Hertfordshire · England
Fire Rated Sealant in Welwyn Garden City
We cover Welwyn Garden City for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- New service routes left unsealed after building work
- Cracked or shrunken fire-rated sealant
- Fire stopping disturbed by later work
How to look after the new joints
A little care helps the new joints last. Our advice:
- Flag any open gap you spot round a pipe or cable
- Never patch a fire seal with standard sealant
- Photograph sealed gaps before they’re covered up
- Look in service cupboards and ceiling voids from time to time
Follow the cure time we give you before decorating over the sealant. Some fire-rated sealants can be painted and some cannot.
Leave a fire-stopping gap open and smoke can move through the building much more easily. Sealing it early is a simple step to take.
Fire rated sealant in Welwyn Garden City
Deciding which gaps need fire stopping isn’t our role; that comes from your fire risk assessor, designer or building control. Our part is applying the specified sealant carefully, to the right depth and with the right backing. We work on service penetrations, pipe & cable gaps and flats & HMOs, and the jobs we see most are joints picked up in a fire-stopping survey and open gaps behind door architraves.
For anyone managing a school, care home, pub or office in Welwyn Garden City, the sealant in its washrooms and kitchens, and the fire-rated joints around its pipework, all need looking after. Work can be planned around opening hours where needed.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Welwyn Garden City (AL7, AL8, AL6)
- Region
- Hertfordshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Welwyn Garden City
Also in Welwyn Garden City
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Workplaces and buildings in Welwyn Garden City
Welwyn Garden City is one of England’s garden cities, planned in the early twentieth century. It has workplaces, shops and schools as well as homes, each with washrooms, kitchens and fire-rated joints to keep in order. Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, 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.
For buildings such as Church Of Saint Francis Of Assisi, gaps around pipes and cables are worth checking after any building work there. Letting a property close to Welwyn Garden City station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. If you look after a building such as Peartree Primary School, gaps opened by contractors for new cabling are a common finding in schools and offices.
Welwyn Garden City is in Hertfordshire. Whether you are in the middle of Welwyn Garden City or further out, we cover fire rated sealant for every kind of property. We cover 381 towns and villages across Hertfordshire. Our London page covers work nearby.
All of AL7, AL8 and AL6 is covered for fire rated sealant, from the main roads to the quietest streets. If you need fire rated sealant at a property on Church Road, Station Road and Lynmouth Road or anywhere close by, we can help. You’ll find Welwyn Garden City on the B195 and A1000, so it’s easy for us to get to with everything needed for fire rated sealant. If you’re just outside Welwyn Garden City, we cover Hatfield Hyde (1 mile south), Letty Green (3 miles south-east), West End (3 miles south), Essendon (3 miles south-east) and Staines Green (3 miles east). Further out, we also cover Watford (13 miles south-west), Hemel Hempstead (12 miles west), Stevenage (8 miles north), St Albans (7 miles south-west), Harpenden (7 miles west) and Hitchin (11 miles north). Being one of Hertfordshire’s larger places, Welwyn Garden City has every kind of property, from flats to offices.
Near you in Welwyn Garden City
In Welwyn Garden City, that means homes and buildings near Stanborough Park, Sir Frederic Osborn School and The Bakehouse pub. The nearest railway station is Welwyn Garden City station, roughly 0.5 miles west of the centre. Nearby you will also find The Bunker at Hatfield Police Station (2.9 miles south-west) and Queen Elizabeth II Hospital (1.1 miles south). Green spaces nearby include Lemsford Springs.
How the job changes by surface
Linear gaps
Head-of-wall gaps are often hidden above suspended ceilings. We seal them along their full length.
Flats and HMOs
Converted houses often have gaps around old and new services. We seal the ones on your specification with a tested product.
Welwyn Garden City: your questions answered
Can you help a landlord with a rental near Welwyn Garden City station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is fire rated sealant in Welwyn Garden City guaranteed?
All our work, in Welwyn Garden City and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Where do you work from?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Is intumescent sealant the same as fire-rated sealant?
Fire-rated is the broad term for sealants tested for fire stopping. Intumescent types expand when heated, and they’re one option among several. We use whichever the specification and tested details call for.
What fire rating will the seal have?
Ratings and certification sit with the product’s test evidence and whoever specified the work. We apply the specified product to the manufacturer’s details and giving you a record of where it went.
Is standard sealant good enough for a fire gap?
No. Where a fire-rated seal is needed, it has to be a product tested for that use fitted to the maker’s details.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
How long does fire rated sealant take?
Most jobs take anything from a few hours to several days, depending on how many gaps there are. Your quote will say how long we expect yours to take.
The process
Before we leave, we go over the finished joints with you. The visit itself usually takes a few hours for a handful of gaps, and longer for a whole building, depending on the size of the job. A visit in Welwyn Garden City needs access to the work and a place to park close by. For outside work, let us know about side access, gates and any upper-floor joints.
- 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.
- Fire-rated or intumescent sealant is applied to the right depth and tooled.
- Locations and products are noted so you have them on file.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
- Mention any parking rules near the property
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Advice
What affects the quote in Welwyn Garden City
We don’t publish a price list, because jobs vary so much. The quote depends on:
- Whether old sealant or filler has to be cut out
- The product the joint needs
- Any working-time requirements on site
- The amount of work
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Asking for a quote
Before you ask for a quote, have a think about:
- The problem you’ve noticed
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- Roughly how big the job is
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved.
What we can’t put right
To be straight with you, some problems need a different trade:
- Doors that aren’t fire doors in the first place
- Assessing a building’s fire safety
- Large holes that need a different fire-stopping system
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Where we work in Welwyn Garden City
- Linear gaps
- Flats & HMOs
- Door frames
- Pipe & cable gaps
- Service penetrations
- Plasterboard & masonry
Should I try it myself first?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.