Then summer arrives. The sofa beside the west-facing window becomes unusable, the sun heats the walls and ceiling, and the coolest seat in the room becomes the one directly under the air conditioner.

That is not simply a heating or cooling problem. It is a room comfort problem.

Lounge rooms are often the largest and most complicated rooms in the home. They have more glass, more external walls, larger stretches of exposed floor and several openings into hallways, kitchens or dining areas. They may also have fireplaces, sliding doors, high ceilings or stairways quietly carrying warmth away in winter and allowing heat to spread through the home in summer.

But because the lounge is where people naturally gather, it can also be the best place to create a climate safe room: one part of the home that can remain reasonably comfortable during very hot or cold weather without needing to heat or cool the entire house.

That does not mean turning it into a sealed bunker. It means improving the room’s draught proofing, insulation, window performance, shading and zoning so it can hold onto heating and cooling far more effectively.

The result is a lounge that is more comfortable every day—and a safer, more manageable place to retreat to when the weather becomes extreme.

Let’s fix that.

Sit in the place where you normally relax. Do not stand in the middle of the room—your sofa knows far more about the room’s comfort than the thermostat does. 

Place the back of your hand near the window beside the sofa. Does it feel noticeably cold in winter or hot in summer, even when it is closed?

Why it matters:  In winter, your body loses heat towards the cold glass, which can make the area beside the window feel uncomfortable even when the room air is warm. In summer, sunlight passing through the glass heats the floor, walls and furniture inside the room. Those surfaces then hold and release that heat, keeping the room warmer after the direct sun has moved on. 

Look around the edges of any front, back, French or sliding door opening into the lounge room. Can you see daylight? Can you feel air moving around the frame or underneath the door?

Why it matters:  External doors can leak a remarkable amount of air. Warm air escapes in winter, hot air enters in summer, and your heating or cooling system has to keep replacing the comfort being lost.

With the doors and windows closed, watch the curtains. Do they shift, flutter or pull towards the glass?

Why it matters: Moving curtains are often a visible sign of hidden air leakage around the window or door. They may also indicate a strong convection current behind the curtain as warm room air rises, cools against the glass and drops back into the room.

Walk around the perimeter of the room in bare feet or socks. Is the floor noticeably colder near external walls, windows or doors?

Why it matters: Cold edges may point to gaps between floorboards, unsealed skirting boards or missing underfloor insulation. These areas continually draw heat away from the room and can make the whole floor feel uncomfortable.

Does the heater run for a long time without making the entire lounge comfortable? Is there one good seat while the rest of the room remains cold?

Why it matters:  This usually means the room is losing heat too quickly or distributing it badly. More heating may increase the bill without fixing the underlying draughts, cold surfaces or air movement.

Turn the heater off and notice what happens. Does the lounge lose its warmth almost immediately?

Why it matters:  A room that cools quickly is not holding onto the heat you have paid to create. Draughts, poor insulation, exposed glass and open connections to the rest of the home may all be carrying that warmth away.

Does direct afternoon sun hit the windows, floor or furniture? Does the room become much hotter later in the day?

Why it matters:  West-facing summer sun brings intense radiant heat into the room. The glass, floor, walls and furniture absorb that heat and release it for hours, leaving the air conditioner to fight a room full of stored heat.

Is the lounge open to a hallway, kitchen, dining room, stairwell or another large space? Can you feel warm air drifting away from the area you are trying to heat?

Why it matters:  Your system may be trying to heat or cool far more space than you realise. Open hallways and stairwells are particularly good at carrying warm air away—often leaving downstairs cold and upstairs too hot.

Is there an open fireplace or chimney in the room that is no longer being used?

Why it matters: An open chimney is a large permanent hole in the room. Warm air rises straight out in winter, while hot air, smells and debris can move back into the house at other times.

Are sofas, cabinets, curtains or other large pieces of furniture sitting directly in front of a heater, floor vent or air-conditioning outlet? Is a comfortably sleeping cat occupying the warmest air path in the room?

Why it matters:  Heating and cooling need room to circulate. Blocked outlets create hot and cold pockets, reduce the effectiveness of the system and can leave the room uncomfortable even while the equipment is working hard.  More than occasionally underfloor ducting systems have ‘blown a joint’ and your heating is pouring out underneath your home. 

Every “yes” gives you a clue.

The answer is not always more heating or more cooling. First, stop the room from constantly losing the comfort you have already paid to create.

These are not complete solutions, but they can make the room feel better immediately.

When to choose it: Choose this when you can feel moving air around the sides, top or bottom of an external door, see daylight around the frame, or notice that the area near the door is always colder in winter or hotter in summer.  Choose seals designed for the actual door and the size of the gaps.

What it does: A well-sealed external door stops uncontrolled air leaking into and out of the lounge room. The aim is to create a continuous seal around the door while still allowing it to close properly. This helps keep your heating and cooling inside and reduces cold air moving across the floor.  

Do not keep adding layers of foam until the door needs to be shoulder-charged to be shut. A properly sealed door should still behave like a door.

Windows can make a lounge room feel bright and open, but they can also be one of its biggest comfort problems. Cold or hot air can leak around sliding, double-hung, casement and awning windows. Gaps between the window frame and the wall can also affect almost any window type. The right window seal depends on how the window opens and where the air is getting through, so the first job is to identify the window type and test each edge for movement.

When to choose it: Choose this when you feel moving air around the window edges, hear the window rattling, see curtains moving when the window is closed, or find dust and insects entering around the frame. 

What it does: Window seals stop unwanted air leakage around the moving parts and frame. This helps reduce draughts and keeps conditioned air inside the room.  Sealing the window gaps stops unwanted air leakage. It does not insulate the glass itself, so a comfortable lounge may need both effective window seals and a separate solution for heat moving through the glass.

When to choose it: Choose this when the lounge feels uncomfortable near the windows, the curtains finish well above the floor, there are large gaps around the edges, or warm air disappears behind the curtains in winter.

What it does: Well-fitted window coverings help reduce the movement of room air against cold glass in winter. They also create another barrier between the room and window surfaces warmed by summer sun.

Add full-length curtains, reduce gaps at the sides and install invisible pelmets above the curtain track. A pelmet is particularly useful because it stops warm room air dropping behind the curtain, cooling against the glass and spilling back into the room. 

Check the Ultimate Guide to Windows Coverings - this is everything you ever wanted to know about window coverings - and more! 

For direct summer sun, especially on west- and north-facing windows, external shading is generally more effective because it stops the sunlight before it reaches the glass.

When to choose it: Choose this when the lounge has an open chimney or unused fireplace and you can feel cold air near it, hear wind through the flue or notice smell, debris, birds or insects entering the room.

What it does: A  chimney draught stopper closes one of the largest potential air leaks in an older lounge room. It helps stop warm air rising out of the house in winter and unwanted outdoor air moving back down the chimney.

This is often one of the quickest and most noticeable comfort improvements available in a room with an unused fireplace.  Always remove the chimney draught stopper before lighting a fire.

When to choose it: Choose this when you have old floor heating outlets, unused wall vents, gaps around pipes or cables, or openings left behind by removed equipment.

What it does: Correctly sealing redundant openings stops air leaking into parts of the building that you are not trying to heat or cool. It can also reduce dust, smells and insects entering from wall cavities or beneath the floor.

First determine what the opening does and whether it is still required. Then use the correct method to seal or improve it. Never block a vent required for the safe operation of a gas appliance. Check our guide to vents for everything you need to know before sealing one.  Check here for everything you need to know about vents. 

When to choose it: Choose this when the lounge opens into a hallway, stairwell, kitchen, dining room or unused section of the house, and your heating or cooling seems to disappear into those spaces.

What it does: Zoning reduces the amount of space your heater or air conditioner is being asked to manage. This can help the lounge reach a comfortable temperature sooner and hold it for longer.

Close and draught-proof internal doors where possible. Where there is no door, a well-fitted curtain may help slow the movement of air. Even a modest reduction in the area being conditioned can make the lounge easier and less expensive to heat or cool.