icf / Green Building & Sustainable Home Renovation Information & Advice

ICF Block Construction - The Definitive History of ICFs from 1932 to 2023 © R j
Concrete and masonry

The definitive history of ICF blocks and ICF construction

...ICFs - Contents What is the history of ICFs ? What is the History of Plastic foam ICF's  ICF blocks aren't made of styrofoam Who invented foam ICF construction blocks? Which was the first ICF block construction? What happened next in the history of ICFs? The History of ICFs Timeline The History of ICF Blocks  To ...

Workers assemble ICF blocks to pour a basement foundation
New foundations and slab-on-grade

Is ICF the Best Way to Build a Basement?

...ICFs and why they are the choice for a truly high-performance basement. Below is an overview of the sections we will cover, allowing you to jump directly to the information you need. What are ICFs? ICF vs. poured concrete: Which is best? Energy efficiency and comfort with ICF homes Understanding thermal bridging Struc...

Wall assemblies - new construction

Is Building ICF Homes a Good or Bad Idea?

...ICF blocks? Why ICF is the best choice for basements: cost and performance ICF foam explained: It's EPS, not Styrofoam™ Key benefits of building with ICF blocks The environmental impact of ICF construction Should you build a whole home with ICF? In brief: The case for ICF What are ICF blocks? ICF blocks are hollow, i...

Black Graphite EPS foam Panels as Part of a Prefab Wall. Image © Feris Buid Tech
Insulation and soundproofing

Graphite-Enhanced EPS (GPS): The Next Generation Rigid Foam Insulation

...ICF) and foundations G-EPS is offered by some manufacturers of ICF blocks, which serve as both the formwork and permanent insulation of concrete walls. Furthermore, its excellent long-term water absorption resistance makes it highly suitable for below-grade applications like insulating basement walls, crawlspaces, and ...

Prefab frost-protected shallow foundation insulated form kit
Slab on Grade

Raft slabs - how to build insulated frost protected shallow foundations (FPSF) on problem soils

...ICF foundation wall. This provides a continuous layer of insulation separating the concrete from the ground. The result is a very comfortable and energy efficient basement, with no thermal bridging and reduced risk of mold.  Basement mockup with frost protected shallow foundation forms and ICF wall courtesy of  Treehu...

Concrete, wood and steel structures compared - Timber Frame wins!
Materials and resources

How wood structures compare to steel and concrete for carbon footprint

Wood, steel and concrete each have specific structural advantages, each with their own characteristics. The following is a life-cycle comparison conducted by the Athena Sustainable Materials Institute (ASMI) of the materials only, and does not include any considerations of how they each affect thermal performance, vapo...

Choosing a building envelope
Wall assemblies - new construction

Choosing a building envelope - starting with the perfect wall

...ICF - Insulated Concrete Forms: ICF block  diagram courtesy Fox Blocks This is a system of polystyrene blocks that are stacked and filled with concrete to form the entire wall system of your home, you can read about the definitive history of ICF blocks here. Building with ICF blocks is great for reducing sound transm...

A close up of a concrete crack being repaired with self healing concrete
Foundation and basement improvements

Self-healing Concrete: The Definitive Guide to Self-Repairing Foundations

...ICF basements and frost protected shallow foundations (raft slabs). Benefits for new residential construction Integrating self-healing properties into a new home foundation offers several advantages for energy efficiency and resilience. By making the concrete itself the primary water barrier, builders can simplify the...

How to Build a Frost Protected Shallow Foundation (FPSF) Forms
Delivery: radiant, forced-air and decentralized

Design and construction of frost-protected shallow foundations with radiant heat

...ICF dowels/anchor bolts and confirm their locations with framing contractor and ensure bolts are offset from studs and have a minimum of 3” embedment in concrete. Steel trowel surface using power trowels. Keep top of slab moist for three days to minimize shrinkage and cracking. (Concrete chemically sets, then subsequen...

Pouring a Monolithic Slab on grade for a Passive Solar LEED Home © Ecohome
Slab on Grade

Monolithic slab-on-grade foundations - Super insulated for LEED Homes & Passive House

...ICF walls on top for very effective and durable basement design.  Advantages of a monolithic slab foundation The first notable advantage of a monolithic slab is that it is done in a single trip of concrete trucks and work crews. It costs a lot to get a foundation crew and pump truck to show up on site, so one trip ins...

Insulated Radiant Floor ICF Foam Forms Heated with Air
Delivery: radiant, forced-air and decentralized

Air-heated radiant floor slab foam forming systems

Radiant heating systems are very common in concrete floors now because they provide a very balanced and comfortable distribution of heat. Those systems are most commonly hydronic, meaning heated liquid is pumped through tubing in the concrete which then radiates that heat into the house. View the slab on grade foam for...