Hertfordshire · England
Fire Rated Sealant in Codicote
Intumescent and fire-rated sealant around gaps, frames and service penetrations in Codicote, with a 12-month guarantee on every job. Ask us for a quote.
- Fire stopping disturbed by later work
- Open gaps behind door architraves
- Open holes round services passing through fire walls
Fire rated sealant in Codicote
Bigger jobs can be worked through in stages, flat by flat or floor by floor. It gives you a list to keep with the building’s fire safety documents. If you have holes left by a change of layout and cracked or shrunken fire-rated sealant, we can help, whatever the surface.
If you run a pub, café, guest house or shop in or near Codicote, the washrooms and kitchen need the same attention as a big site.
A one-year guarantee comes as standard, so you’re covered after we’ve gone.
- Location
- Codicote (SG4)
- Wider area
- Hertfordshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on how many gaps there are. Parking around Codicote is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- 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.
- The fire-rated or intumescent sealant is applied and tooled to the tested detail.
- We record what was done and flag anything that needs a different system.
Getting ready for the visit
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
- Let us know about parking restrictions
Ask for a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.
Advice
When to call us in Codicote
Many open fire-stopping gaps are made after the building is finished. Electricians, plumbers and data installers drill through walls and ceilings and the hole they leave doesn’t always get resealed.
Look out for these signs:
- Open joints along the top of partitions
- Seals cut through by electricians, plumbers or data installers
- Open holes round services passing through fire walls
- Sealant items on a fire risk assessment action list
Schools such as Codicote Church of England Primary School are buildings too, and fire-stopping around service openings should be restored whenever new services go in.
Before booking anyone
- Who does the work, and how experienced they are
- Whether they seal over old material or remove it
- Whether they’re fully insured
- Whether VAT is included
Commercial buildings in Codicote
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, and gaps around services are often picked up there. We work to the specification you’re given, installing the product to its tested details.
Community buildings like Parish Church of St Giles are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking. For landlords with property near Knebworth station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through.
Codicote is about 4 miles north-west of Welwyn Garden City, in Hertfordshire. We carry out fire rated sealant for homes and businesses in Codicote and the surrounding area. 381 places in Hertfordshire are on our list. Our London page covers work nearby.
Every address in SG4 is within our area for fire rated sealant. Fire rated sealant is available to properties on High Street, Baker's Lane and The Green and the roads around them. We also cover Codicote Bottom (1 mile west), Driver's End (1 mile north), Nup End Green (1 mile north-east), Pottersheath (1 mile east) and Ayot St Lawrence (1 mile south-west). Further out, we also cover Watford (15 miles south-west), Hemel Hempstead (12 miles south-west), Stevenage (5 miles north-east), St Albans (8 miles south-west), Welwyn Garden City (4 miles south-east) and Harpenden (5 miles south-west).
What’s near Codicote
In Codicote, that means homes and buildings near The Goat Public House, Monk's Walk School and Danesbury Park, among other places. For rail, the closest station is Knebworth station, roughly 2.4 miles north-east. Nearby you’ll also find Howard Centre (3.6 miles south) and Queen Elizabeth II Hospital (5 miles south-east). Green spaces nearby include Mardley Heath.
Why act early in Codicote
Items left open on a fire risk assessment tend to come back at the next review. Having them sealed and recorded now means you can show the action was taken. Around Codicote, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will explain what it covers.
What you get with us
- Rated 4.9 stars on Google
- Any old sealant cut out fully, not covered over
- A 12-month guarantee on all work
- Fully insured
See how sealant jobs are priced and our reviews.
Towns and villages near Codicote
Also in Codicote
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Landlords, agents and businesses in Codicote
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Problems with the door itself rather than the gap around the frame
- A wall that is not a fire-resisting element to begin with
- Sign-off of the building, which sits with building control or your assessor
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
What we seal
- Pipe & cable gaps
- Flats & HMOs
- Door frames
- Plasterboard & masonry
- Linear gaps
- Service penetrations
What affects the cost of fire rated sealant
The quote reflects the job in front of us. We take into account:
- Any mould that needs treating
- Access and height
- How many rooms, windows or areas are involved
- The size of the job
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- The rough size of the job
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
Need a quote? Please call 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Codicote questions
Can you help a landlord with a rental near Knebworth station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Is Codicote within the area you cover?
Yes, Codicote is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you give us a record of the work?
Yes. Locations and products are written up when we finish. If you need photos or a set layout, ask when you get a quote.
Can I add another job to the visit?
Yes. Just list everything you need and you’ll get one quote.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
How long will you be here?
As a guide, most jobs take a few hours for a handful of gaps, and longer for a whole building. Bigger jobs take longer.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.