Question 1

What is AirCrete?

Accepted Answer

AirCrete is a building material made by inflating cement with foam bubbles. It forms cellular cement, classified under ACI 523.1R and ASTM C869. Though it has low tensile strength, when reinforced with fabric, it becomes a full structural building system suitable for walls and roofs.

Question 2

How to make AirCrete?

Accepted Answer

Mix 94 lbs of Portland cement with 5 gallons of water to make slurry. Then mix in foam generated from another 5 gallons of water with foaming agent. Once the volume reaches 6 cubic feet, pour into molds.

Question 3

How to make a foam machine?

Accepted Answer

Use a 1.2–1.5 GPM water pump and combine with air from a compressor at 90 psi. Send air-water mix through a T-joint into a 1.25 inch PVC pipe filled with stainless steel wool pads. Output goes into your mixing container. Full plans are taught in the TinyGiantLife.biz course.

Question 4

What is the foaming agent used for AirCrete?

Accepted Answer

Use professional agents like Drexel FM160 (1 oz/gal) or Vermillion (0.6 oz/gal). Dish soaps like Dawn 2X can be used for tests (5 oz/gal), but they are less stable and not ideal for building.

Question 5

What is the cost of building an AirCrete house?

Accepted Answer

Wall costs range from $12–$32 per square foot depending on geometry and thickness. Total house cost also includes foundation, roof, and appliances, which usually exceed wall cost.

Question 6

How does AirCrete compare to other building methods?

Accepted Answer

AirCrete is generally more affordable than lumber or adobe walls. For example, a 4x8 wall costs ~$56 with AirCrete vs $102 in lumber. Cob, wattle, and daub can be cheaper but require more labor and materials.

Question 7

Why do people choose AirCrete to build with?

Accepted Answer

People choose AirCrete for its low cost, fire resistance, pest resistance, ease of building, non-toxic nature, and ability to create unique shapes. It offers high insulation potential and fast construction.

Question 8

Can I build a passive off-grid house without AC using AirCrete?

Accepted Answer

Yes. With proper solar glazing, thermal mass, and airflow design, AirCrete can be used for passive solar homes without air conditioning. These methods are taught in TinyGiantLife.biz workshops.

Question 9

Is there an online course for learning AirCrete building?

Accepted Answer

Yes. TinyGiantLife.biz offers a complete online course covering AirCrete, solar, electrical, plumbing, and full home construction.

Question 10

Are AirCrete blocks load-bearing?

Accepted Answer

Yes. AirCrete blocks with 50–120 psi compressive strength can handle roof and even second-story loads when properly designed with bond beams or structural posts.

Question 11

Are AirCrete blocks waterproof?

Accepted Answer

No. They must be sealed to protect insulation value and prevent freeze-thaw damage. Water can be absorbed and may cause surface cracking if unsealed and frozen.

Question 12

Can AirCrete be used in cold climates?

Accepted Answer

Yes, if walls are thick enough and construction is completed before freezing. Wet AirCrete must not be exposed to freezing during curing.

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