choosing-insulation / Green Building & Sustainable Home Renovation Information & Advice

First published in ecoHouse Canada The thermal performance of wall assemblies and insulation products has long been characterized using R-value, a metric which describes thermal resistance. While R-value is useful, it doesn’t tell the whole story about heat flow through building enclosures such as walls and roofs. Rece...

No matter that engineers and architects long ago debunked it, insulating paint still occasionally finds its way into buildings. Powdered ceramic chips that can be added to any paint are said to reflect heat in or out of a building and reduce heat loss by staggering amounts. I was under the impression that this had been...

Polyisocyanurate (PIR), Extruded Polystyrene (XPS), Expanded Polystyrene (EPS) or Styrofoam? When building or renovating a high-performance building envelope there are really three main kinds of rigid foam panels you are going to have to choose from - Polyisocyanurate known as Polyiso (PIR), Extruded Polystyrene (XPS) ...

LEED Platinum V4 Wall Design: Building Science  The wall we designed for the Edelweiss house, Canada's first LEED Platinum V4 Home is best categorized as a 'REMOTE' wall, a high performance building envelope developed by the Cold Climate Housing Research Centre in Alaska. REMOTE stands for 'Residential Exterior Membr...

Home insulation - how much do you need and where to put it: Think of the heat in your home as if it were water behind a dam, and that insulation levels were the concrete wall of the dam. Would you choose the height of that concrete wall randomly, or would want an even level of concrete to hold back as much water as pos...

Not all insulation materials are the same, and they are not always interchangeable A basic understanding of how walls work is needed to help you understand what you can reasonably expect insulation and building materials to do for you when they are part of a wall assembly. If you have a working knowledge of building sc...

Crawlspace insulation - be careful to get it right A crawlspace comes with all the downsides of a basement, but it is just too low a space to be functional either beyond the folded plastic christmas tree and a couple of boxes of baubles. Unless there is a good reason for it, going through the process of pouring a footi...

Hemp insulation manufactured in Canada! Nature Fibres is a young company based in the town of Asbestos, Quebec, which began manufacturing hemp insulation in the winter of 2018. As the town’s name suggests, it was heavily reliant on the manufacturing of asbestos, but those mining and manufacturing facilities are closing...

  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...

There are many ways to build a slab-on-grade (or frost-protected shallow foundation), the following is a step-by-step walk though of a thickened-edge slab floor we built. XPS or EPS rigid foam is typically used under concrete slab floors, in this case we used mineral fiber insulation. Note: our mineral wool was provide...

1. Asphalt shingles: Asphalt shingles © Ecohome We’ll start with shingles to get it out of the way, because choosing an eco-friendly, durable roof covering starts first with dismissing any idea of installing asphalt shingles. High-embodied energy, rarely if ever recycled, they deteriorate rapidly with UV rays, emit s...