When “SUSTAINABLE” Stopped meaning anything.

Perhaps the greenest building material is the one you never use.

THE SHELTER JOURNAL | NO. 006

There was a time when the word sustainable asked a difficult question.

Can we continue doing this?

Can we continue extracting resources at this rate?

Can we continue consuming this much energy?

Can we continue throwing materials away?

Can we continue building as though the resources beneath our feet are unlimited?

They were uncomfortable questions.

Then something happened.

Sustainability became a market.

And markets need products.

Sustainable concrete.

Sustainable timber.

Sustainable steel.

Sustainable insulation.

Eco paint.

Eco homes.

Green buildings.

Green developments.

Green finance.

Almost everything could become sustainable if the right word was placed in front of it.

The words were not wrong.

They simply became easy.

And somewhere amongst all those green labels, perhaps we stopped asking the much harder question:

How much did we actually need in the first place?

“Doing more with less.”— R. Buckminster Fuller

Fuller wasn't arguing that humanity should live with less.

He was asking something far more interesting:

How can human ingenuity make less material do more?

Perhaps that question matters now more than ever.

THE GREENEST MATERIAL

Imagine two buildings required to perform the same task.

The first requires 100 tonnes of structural material.

We develop a new version of that material with significantly lower environmental impact.

That's progress.

We should use it.

But now imagine another building capable of performing the same task using substantially less structural material because its geometry allows that material to work more efficiently.

Suddenly the question changes.

Before asking:

What greener material should we use?

Perhaps we should first ask:

Why are we using so much material?

These ideas are not in competition.

We need better concrete.

Better timber products.

Better composites.

Recycled and renewable materials.

Materials that last longer and can eventually become something else.

But perhaps there is an order to the conversation.

First, use only what is necessary.

Then make what remains as good as we possibly can.

A green label doesn't fix inefficient design.

Better material and better geometry should work together.

NATURE NEVER CALLED IT SUSTAINABILITY

Walk through a forest.

Nothing carries an environmental certification.

Nothing has an eco label.

Nothing announces itself as green.

Yet almost everything around you is extraordinarily economical with material.

A tree is not solid from its roots to its highest leaf.

Bone is not a solid block.

An eggshell does not protect life by becoming centimetres thick.

A leaf does not fill itself with unnecessary structure.

Nature places material where material is useful.

It removes it where it isn't.

It adapts.

It repairs.

It grows.

And eventually, its material becomes available for something else.

Nature does not practise sustainability as a marketing philosophy.

Nature practises necessity.

Perhaps that is the more useful word.

NATURE'S ENGINEERING NOTEBOOK

ENGINEERING TERM 008 — MATERIAL EFFICIENCY

Material efficiency does not mean finding the cheapest material.

Nor does it simply mean finding a greener one.

It means asking:

How much useful work are we getting from every kilogram of material we use?

In the previous Shelter Journals, we explored something most people rarely think about.

Fold a sheet of paper and it becomes stiffer.

Curve a surface and its structural behaviour changes.

Arrange masonry into an arch and material that struggles to span horizontally as a beam can carry loads through an entirely different structural mechanism.

The material didn't change.

The geometry changed what the material could do.

And that has an environmental consequence.

Because every kilogram we don't need...

doesn't need to be extracted.

Processed.

Manufactured.

Transported.

Lifted.

Installed.

Supported.

And one day...

demolished, disposed of or recycled.

GEOMETRY HAS NO EMBODIED CARBON

There is something wonderfully strange about geometry.

You cannot weigh it.

You cannot quarry it.

You cannot mine it.

You cannot put it on a truck.

Geometry itself has no kilograms.

Yet change the geometry of a structure and you can fundamentally change what those kilograms are capable of doing.

Of course, creating complex geometry requires knowledge, engineering, manufacturing equipment and energy.

Nothing is free.

But the geometry itself adds no additional mass to the building.

Perhaps that deserves a larger place in the sustainability conversation.

We spend enormous effort asking how to reduce the environmental impact of the materials we use.

And we should.

But perhaps we should spend just as much effort asking whether intelligent design could reduce the amount of material required before we begin.

Antoine de Saint-Exupéry captured something remarkably close to this philosophy:

“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” Antoine de Saint-Exupéry

For construction, perhaps we can take that thought one step further:

“The first environmental saving is the material you never needed.” Diamond Weave

THE HOUSE WE CALL GREEN

Consider a modern sustainable home.

Solar panels.

Battery storage.

Efficient glazing.

Efficient appliances.

Rainwater harvesting.

Recycled insulation.

Lower-carbon materials.

Every one of those things can improve a building.

But there is another question we rarely see written across the sales brochure:

Did the building itself need to consume as much as it did?

Could better geometry have reduced the structure?

Could components have performed more than one function?

Could manufacturing have reduced waste?

Could the building have been designed to change rather than eventually become unsuitable?

And perhaps most importantly:

Did the family need all of that house on the day they moved in?

WE BUILD TOMORROW'S HOUSE TODAY

Think about how strangely we buy homes.

A young couple may need one or two bedrooms.

But they imagine children.

Visitors.

A home office.

Perhaps an ageing parent one day.

So they buy the house they might need twenty years from now.

Four bedrooms.

Two bathrooms.

Multiple living spaces.

Double garage.

Everything completed.

Everything paid for.

Everything financed from day one.

For years, some of those spaces may barely be used.

But the mortgage doesn't care.

You don't merely buy tomorrow's house today.

You pay interest on tomorrow's house while waiting for tomorrow to arrive.

There may be another way.

WHAT IF A HOME COULD GROW?

Nature rarely begins at its final size.

A tree does not emerge from the ground fully grown.

Neither do we.

Why should a home have to?

What if a household could begin with the shelter it genuinely needs?

A bedroom.

A bathroom.

A kitchen.

A living space.

A home.

Then life changes.

A child arrives.

The home grows.

Working from home becomes permanent.

Add a workspace.

A parent grows older and needs somewhere nearby.

Add another part.

Not demolish.

Not abandon.

Not sell and start again.

Grow.

That changes sustainability from something applied to a building...

into something the building can actually do.

A sustainable home should perhaps not only consume less.

It should be capable of becoming more.

THERE IS MORE THAN ONE KIND OF WASTE

Material is only part of the equation.

There is labour.

Transport.

Packaging.

Temporary works.

Construction waste.

Rework.

Multiple trades repeatedly travelling to the same site.

Materials arriving from different suppliers at different times.

Buildings sitting partially completed while finance continues accumulating interest.

Sustainability isn't merely about what a building contains.

It is also about how the building came to exist.

Which raises another question.

WHAT IF THE FACTORY COULD MOVE?

Instead of always asking:

How do we move the house from the factory?

Perhaps sometimes we should ask:

Can we move the factory closer to the house?

A regional town.

A remote community.

A disaster recovery area.

Or simply...

a field.

Bring the manufacturing capability closer to demand.

Use local materials, businesses and labour wherever practical.

Build what is required.

Then move the manufacturing capability somewhere else.

The homes remain.

The field can become a field again.

Perhaps the greenest home isn't merely one made from a greener material.

Perhaps one day it might be a home grown in a field.

SUSTAINABILITY IS NOT A MATERIAL

Perhaps this is where the word needs rescuing.

Sustainability is not concrete.

It is not timber.

It is not hemp.

It is not steel.

It is not a solar panel.

It is not a certification.

And it certainly isn't a shade of green on a marketing brochure.

All of those things may contribute.

But sustainability is ultimately a relationship between what we consume and what the world can continue to provide.

So perhaps the questions should come before the products.

Do we need it?

How much do we need?

Can geometry reduce it?

Can one component do more?

Can we manufacture it more efficiently?

Can it last?

Can it adapt?

Can it grow?

Can it eventually become useful material for something else?

Only then should we ask what to make it from.

THIS IS NOT AN ARGUMENT AGAINST BETTER MATERIALS

Quite the opposite.

Material innovation matters enormously.

Lower-carbon concrete matters.

Responsible forestry matters.

Recycled steel matters.

Natural fibres matter.

Better composites matter.

The researchers, engineers and manufacturers developing these technologies are solving essential parts of the construction problem.

But better materials cannot make inefficient design disappear.

If geometry allows us to use less material...

and material science reduces the impact of what remains...

and manufacturing reduces waste and labour...

and adaptability prevents unnecessary replacement...

those ideas multiply one another.

They don't compete.

Perhaps genuine sustainability isn't one miraculous material at all.

Perhaps it is simply:

A chain of intelligent decisions.

PERHAPS THE WORD WAS NEVER THE PROBLEM

Maybe sustainability never stopped meaning anything.

Perhaps we stopped demanding enough from it.

We allowed an extraordinarily important question to become an adjective.

Green.

Eco.

Sustainable.

Perhaps it is time to turn the adjective back into a question.

Can we continue doing this?

If the answer is no...

changing the label isn't enough.

We have to change what we're doing.

FINAL THOUGHT

Nature has been building for billions of years without ever using the word sustainable.

Perhaps because Nature begins with a harder discipline.

Waste nothing.

Use geometry.

Use only what is required.

Adapt when circumstances change.

Grow when growth is necessary.

And when something has finished serving one purpose, allow it to become part of something else.

Buckminster Fuller asked how humanity could do more with less.

Saint-Exupéry reminded us that refinement can sometimes come not from adding...

but from taking away.

Nature has been demonstrating both principles for billions of years.

Perhaps we should listen.

Because perhaps the greenest building material really is...

the one you never needed to use.

NEXT WEEK

For more than a century, manufacturing transformed almost everything around us.

Cars.

Aircraft.

Appliances.

Technology.

Food.

Medicine.

But housing remained remarkably resistant.

Perhaps because somewhere along the way, manufacturing became associated with something architecture feared.

Sameness.

Boxes.

Repetition.

Soulless buildings.

But what if manufacturing itself was never the problem?

What if we simply standardised the wrong thing?

What if we stopped trying to manufacture the house...

and instead manufactured the system that allows architecture to remain free?

THE SHELTER JOURNAL | NO. 007

CAN MANUFACTURING SET ARCHITECTURE FREE?

Perhaps the future of affordable shelter is not standardising architecture.

Perhaps it is standardising everything architecture shouldn't have to worry about.

ABOUT THE SHELTER JOURNAL

The Shelter Journal explores housing, architecture, engineering, manufacturing and the future of shelter.

Published by Diamond Weave, it is an invitation to question how we build, what we consume, what we have forgotten and whether there might be another way.