radiant-floor / Green Building & Sustainable Home Renovation Information & Advice

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...

Radiant floor heat in a bathroom
Delivery: radiant, forced-air and decentralized

DIY radiant floor installation

There is some debate in performance building circles, particularly in the Passive House community as to whether or not you can add enough insulation below a concrete floor to eliminate the need for heating it. We have been on the fence about this and leaned to both sides at different times, but it seems we have now fa...

Radiant floor tube installation
Delivery: radiant, forced-air and decentralized

DIY radiant floor tubing installation video

Here is our DIY video of  how to lay down tubing for our radiant floor in the Edelweiss House. We have a 10 zone system, allowing floor temperatures in each room to be controlled independently. HePex tubing was provided by Uponor, who also use building plans to give customers a zone plan to follow making the install q...

Hydronic heating system
Delivery: radiant, forced-air and decentralized

Hydronic heating

Similar to electric baseboards, hydronic heating systems facilitate zone heating as you can keep different rooms at different temperatures. Though different from electric resistance heating, hydronic systems are ultimately still using electricity to generate heat, so all the same environmental realities apply. Heating ...

Heating an off-grid home
Off-grid and Net-Zero Housing

OFF GRID LIVING BLOG, PART 4: Off-grid heating systems - lessons learned from our off grid home

This is the fourth piece in a blog series written by Craig Anderson as he documents the design and construction of an off-grid LEED Gold passively-heated home. See post 1 of the off-grid homes blog here, the overview . or post 2 in the off-grid homes blog here covering design and construction choices. or here see post ...

Basement wall insulation
Insulation and soundproofing

Properly insulating basements and concrete slab floors

  Insulating a basement is a great idea if it wasn't insulated when built, as before we began insulating foundation walls and below slabs (see slab on grade), it was generally estimated that basement heat loss accounted for about 1/3 of the total heat loss of a house. It is likely that such an abysmal starting place ma...

Polished concrete floors and counters
Paints, finishes and natural coatings

Finishing concrete floors with silicate densifiers

Polished concrete floors are extremely durable and non-toxic; silicate-based densifiers keep them that way and make it a great start to safe indoor-air quality in a home. This is an excellent flooring option for anyone with chemical sensitivities who wants a beautiful and durable eco-friendly floor in their passive sol...

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

Why build a frost protected shallow foundation using prefabricated foam forms ? Building a frost protected shallow foundation (FPSF) is a well-proven alternative to building deeper, more-costly foundations in cold regions with seasonal ground freezing and the potential for frost heave. Traditional foundations for cold ...

90 year old red pine refinished with zero VOC floor oil
Paints, finishes and natural coatings

How to find a healthier wood finish

Is Polyurethane floor seal non-toxic? In North America, polyurethane varnish is used almost exclusively as a wood floor finish, but the majority of them are high in VOC's which are detrimental to interior air quality and health. For this reason non-toxic wood floor finishing oils are gaining in popularity. There are a ...

How radiant floors work
Delivery: radiant, forced-air and decentralized

How to design for thermal comfort in a home

Have you ever noticed that at times you can feel cold in your home even though the air temperature is exactly where you like to keep it? That's because, contrary to what most of us think, air temperature is not the main factor that determines human comfort in a building. To illustrate a point, let's start outdoors. I m...

Crawl Spaces or Slab on Grade Foundations?
Foundations and Basements

Slab on grade or crawlspaces, which is better?

What is the difference between a slab on grade & a crawl space? A slab on grade, or ‘frost protected shallow foundation’ is exactly that, a slab of concrete on the ground. There’s more to it of course, but let’s start with a ‘win’ in the comprehension department shall we?  A slab on grade rests directly on the gro...