Thermal Mass

Explore our collection of Thermal Mass
featured on Lunchbox Architect.

Keeping your home warmer in winter and cooler in summer, thermal mass, like water, concrete and brick, (when used in conjunction with passive solar design) is a secret weapon against thermal discomfort (and expensive heating and cooling bills).

Have you ever stepped on or touched concrete after the sun has set to find it's still toasty warm? That's because concrete is great thermal mass — it absorbs and then holds heat for a long time. Materials with high thermal mass (like concrete, brick and even water) are like a thermal bank account. When times are good and the sun is shining they'll absorb the heat energy. Then, when that heat disappears (when it's cloudy or the sun has set) they'll slowly release that heat back into the atmosphere. When used in a home, this helps to moderate the temperature between the day and night.

The reverse is also true, if you cool down concrete or any other material high in thermal mass, it will stay cool for a long time, radiating that 'coolth' back into atmosphere.

When used correctly, thermal mass is a great way to store the sun's energy to keep the house warmer at night or when it clouds over. In summer (or tropical climates), the thermal mass can be used to keep the home cooler.

Bikes, Bunnies, and Brilliance: A Green Dream Home

Where bike storage isn’t an afterthought but a design-defining feature.

Rammed Earth Walls and Passive Design Makes Every Season a Breeze

Forget the front door — this beautiful rammed earth home greets you with a friendly courtyard welcome.

This Victorian Villa’s secret? A contemporary, sustainable twist (literally)

Think Victorian homes are dark and outdated? Think again! Bryant Alsop’s addition is all about light, space, and sustainability.

Why this eco-friendly home is more than just a pretty face

A home that blends into its suburban surroundings while quietly championing passive solar design and low-carbon construction...

A Stunning New Family Home That Respects and Remembers Its Roots

A new build that honours its humble but much loved predecessor while embracing modern sustainability and style…

Clever Design Under One Roof: Maximising Space in Urban Duplex Living

How Kreis Grennan Architecture used smart design to create two spacious homes on a compact site...

A 90s renovation had made one big mistake…

Now this home enjoys a modern upgrade, reconnecting the kitchen to the backyard and adding eco-friendly touches...

Sustainable renovation: From dark bungalow to light-filled haven

This renovation isn't just an update—it's a tribute to the original design, reimagined for today.

Embracing the Coastal Lifestyle: River of Life, Curl Curl

Soak in the fluid lines and light and airy interiors of this modern coastal home in Sydney's Northern Beaches...

A Modern Australian Home Nestles Into Stunning Natural Landscape

A combination of bricks, timber, corrugated iron and translucent sheeting help this home complement its semi-rural landscape.

A Little Bit of Zinc Hints At What's Happening Behind Red Brick House

Clad in zinc, this simple rear addition creates a light-filled, low-fuss extension for a young family to grow.

From Disused Inner-City Car Park to a Compact Family Home

From the street this modern take on the other single storey cottage in the neighbourhood. But things get interesting quickly...

Australian Retreat Designed to Encourage a Laid-back Lifestyle

Waitpinga Retreat designed as a casual getaway immersed in the natural beauty of nature looks and feels very Australian.

Think of the Polar Bears! This Home Updated for Energy Efficiency...

Rising costs and melting ice caps. Why not use your renovation as an opportunity to improve your home's environmental credentials as well.

Renovations Reuses Salvaged Materials from the Demolition Works

An extension to a double fronted Californian bungalow reuses salvaged materials from the demolition works in an extensive renovation.

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Going Off the Grid: These 5 Homes Will Convince You to Go Off-Grid

These homes are off the grid. They produce power, collect rainwater and treat their own waste - saving money and the planet at once.

Fine Detailing Takes Rustic, Shed-Like Materials to the Next Level...

This modern farmhouse combines a manager's residence, stable and self contained two-bedroom apartment in finely detailed modern sheds.

A Home Inspired by the Feelings of Camping Under a Simple Tarpaulin

In a natural clearing of bushland, this home with simple detailing and an earthy palette captures the spirit and joy of camping.

A Galvanised Nugget for a Gold Prospector and His Family

On a windy and exposed site, nestled behind a hill, sits a metal clad nugget; a home for a gold prospector and his family...

Beach Avenue House: Spacious Family Home Managed to Fit on Tiny Site

On an extremely small parcel of land Beach Avenue House is designed more like a finely crafted joinery unit than a typical home.

Wall and Wall House Uses Rammed Limestone for Style and Substance

Rammed Limestone is the perfect material for Wall and Wall House — locally sourced, beautiful texture and natural colour and high thermal mass.

Modern 'Wool Shed' Pays Homage to Iconic Australian Design

This modern farmhouse in Tonimbuk allows the owner to 'live in the environment' thanks to large glass sliding doors.

A Clever Extension Dramatically Improves 1920s-Era Neutral Bay House

Carefully curated views help Neutral Bay House to feel brighter, connect to the garden and defy its tightly confined urban site.

Constable House Staged Renovation Takes 14 Years, But Worth the Wait

A 1960s Architect-designed home undergoes 21st Century transformation into a gracious new house fit for modern living.

Mona Vale House is a Test Bed for Sustainable Ideas

Thanks to an owner with an interest in sustainable building, Mona Vale House incorporates passive and active sustainability features.

Concrete Has Never Looked Sexier than at Glebe House

Off form concrete draws on the solidity of an original masonry structure whilst introducing a new materiality at this home in Glebe.

Mountain Retreat: A Subtle Insertion in the Alpine Landscape

This superb Mountain Retreat utilises local stone to minimise impact to the external environment, but maximise the internal environment.

Queens Park House: Flexible Spaces Designed to Change As Family Grows

Queens Park House designed to create a series of spaces in the old and new house which are flexible over time.

Thornbury House: Don't Adjust Your Glasses, This House is Intentionally Crooked

Thornbury House might appear haphazardly crooked, but the angled facade doubles as a sunshade. This solar passive home is functional and visually appealing.

Pirates Bay House: A Holiday House for Slow Living

Like the slow food movement, Pirates Bay House is a reaction against our hectic lives. It's a home for slow living on Australia's Mornington Peninsula.

Model House: Home for a Set Designer Puts on a Show

At first glance it's a typical Victorian-era worker's cottage. Only on closer inspection you realize there's something unusual going on behind that facade...

Mount Ninderry House: Low Budget Sustainable House in Picturesque Surrounds

Mount Ninderry House is a sustainable house that takes full advantage of its stunning natural setting without the extra cost. And check out that pool!

Snowy Mountains House: Living Off The Grid Never Looked This Good

Snowy Mountains House is designed for living off the grid in style. The home works with nature to resist extreme winds, collect rainwater and shed snow.

Elm and Willow House: A Home That Blurs Indoors and Outdoors

Elm and Willow House's walls seem to vanish. The living area is neither indoor, nor outdoor space -- the entire yard becomes a part of the house.

Bridge House Touches the Earth Lightly -- Literally and Figuratively

Bridge House takes full advantage of a naturally stunning site, straddling a creek bed and touching the earth lightly environmentally and physically.

The Shed House Will Make You Think Twice About Old Buildings

The location was right. But it would take a lot of imagination and a leap of faith to transform this dilapidated shed into a home...

Florence Street House: A Compact First Home in a Suburban Backyard

Tucked away in a subdivided backyard in Melbourne's Inner North, Nest Architects created a delightfully compact two-bedroom home with a beautiful sunny garden.

Leura Lane House: Modular Energy Efficient Home for Rural Properties

The 8.2-Star Energy Rated Leura Lane House is an impressive 2-bedroom prototype for energy efficient housing perfect for rural sites.

House 6: A Tiny Pavilion's Enormous Impact to a Sydney Home

Despite only adding six square meters to this home, Welsh and Major's reconfiguration and tiny pavilion have made a dramatic difference.

Redhead Alterations: 1970s Home Transformed for Energy Efficiency

A project home from the 1970s with poor solar orientation is reconfigured and realigned. Now it catches the sun for energy efficiency.

Forever House: A New Pavilion under the Eaves of a Suburban Home

A sustainable, flexible and contemporary living space grows out of an existing home. It's reverent and cheeky, radical and conservative.

Aireys Inlet House: Home Away From Home Prioritizes Connection to Nature

Aireys Inlet House -- like all good second homes -- creates connection to nature in contrast to the clients' busy city lives.

Cranky Corner House: A Comfortable and Sustainable Place to Retire

Cranky Corner doesn't sound like the ideal retirement home, but this farmhouse in the Hunter Valley is a comfortable and sustainable place to retire.

Fairfield Hacienda: Finally a Front Yard You Can Actually Use

Fairfield Hacienda offers an alternative to the often wasted front yard. MRTN Architects have created a sunny, private courtyard at the front of the house.

Montville Residence: Precast Concrete Rainwater Tanks Keep the Cool

Dramatic topography, bush setting and diverse climatic conditions were the driving forces in this environmentally friendly design.

Ilma Grove House: A Heritage Home Looks Forward to a Sustainable Future

Ilma Grove is an extension to a heritage home in Northcote, Victoria. The extension provides more space and guarantees a sustainable lifestyle.

A Multi-Generational Holiday Home Balances Connectivity and Solace

In an effort to find more space for a growing and ageing family, Andrew Maynard Architects created a home that has shared space and more private zones.

Introspective Modern Beach House With No Access to Sea Views

You can't see the sea from this modern beach house. Undeterred by the lack of view, it faces a sheltered internal courtyard instead.

Prefab-ulous Passive Solar Home Proves a De-light to Live In

A prefab home designed around passive solar design principles is warm, comfortable, energy efficient and looks prefab-ulous.

A Tiny 25 Square Meter Extension Attaches Itself Like a Barnacle

A tiny barnacle-like extension creates a sense of camping or sleeping in the berth of a yacht, but with framed views of the landscape beyond.

Somers Courtyard House: Low Maintenance Off-Grid Home for Entertainers

Somers Courtyard House is a low maintenance home to accommodate an expanding family with regular guests. The best part? It's completely off-grid!

Tanderra House Pushes the Conventional Aussie Verandah to New Heights

Sean Godsell Architects explore the traditional verandah to create a stunning beach home sheltered from the extremes of coastal life.

House C3 Balances Modernity with its 19th Century Neighbours

House C3 sits comfortably in its neighbourhood of 19th century workers' cottages neither shouting its modernity nor mimicking the neighbours.

How Can You Build a Great Holiday House at an Affordable Price?

Pekapeka Holiday House explores how to build a holiday house of with strong architectural character at an affordable price.

A Modern Extension of Thin Steel, Glass, and Concrete Adorns Heritage Home

An extension made from delicate steel and expansive glass feels like a precious jewel has been hung on the original heritage home.

A Prefab Detached Studio in Hawthorn Adds Limitless Flexibility

Parents' retreat, teen hideaway, granny flat or rental earner — the function of this self contained extension can change over time.

Sawmill House Rethinks Waste Materials to Create Raw, Rustic Beauty

Befitting a regionally based sculptor, Sawmill House is a hand crafted upgrade from his existing rather rustic bohemian abode.

Woollahra House Makes the Best of a Compact Urban Site

A new house set in a compact urban site, Woollahra House has a relaxed yet rich garden landscape of indoor and outdoor rooms.

Wirra Willa Pavilion: Minimal Glass-Walled Guest Home Set in the Landscape

A Miesian inspired glass pavilion in a rural landscape setting not dissimilar to that portrayed in a Claude Monet painting…

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