In most Indian kitchens the three or four units around the hob and chimney wear out at a completely different rate from everything else, and they are usually specified identically to the cabinet at the far end of the run. That mismatch between what a position demands and what was fitted there is the whole story of this particular failure, and it is almost entirely preventable at specification stage.
What Does Cooking Heat Actually Do to a Cabinet?
Four things, progressing roughly in this order over years rather than months.
| Stage | What you see | What is happening |
|---|---|---|
| 1 | Slight colour change, yellowing on light finishes | The finish is ageing faster under thermal cycling |
| 2 | Surface feels tacky or slightly soft when warm | Adhesive and finish softening at the top of each cycle |
| 3 | Laminate or membrane lifting at a top or inner edge | Bond fatigue after hundreds of heat cycles |
| 4 | Visible blistering, or a shutter that has bowed | One face has taken heat the other has not |
Stage three is the one people notice, and by then the cause has been operating for years. The edge that lifts first is almost always the one nearest the heat source, which is diagnostically useful: lifting at the top inner edge of a hob-side door is heat, while lifting at the bottom edge is more likely moisture.
Is This Heat Damage or Just Grease Build-Up?
They occur together in the same positions, which is why they get confused, but they need different responses and one of them is genuinely reversible.
Clean a small patch with a degreaser appropriate to the finish. Grease build-up lifts off and leaves the surface looking close to the rest of the run. Heat damage does not change, because the finish itself has altered rather than something sitting on top of it.
Two further distinctions help. Grease is usually worse on horizontal and upward-facing surfaces and at arm height, since it settles out of the air and gets touched. Heat damage concentrates on the surfaces facing the hob and immediately above it, and it is sharply localised: the door next to the hob is affected and the one after it often is not.
A grease film that has been there for years is harder to shift than a recent one and may need repeated treatment, but it remains a cleaning job rather than a replacement. People replace cabinets over heavy grease that would have cleaned up, which is worth avoiding before committing to anything.
Why Does the Cabinet Above the Chimney Fail?
Because it sits directly in the path of whatever the chimney does not capture, and because the space behind it is usually a warm, greasy, unventilated void that nobody ever opens.
Three distinct things act on that unit.
- Rising heat and steam that the chimney has not drawn in, concentrated on the underside and lower edges of the cabinet
- Grease-laden air escaping around the chimney body, which deposits on the inside of the cabinet as well as the outside
- Heat from the chimney motor itself in some installations, which warms the enclosure continuously while it runs
The practical consequence is that the damage is often worse inside the cabinet than on the visible face, so the unit looks acceptable from the kitchen and is in poor condition when you open it. If you have not opened the cabinet above the chimney in a year, it is worth doing before any decisions get made about this part of the kitchen.
Note also that a chimney that is not drawing properly makes all of this substantially worse. Ducting, motor condition and filter cleaning are appliance matters rather than woodwork ones, and if the chimney is underperforming that is worth resolving first, because new cabinets in the same conditions will go the same way.
What Is Recoverable in This Part of the Kitchen?
Often more than it looks, because heat damage is concentrated on surfaces rather than distributed through the structure. Heat does not generally destroy a carcass the way water does.
| Component | Usual outcome |
|---|---|
| Carcass side and back panels | Usually sound. Inspect, expect to keep |
| Shutters nearest the hob | Usually replace |
| Cabinet above the chimney, interior | Clean, or replace that one carcass |
| Hinges in the hot positions | Replace. Heat cycling shortens their life |
| Internals and baskets | Clean and keep |
| Countertop around the hob | Inspect for heat cracking at the cutout corners |
This is why heat damage around a hob is usually a shutter and hardware job rather than a kitchen job. The boxes behind the damaged doors are generally still carrying load perfectly well, which is the thing to establish before anyone proposes replacing the run. The kitchen carcass check sets out how.
What Detailing Stops It Repeating?
Five things, and none of them involves a different kitchen layout. They are all specification and detail decisions in the hot zone.
- Treat the hob zone as a separate specification. The two or three units around the hob should not be specified identically to the rest of the kitchen. This single decision prevents most of what this page describes
- A heat barrier or shield on the cabinet surfaces facing the hob, and on the underside of any unit above it
- A more heat-stable finish on the hob-side shutters, accepting a visible difference or choosing a scheme where the difference reads as deliberate
- Balanced finish on both faces of those shutters, because heat on one face and not the other is what bows a door. Warped kitchen shutters covers that mechanism
- Ventilation in the chimney enclosure, so warm greasy air is not held permanently against board
There is also a clearance question, which is an appliance specification matter rather than ours: hobs and chimneys have minimum clearances to adjacent combustible surfaces, and a cabinet fitted closer than the appliance maker allows will suffer regardless of finish. That is worth checking against the appliance documentation rather than assumed.
Does Anything in Daily Use Make a Difference?
Yes, and it is more significant than most people expect, because the damage is cumulative over hundreds of cycles rather than caused by any single event.
- Run the chimney for a few minutes after cooking ends, which clears the residual steam and grease that would otherwise settle on the cabinets
- Use the back burners for long cooking where the layout allows, since they are further from shutter faces
- Wipe the hob-side doors sooner rather than later. Fresh grease comes off easily and a film that has baked through a few heat cycles does not
- Clean or change chimney filters on schedule, because a blocked filter means a chimney that is not drawing, which pushes everything onto the woodwork
- Keep pan handles turned in so steam is not directed at a shutter edge
None of this rescues a damaged door. All of it meaningfully extends the life of a new one, which matters because these are the doors you would otherwise be replacing again.
Why Is This Pronounced in Indian Kitchens?
Because of how the cooking actually works rather than anything about the construction. Indian cooking involves sustained high heat, frequent tempering and frying that puts oil into the air, pressure cookers releasing steam at height, and long cooking sessions rather than short ones. The thermal and grease load on the cabinets around a hob is simply greater than the load those cabinets are often specified for.
Two Bengaluru-specific factors add to it. Many apartment kitchens are compact, which puts the shutters closer to the hob than a larger kitchen would, so the same cooking delivers more heat to the woodwork. And utility areas open to the weather mean the adjacent run is already dealing with humidity, so a hob-side cabinet on that side of the kitchen is taking heat and damp together.
The reasonable conclusion is not that kitchens should be built differently in India. It is that the hob zone deserves its own specification line, which costs very little and is almost never offered. When you are getting a quotation, ask explicitly what is different about the units around the hob. If the answer is nothing, that is the answer to the question this page is about.
Frequently Asked Questions
Why are the cabinets next to my hob damaged when the rest are fine?
Because they take a daily thermal cycle no other cabinet sees, usually while being specified identically to the cabinet at the far end of the run. Adhesive and finish soften at the top of each cycle, and after hundreds of cycles the bond fatigues and an edge lifts.
How do I tell heat damage from grease build-up?
Clean a small patch with a degreaser suited to the finish. Grease lifts off and leaves the surface looking close to the rest of the run. Heat damage does not change, because the finish itself has altered rather than something sitting on top of it.
Can heavy grease build-up be cleaned off?
Usually yes, though a film that has been there for years and baked through heat cycles needs repeated treatment. People replace cabinets over grease that would have cleaned up, so it is worth testing a patch before committing to anything.
Why is the cabinet above my chimney in bad condition inside?
It sits in the path of whatever the chimney does not capture, and the space behind it is usually a warm greasy unventilated void. Grease-laden air escaping around the chimney body deposits inside the cabinet, so the damage is often worse inside than on the visible face.
Does a poorly drawing chimney make this worse?
Substantially. A blocked filter or weak extraction pushes heat, steam and grease onto the woodwork instead of out of the duct. Ducting, motor and filters are appliance matters rather than woodwork ones, and an underperforming chimney is worth resolving first, since new cabinets in the same conditions go the same way.
Does heat damage mean the carcass has to be replaced?
Usually not. Heat concentrates on surfaces rather than distributing through the structure, so it does not destroy a carcass the way water does. The boxes behind damaged doors are generally still carrying load, which makes this a shutter and hardware job rather than a kitchen job.
What should be specified differently around the hob?
Treat the hob zone as a separate specification rather than identical to the rest of the kitchen. A heat barrier on surfaces facing the hob and under any unit above it, a more heat-stable finish on those shutters, balanced finish on both faces so the door does not bow, and ventilation in the chimney enclosure.
Do my cooking habits actually matter?
More than most people expect, because the damage is cumulative over hundreds of cycles. Running the chimney for a few minutes after cooking, using back burners for long cooking, wiping hob-side doors before grease bakes on, and keeping filters clean all extend the life of a new door meaningfully.
Why is this worse in Indian kitchens?
Sustained high heat, frequent tempering and frying that puts oil into the air, pressure cookers releasing steam at height, and long cooking sessions. The thermal and grease load around a hob is greater than what those cabinets are commonly specified for, and compact apartment kitchens put the shutters closer to the heat.
Key Takeaways
- The hob zone wears out at a different rate and is usually specified identically.
- Lifting at the top inner edge is heat. Lifting at the bottom edge is moisture.
- Test a patch with degreaser. Grease cleans off, heat damage does not change.
- The cabinet above the chimney is often worse inside than on the visible face.
- A chimney that is not drawing pushes everything onto the woodwork.
- Heat damages surfaces rather than structure, so the carcass usually survives.
- Ask what is specified differently around the hob. If nothing, that is the problem.
- Running the chimney after cooking and wiping doors early genuinely extends life.
Heat damage is usually a shutter and hardware job, not a kitchen job. Confirm the boxes with the kitchen carcass check, or see kitchen renovation in Bangalore.