Hertfordshire · England
Chiswell Green Fire Rated Sealant
Professional fire rated sealant in and around Chiswell Green, with old sealant always removed completely and a one-year guarantee.
- Gaps left after a refit or conversion
- Door frames with gaps between frame and wall
- Linear gaps at the head of walls
Why it’s worth doing now in Chiswell Green
Sealant isn’t the fix for every opening. Big openings, bundles of cables and plastic pipes may need batts, collars or wraps instead. If a gap isn’t suitable for sealant, we’ll tell you. In a smaller place like Chiswell Green, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Leaving a failed joint usually makes the job bigger, not smaller. If you are unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Why us?
- Anti-fungal silicone where joints get wet
- Experience in homes, commercial sites and hotels
- 180+ five-star Google reviews
- 20+ years of sealant experience
Take a look at our cost guide or our reviews.
About our fire rated sealant in Chiswell Green
Later work by other trades often breaks through fire stopping, especially in flats, HMOs, offices and schools. A new cable run or a replaced pipe can leave an open hole behind. We seal them with a product tested for that kind of gap. If you have door frames with gaps between frame and wall and cracked or shrunken fire-rated sealant, we can help.
For a pub, café, guest house or shop in or near Chiswell Green, the washrooms and kitchen need the same attention as a big site.
Your job is guaranteed for a year, as with all our work.
- Location
- Chiswell Green (AL2)
- Region
- Hertfordshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Places near Chiswell Green
More services for Chiswell Green
Workplaces and buildings in Chiswell Green
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 work to the specification you are given, installing the product to its tested details.
Managing a site like Killigrew Primary and Nursery School? Then fire-stopping around service openings should be restored whenever new services go in. For buildings such as St. Stephen's Church, service openings in its walls need the right fire-rated sealant, as in any building.
Chiswell Green is about 2 miles south-west of St Albans, in Hertfordshire. We carry out fire rated sealant for homes and businesses in Chiswell Green and the surrounding area. Across Hertfordshire, we cover 381 places, Chiswell Green among them. We also work in London, about 19 miles from Chiswell Green.
We cover every part of AL2 for fire rated sealant and the streets around it. Whether your property is on Watford Road, Rosedene End and Hammers Gate or anywhere close by, our applicators can take on the job. Chiswell Green is on the B4630, which makes it straightforward to reach with everything needed for fire rated sealant. We also cover the places around Chiswell Green: How Wood (1 mile south-east), Park Street (1 mile east), St Stephens (1 mile north-east), Frogmore (1 mile south-east) and Sopwell (1 mile north-east). Within a short drive, we also cover Watford (5 miles south), Hemel Hempstead (5 miles west), Stevenage (15 miles north-east), Welwyn Garden City (9 miles north-east), Harpenden (6 miles north) and Hoddesdon (15 miles east).
Landmarks near Chiswell Green
In Chiswell Green, that means homes and buildings near Three Hammers Public House, Verulamium Park and Marlborough Science Academy. The closest station to Chiswell Green is Park Street station, roughly 0.8 miles east. A little further out are Hypocaust Museum (1.5 miles north) and Napsbury Hospital (2.1 miles east). Green spaces nearby include Verulamium Lake and Grebe House Wildlife Garden.
What the job involves on each surface
Masonry and concrete
Masonry is dusty and porous, so preparation matters. The gap is cleaned and backed where required.
Linear gaps
A linear joint may need to allow for movement as well as fire. We choose a product and depth that suit the gap and the movement.
FAQs for Chiswell Green
Can you help a landlord with a rental near Park Street station?
Yes. We work for landlords and agents as well as householders. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Chiswell Green?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or drop us an email.
Do you take out the old sealant first?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
How long will you be here?
Typically it takes from a few hours to a few days, depending on the number of gaps and the access. Bigger jobs take longer, and we will say how long yours will take.
Can I use normal mastic around a pipe through a fire wall?
No. It might close the gap, but it isn’t a fire-rated seal. A tested fire-rated product is needed and we can apply it for you.
Are you fully insured?
Yes, we’re fully insured for every job we do.
When something else is needed
In fairness, there are a few things sealant will not fix:
- Sign-off of the building, which sits with building control or your assessor
- Fire risk assessments, which need a qualified assessor
- Big openings where sealant alone isn’t the tested solution
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Flats & HMOs
- Service penetrations
- Pipe & cable gaps
- Linear gaps
- Door frames
- Plasterboard & masonry
Landlord and commercial work in Chiswell Green
If you manage several properties in or around Chiswell Green, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
What affects the cost of fire rated sealant
The price is agreed before any work begins. It’s based on:
- How easy the joints are to reach
- Working hours on commercial sites
- Whether there’s mould to deal with
- The product the joint needs
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
What we need to know
There’s no need for technical detail. Just tell us:
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- The rough size of the job
- What’s wrong with the joints now
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
Signs you need fire rated sealant in Chiswell Green
A lot of fire stopping is out of sight: in ceiling voids, service risers and behind boxing. Out of view, damage sits unnoticed until someone inspects.
The problems people usually mention when they call include:
- Unsealed gaps where pipes and cables go through a wall
- Gaps flagged on a fire risk assessment
- Open gaps behind door architraves
- Cracked or shrunken fire-rated sealant
For landlords with property near Park Street station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Comparing quotes
- Whether they’re fully insured
- When the joint can take water or movement
- Who does the work, and how experienced they are
- Is VAT in the price?
How it 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. A visit to Chiswell Green is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start with the survey or action list, checking the size and surfaces of every gap.
- Anything that isn’t fit for the job comes out, and the gap is 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.
Getting ready for the visit
- Clear the area around the work
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
Getting a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved and give you a clear price.