welwyn Garden City (10 miles south), Harpenden (9 miles south-west) and Hatfield (12 miles south).
What’s near Gosmore
In Gosmore, that means homes and buildings near St Mary's Church, Butts Close and The Bird in Hand pub and the streets around them. Nearby too are Hitchin Girls' School (1.1 miles north) and Kingshott School (0.8 miles north-east). Gosmore’s nearest station is Hitchin station, about 1.5 miles north of the centre. Nearby you will also find North Hertfordshire Museum (1.3 miles north) and Wymondley Castle (1.7 miles east). The countryside around Gosmore includes Markham's Hill and Purwell Ninesprings.