Buckinghamshire · England
Fire-rated sealant in Grendon Underwood, Buckinghamshire
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Grendon Underwood and across Buckinghamshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints picked up in a fire-stopping survey
- Door frames with gaps between frame and wall
- Ordinary sealant used where a fire-rated product was needed
About our fire rated sealant in Grendon Underwood
Ordinary silicone or decorators’ caulk in a fire-stopping gap is not a fire-rated seal. Anything unsuitable comes out first and the gap is resealed with a product tested for that use. We work on plasterboard & masonry, door frames and linear gaps, and people most often call us about unsealed gaps around fire door frames and ordinary sealant used where a fire-rated product was needed.
Somewhere as small as Grendon Underwood, commercial jobs tend to be pubs, holiday lets, farm buildings or halls rather than offices. Each still needs sound sealant in its washrooms and kitchens, and fire-rated joints where services pass through walls.
Our work is backed for twelve months, in Grendon Underwood and everywhere else we cover.
- Place
- Grendon Underwood (HP18)
- Wider area
- Buckinghamshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Fire rated sealant around Grendon Underwood
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.
For site and facilities teams at buildings such as Grendon Underwood Combined School, fire-stopping around service openings should be restored whenever new services go in.
Grendon Underwood is about 6 miles east of Bicester, in Buckinghamshire. From the centre of Grendon Underwood to the outskirts, we cover fire rated sealant for every kind of property. Grendon Underwood is one of 263 places in Buckinghamshire we cover for fire rated sealant. There’s also a page for Oxford, roughly 13 miles from Grendon Underwood.
Work in HP18 is quoted and booked the same way as anywhere else. We cover properties on Main Street, The Firs and Darley's Close and the roads around them. We also cover the places around Grendon Underwood: Edgcott (1 mile north), Ludgershall (2 miles south-west), Piddington (3 miles south-west), Blackthorn (4 miles west) and Brill (5 miles south-west). Further out, we also cover Aylesbury (9 miles south-east), Buckingham (8 miles north), Elmhurst (9 miles south-east), Southcourt (10 miles south-east), Princes Risborough (13 miles south-east) and Haydon Hill (8 miles south-east).
Local landmarks in Grendon Underwood
Green spaces nearby include Upper Ray Meadows.
Common problems we fix in Grendon Underwood
Much fire stopping is hidden: in ceiling voids, service risers and behind boxing. Because nobody sees it, gaps go unnoticed until an assessor or surveyor looks.
The most common problems we see are:
- New service routes left unsealed after building work
- Open joints along the top of partitions
- Gaps flagged on a fire risk assessment
- Old fire sealant that has split or come away
For buildings such as Church of St Leonard, older buildings that have had new heating or wiring often have service gaps worth checking.
Before you book anyone
- What insurance they hold
- What product goes in the joint
- Is the old sealant removed completely?
- Who turns up on the day
When something else is needed
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Construction that doesn’t provide fire resistance on its own
- Sign-off of the building, which sits with building control or your assessor
- Large holes that need a different fire-stopping system
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before you book.
Surfaces we seal
- Pipe & cable gaps
- Service penetrations
- Plasterboard & masonry
- Door frames
- Linear gaps
- Flats & HMOs
How we quote for fire rated sealant
Some jobs are bigger than they look, and some smaller. What affects the quote:
- When we can work, for business premises
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
- The type of sealant required
What you pay reflects the work, not guesswork. That is why we ask about the job first and send you a clear quote before we start.
What we need to know
What to tell us when you ask for a quote:
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that’s easy
- How we’d reach the joints
- Whether it has been sealed before
We don’t publish a price list. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or drop us an email.
What the job involves on each surface
Door frames
A door can only do its job if the gap behind its frame is sealed too. We seal that gap with a fire-rated sealant suited to the frame and wall.
Linear gaps
Some linear gaps have to cope with movement as well as fire. The product and depth are chosen to suit both, following the tested detail.
Also near Grendon Underwood
What else we do in Grendon Underwood
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
For anyone letting property in or around Grendon Underwood, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Your questions about fire rated sealant in Grendon Underwood
Is there a guarantee on fire rated sealant in Grendon Underwood?
All our work, in Grendon Underwood and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Is Grendon Underwood in your area for fire rated sealant?
Yes. Our work covers London and the South East, and Grendon Underwood is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Can I choose the sealant colour?
In most cases you can choose. We’ll explain which colours are available.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
What does intumescent mean?
Intumescent means it swells when heated, helping close the gap. Intumescent sealants are one kind of fire-rated sealant; which product suits depends on the gap, the substrate and the service.
Will we have a record of what was sealed?
Yes. We record the locations we’ve sealed and the products used to keep with your fire safety documents.
Are you insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
The process
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the work takes from a few hours to a few days, depending on the number of gaps and the access in most cases. Somewhere as small as Grendon Underwood, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start with the survey or action list, checking the size and surfaces of every gap.
- Old or unsuitable sealant is cut out and the gap cleaned.
- Backing or fill is fitted where the product’s tested detail calls for it.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- Finally, we list where we worked and what we used, for your records.
Before we arrive
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or send us an email and describe the job.