Greater London · England
Lewisham Fire Rated Sealant
Fire rated sealant in Lewisham from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps around pipes and cables through fire-resisting walls
- Damaged fire sealant left by other trades
- Gaps left after a refit or conversion
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Fire doors that need new seals, closers or hardware
- Big openings where sealant alone is not the tested solution
- Deciding what fire stopping a building needs
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
What we seal
- Linear gaps
- Flats & HMOs
- Pipe & cable gaps
- Service penetrations
- Door frames
- Plasterboard & masonry
Fire rated sealant in Lewisham, done properly
Bigger jobs can be worked through in stages, flat by flat or floor by floor, with each location and product recorded. That record is useful for your files and for whoever looks at the building next. We work on service penetrations, pipe & cable gaps and flats & HMOs, and people most often call us about gaps where walls meet ceilings or slabs and unsealed gaps where pipes and cables go through a wall.
London’s offices, shops, hotels, student accommodation and blocks of flats all have joints to look after, whether that is washroom resealing or fire-rated sealant around service openings. Out-of-hours working can be arranged where a building in Lewisham cannot close.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Lewisham (SE13, SE8, SE6)
- Wider area
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Lewisham
Also in Lewisham
Lewisham: your questions answered
Is parking a problem for a job in Lewisham?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you take on hotel work around Lewisham?
Yes, hospitality work, including hotels, is part of what we do. Work can be planned room by room, and out-of-hours working can be arranged.
Can I use normal mastic around a pipe through a fire wall?
No. Standard sealants aren’t made or tested to stop fire. We cut it out and reseal with a fire-rated product.
Do you take out the old sealant first?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
How long does fire rated sealant take?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on how many gaps there are. We’ll give you a better idea when we quote.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
What’s the difference between intumescent and fire-rated sealant?
Fire-rated is the broad term for sealants tested for fire stopping. Intumescent ones swell in heat, and they’re one of the options. We use whichever the specification and tested details call for.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
How the visit works
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. The work normally takes anything from a few hours to several days, depending on how many gaps there are. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Lewisham. It helps if you can point us to a visitor permit or a bay close to the door.
- Access to each area is agreed so the work can run in order.
- We take out any damaged or unsuitable sealant.
- Gaps are cleaned of dust and loose material.
- We apply and tool the sealant to the product’s tested detail.
- We record what was done and flag anything that needs a different system.
Before we arrive
- Try not to wet indoor joints just before the visit
- Clear the area around the work
- Tell us if parking is tricky
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.
Read more
What the job involves on each surface
Linear gaps
Long, narrow gaps appear where walls meet slabs and ceilings. They’re sealed with a fire-rated sealant over backing where the detail calls for it.
Plasterboard walls
In plasterboard walls, the condition of the board edge matters. Loose material is removed so the sealant has a firm edge.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Signs you need fire rated sealant in Lewisham
In some buildings the gap was filled with the wrong thing in the first place: general-purpose foam, everyday silicone or caulk in a place that needed a tested fire seal. It looks sealed, but it isn’t fire-rated.
Look out for any of the following:
- Gaps filled with a product that isn’t fire-rated
- New service routes left unsealed after building work
- Linear gaps at the head of walls
- Open gaps behind door architraves
Rented homes near Lewisham station change hands often, and any gap left by new services in shared walls should be closed with a fire-rated product.
Comparing quotes
- The length of the guarantee
- How much experience the applicator has
- Whether VAT is included
- Are they insured?
Leave it or put it right?
An open gap in a fire-resisting wall is a route for smoke and fire. A proper seal lets the wall do its job again, and the work involved is often modest. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Lewisham.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why us?
- We are fully insured
- Tidy, careful work
- An ARBOMaster approved applicator
- More than 20 years in sealant work
See what affects the cost and customer reviews.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Store the list of sealed gaps with your building paperwork
- Look in service cupboards and ceiling voids from time to time
- Plan fire stopping into any work that goes through walls or floors
- Keep pictures of seals that will be hidden
Look at the sealed gaps as part of your routine walk-rounds. Look for cracks, gaps or sealant that has been cut or pulled out and get them seen to.
Any job that breaks through a wall or ceiling should include resealing. Doing it at the time avoids leaving gaps behind.
Commercial buildings in Lewisham
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. Commercial buildings in London often have strict access rules and limited loading, and out-of-hours working is possible to arrange.
Lewisham is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you look after a church, hall or community building such as St Stephen's Church, older buildings that have had new heating or wiring often have service gaps worth checking.
Lewisham is about 3 miles west of Eltham, in Greater London. For fire rated sealant in and around Lewisham, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We cover Greater London from our Crawley base, Lewisham included. Lewisham is one of 764 towns and villages in Greater London where we work for fire rated sealant.
Work in SE13, SE8 and SE6 works the same way as everywhere else we cover. You’ll find streets such as Station Road, Lewisham High Street and Lewis Grove. You will find Lewisham on the B220, which makes it straightforward to reach with everything needed for fire rated sealant. Neighbouring places we cover for fire rated sealant include Ladywell (1 mile south-west), St Johns (1 mile north-west), Hither Green (1 mile south-east), Blackheath (1 mile north-east) and Lee (1 mile south-east). Larger places within reach include London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (9 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
Near you in Lewisham
Around Lewisham, our work takes us to homes and buildings near St Joseph's Academy, Ladywell Fields and The Watch House, among other places. Lewisham has its own railway station: Lewisham station. Other landmarks nearby include Greenwich Castle (1.2 miles north) and Fan Museum (1.2 miles north). Green spaces nearby include Knight's Hill and Brookmill Road Local Nature Reserve.