Hertfordshire · England
Fire Rated Sealant in Pegsdon
Fire-stopping gaps in Pegsdon need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Gaps around pipes and cables through fire-resisting walls
- Fire stopping disturbed by later work
- Open joints along the top of partitions
What affects the quote in Pegsdon
We quote each job individually. This is what makes a difference:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- How much there is to do
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 the work is at height. We take all of that into account in your quote.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- The address or postcode of the job
- Photos by email, if that is easy
- The problem you’ve noticed
- The rough size of the job
Asking for a quote is easy: tell us what needs doing and where and its rough size. Photos by email help us understand the job.
Fire rated sealant for homes and businesses in Pegsdon
Filling a fire-stopping gap with standard silicone or caulk doesn’t make it fire-rated. Anything unsuitable comes out first and the gap is resealed with a product tested for that use. We work on door frames, linear gaps and plasterboard & masonry, and the jobs we see most are standard silicone or caulk in a fire-stopping gap and new service routes left unsealed after building work.
If you have holiday lets, a converted barn used for business or a community building near Pegsdon, the washrooms, kitchens and any fire-rated joints need the same care as a big site.
Big or small, it’s backed by our one-year guarantee.
- Location
- Pegsdon (SG5)
- Region
- Hertfordshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Pegsdon
Also in Pegsdon
Questions from Pegsdon
Can you help a landlord with a rental near Hitchin station?
Yes. We work for landlords and letting agents as well as homeowners. You can call 0345 464 0079 or email us with the details for a clear quote.
Is Pegsdon within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Are you insured?
Yes. Full insurance covers our work.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What does intumescent mean?
An intumescent sealant expands when it gets hot to help seal the gap. It’s one type of fire-rated sealant; which product suits depends on the gap, the substrate and the service.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Commercial buildings in Pegsdon
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.
Schools such as Hexton Junior Mixed and Infant School are buildings too, and fire-stopping around service openings should be restored whenever new services go in. For buildings such as Church of St Faith (Church of England), gaps around pipes and cables are worth checking after any building work there.
Pegsdon is about 4 miles west of Hitchin, in Hertfordshire. From the centre of Pegsdon to the outskirts, fire rated sealant is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 381 towns and villages across Hertfordshire. We also work in London, about 34 miles from Pegsdon.
Jobs for fire rated sealant in SG5 is quoted and booked the same way as anywhere else. Streets in the area include Hitchin Road, Pegsdon Way and Barton Road. Other places close to Pegsdon include Hexton (1 mile west), Pirton (2 miles north-east), Apsley End (2 miles north), The Flints (2 miles south) and Hanscombe End (2 miles north). Further out, we also cover Hemel Hempstead (15 miles south), Stevenage (9 miles south-east), St Albans (14 miles south), Welwyn Garden City (13 miles south-east), Harpenden (10 miles south) and Hitchin (4 miles east).
What’s near Pegsdon
Pegsdon’s nearest station is Hitchin station, about 4.7 miles east of the centre. Well-known places in the area include Keech Hospice Care (3.6 miles south-west) and Ravensburgh Castle (1.4 miles west). For a walk, there’s Pegsdon Hills and Clark's Hill.
Aftercare tips
Good habits help new joints last longer. A few tips:
- Do not paint over fire sealant until it has cured
- Keep general-purpose foam and caulk away from fire-stopping gaps
- Look in service cupboards and ceiling voids from time to time
- Make resealing part of every contractor’s brief
Keep the record we give you with the building’s fire safety documents. It helps whoever checks the building next.
Small gaps around services are simple to deal with while there are only a few. Over time, more work adds more holes and the job gets bigger.
How the job changes by surface
Plasterboard walls
Holes in plasterboard are often cut roughly for services. Gaps that are too big for sealant alone need a different detail.
Door frames
Our work is the joint between frame and wall. Doors, seals and closers are for a door specialist.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Honest limits
We will always be straight with you, so here’s what sealant can’t fix:
- Doors that are not fire doors in the first place
- Walls or floors that weren’t built to resist fire
- Large holes that need a different fire-stopping system
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Pipe & cable gaps
- Plasterboard & masonry
- Flats & HMOs
- Service penetrations
- Door frames
- Linear gaps
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. Most jobs take anything from a few hours to several days, depending on how many gaps there are. For a village or hamlet like Pegsdon, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
- Each gap is measured and its substrate and service noted.
- Unsuitable material such as ordinary foam or silicone is cut out.
- The specified fire-rated sealant goes in over any backing its detail requires.
- Every location is recorded with the product used.
Before we arrive
- Move anything stored near the joints
- Mention any parking rules near the property
- Mention if the joints have been sealed before
How to get a quote
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Read more
Common problems we fix in Pegsdon
If the sealant is too shallow, has the wrong backing or sits on a dusty surface, it is not installed as tested. Rushed fire stopping is common.
The problems people usually mention when they call are:
- New service routes left unsealed after building work
- Old fire sealant that has split or come away
- Gaps around pipes and cables through fire-resisting walls
- Sealant items on a fire risk assessment action list
Rented homes near Hitchin station change hands often, and new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Before you book anyone
- Whether they’re fully insured
- Whether all the old sealant comes out first
- How long the guarantee is
- What product goes in the joint