Fire door surveys
We can survey existing doors across a property or portfolio, grading each as compliant, repairable or requiring replacement, with a photographic report.
Kingston upon Thames, London KT2 6QW [email protected]
Fire door installation in Harrow
Fire door installation in Harrow, London
Lian Construction supplies and installs FD30 and FD60 fire doors across London for landlords, letting agents and block managers, fitted to the gap tolerances, seals and closer settings that make a certified fire door actually work as tested. We handle single door replacements for individual flats and full programmes across blocks and HMO portfolios, working around occupied properties and reporting back with photographic evidence for fire safety files and licensing inspections.
Harrow overview
Fire door installation in Harrow
Outer North West London borough with suburban family homes and consistent demand for roof and general repair work. Harrow falls well within the West London ground Lian Construction covers on a regular basis. For fire door installation work in Harrow, that local knowledge means fewer surprises once work is on site and a team that already understands the borough's typical property stock.
Harrow sits in outer north west London, and its housing stock reflects that suburban character. Much of the borough was built up during the interwar period, when Metroland-style expansion brought semi-detached houses, bay-fronted terraces and some detached family homes along tree-lined streets. This 1920s-1930s stock typically features solid brick construction, pitched tile roofs, and generous gardens, which is typical of outer London suburbs that grew around tube and rail expansion. Alongside this there are pockets of older Victorian and Edwardian terraces nearer established centres, plus post-war infill and more recent low-rise development filling gaps on larger plots. Roofs on the interwar semis are now approaching or past their original expected lifespan in a lot of cases, in line with the pattern seen across similar outer London suburbs of that era. Clay or concrete tiles laid in the 1920s and 1930s are often due some attention, whether that's re-roofing, repointing ridges, or dealing with slipped tiles and blocked valley gutters. General wear on render, guttering, fascias and roofline timber is also common simply because a lot of this building fabric is now close to a century old.
Harrow's suburban family housing generates steady, ongoing demand for maintenance and repair work rather than large speculative building projects. Owner-occupiers in semi-detached and detached homes tend to invest in upkeep, roof repairs, guttering, extensions and general refurbishment, as part of looking after a long-term family home rather than a quick flip. That creates a fairly consistent stream of repair and small-to-medium refurbishment jobs across the borough, rather than the sharper boom-bust patterns seen in areas driven more by flat conversions or short lets. In practice this means it's usually worth budgeting for routine roof and exterior maintenance rather than waiting for a problem to become urgent, since ageing interwar roofs and rendering tend to degrade gradually rather than fail all at once. For landlords with rental stock in the borough, staying on top of general repairs is often more cost-effective than reactive fixes, particularly where several properties share similar age and construction. Because demand tends to be steady rather than driven by seasonal spikes, homeowners generally have more time to plan work properly and compare quotes, though it's still sensible to book roofing work ahead of autumn and winter when contractors tend to get busier.
What goes into a certified fire doorset
A certified fire doorset is not just a heavier door. FD30 and FD60 leaves have a dense mineral or timber composite core, usually chipboard or particleboard bonded with additives that char and insulate rather than burn through, faced with veneer, laminate or a paint-grade skin. Around the door edge and matching frame rebate, a continuous intumescent strip, usually graphite-based, sits in a groove and expands under heat to seal the gap and stop fire and smoke passing through, working alongside a cold smoke seal, either a brush pile or a fin, that blocks smoke at ambient temperature before the intumescent activates. The frame has to be matched to the leaf as tested, not just any timber frame of the right thickness. Ironmongery is part of the tested assembly too. FD60 leaves typically weigh 40 to 50kg and need at least three, often four, hinges fitted with intumescent hinge pads, and any lock, latch or vision panel has to be within the scope of what the doorset was certified with. A colour-coded certification plug or label on the top edge of the door references the test or assessment it was built to, which is what an inspector or fire risk assessor is looking for when checking a door on site.
Signs to look for
Do you need fire door installation in Harrow?
- A house is being converted into flats or an HMO, and bedroom, kitchen or escape route doors need fire-rated doorsets fitted.
- Communal entrance or stairwell doors in the block look original, unlabelled, or clearly predate any fire door specification.
- The door doesn't close fully onto the latch by itself, or it catches and sticks on the frame or floor when swinging shut.
- Gaps around the door edge look wider than a couple of millimetres, or daylight is visible around the frame when it's closed.
How the work is handled in Harrow
- Step 1Confirm the required door schedule
- Step 2Supply certified doorsets
- Step 3Install to correct tolerances
- Step 4Gauge, photograph and sign off each door
Questions
Fire door installation questions in Harrow
How quickly can Lian start fire door installation work in Harrow?
Harrow is part of our regular West London coverage, so once we've surveyed the property we can usually confirm a start date quickly. Send the address and scope and we'll arrange the next step.
Do you cover all of Harrow?
Yes. Harrow falls within the area Lian Construction serves across Greater London.
What paperwork should we get once fire doors have been fitted?
You should end up with a clear paper trail: the doorset manufacturer's test or assessment evidence for that specific configuration, and a fitting record confirming who installed each door, when, and that gaps, seals and the closer were checked and signed off. On block and portfolio jobs we also provide a photographic record of each door as fitted, which is useful evidence to sit in the responsible person's fire safety file and to show at licensing inspections or when a fire risk assessor asks for it. Keeping this with the building's other fire safety records, rather than with whoever project-managed the works, means it's still there years later.
Can you fit glazed vision panels, letterplates or door numerals into a fire door without affecting its rating?
Yes, but only using components that fall within the doorset's tested scope. Vision panels use fire-rated glass, either Georgian wired or a clear pyrolytic type, set in matching intumescent beading rather than standard bead. Letterplates, door numerals and spy holes are fitted with fire-rated liners or intumescent sleeves so the seal around the cut-out is maintained. Adding ironmongery that wasn't part of the tested assembly, even something as simple as the wrong hinge, can technically invalidate the door's certification, so we specify and source components to match what the doorset manufacturer allows rather than using whatever's convenient.
Can tenants stay in the property while the fire doors are fitted?
In most cases, yes. A single door usually takes a matter of hours, so a tenant can generally stay in the flat and simply keep clear of the room being worked on at the time. For a full HMO or block programme covering several doors, we sequence the work room by room so only one door is out of action at once rather than leaving the whole property without doors overnight. The main thing to plan for is access, since the tenancy agreement's notice period needs to be given before we can enter, and someone needs to be able to let us in on the day.
What happens to the old doors once they've been removed?
Old doors and frames are removed and taken off site as general construction waste, either with us directly or via a skip on larger programmes. They're not usually salvageable for reuse elsewhere in the property, since an old timber door that wasn't fire rated has no certification value even if the timber itself looks sound. If a landlord wants to keep a period front door for its character rather than dispose of it, that's worth flagging before work starts so it can be stored rather than skipped, though it obviously can't then be reused as the fire-rated replacement.
Talk to Lian Construction about Harrow
Send the site address in Harrow, photos if available, and the fire door installation work you need. We can review the scope and arrange the next step.