Thermal barrier / Guides

Air barriers are essential to a properly functioning wall system
Air and vapour barriers

What is an air barrier?

...barriers 100 times more important than vapour barriers, so why is no one talking about them? We don't talk about air barriers because we are too busy talking about vapor barriers. An air barrier is not something you walk into a building supply store and buy; it is a design concept, and arguably a commitment. Products...

Interior sheathing as air & vapor barriers in wood frame construction
Air and vapour barriers

Interior sheathing as an air and vapour or vapor barrier

...barrier and vapour barrier, and eliminating the need to install a separate product to do that job. One of the benefits of OSB as an air barrier is that it is solid. A polyethylene or foil air barrier can be easily pierced by the slightest touch with a sharp tool, without even realizing it. In contrast, it is unlikely...

Passive House wall system ; Larsen Trusses & dense-packed cellulose insulation
Wall assemblies - new construction

Larsen truss wall systems with double-stud construction & extra insulation for new homes & energy efficient home renovation

...thermal bridging . The sheathing is used as the air barrier and vapor barrier , by using a high-performance building tape to seal the joints and the Larsen Trusses are effectively a cost-effective and lightweight way of creating a double-stud wall assembly without creating problems. As for the sheathing, see here to he...

How to Insulate Exterior Walls from the Outside US Canada Ecohome
Walls and Roofs

The easiest way to insulate walls from the exterior in older homes

...thermal insulating qualities. How to avoid thermal bridges when fixing exterior wall insulation in place For insulation to work properly on exterior walls and have a long functional lifespan, the wall system needs to have all the appropriate components , including an air barrier, a vapor barrier /vapor control laye...

Building science for LEED v4 wall design made easy
Concept and design

Building science for LEED v4 wall design made easy - video

...thermal bridges: When one section of a wall conducts heat much quicker than another, we refer to it as a thermal bridge , and that can greatly reduce the overall R value of a wall. Virtually every thermal bridge in this wall assembly was identified and eliminated in the design phase. Thermal breaks in exterior insu...

Off grid, passively heated and cooled house in the Gatineau Hills, Que
Off-grid and Net-Zero Housing

Off grid living blog, part 2: passively heated, this house in Quebec aims for LEED certification

...thermal bridging through studs, provides lots of room for insulation, and the air/vapour barrier is sandwiched between walls where it won't need to be punctured for electrical work, as all wiring is done on the interior 2x4 wall. High efficiency Double wall assembly © Bala Structures Not punch...

Installing foam panel insulation, which is best?
Insulation and soundproofing

Rigid insulation panels: which ones to use for different applications

...thermal insulation panel - most often with aluminum foil facing. Thermal performance is rated at R6-6.5 per inch, but don't count on that if your winters are cold for the reasons we're about to explain. Most insulation products actually perform a bit better the colder it gets but polyisocyanurate breaks that rule. As o...

Finished basements can lead to mold and mildew
Healthy indoor air quality

Why are basements moldy? How to fix or Prevent a Moldy Basement

...barrier and a vapour barrier. However, it has been known to shrink after application, leaving air gaps and a lack of thermal protection. Another downside to the original SPUF is that some blowing agents have a high global warming potential (GWP). For this reason, we like to explore less harmful alternatives whenever ...

Naugler House: the most energy efficient Passive House design in New Brunswick
Efficient home design

New Brunswick's most energy efficient home is Passive House designed

...barrier: OSB with SIGA air barrier tapes Tyvek® water-resistive barrier in rain screen Passive House Windows : Internorm ThermoPassiv sourced through Northwin Windows Thermolec 2kw Thermo Air resistance heater unit Zehnder Comfoair 200 HRV Naugler House annual heating cost [2012-2013] kWh used 690.2 $...

Balanced insulation levels in a green home
Efficient home design

Insulation in Green Home Building, a balanced approach to putting it where it does the most good

...barrier well in the design phase and be very meticulous with air sealing when working onsite. High-quality windows on the south can gain more heat in the day than they lose at night, giving you a net heat-gain. Windows on all other sides always result in a net heat-loss, so keep that in mind, buy good ones and don't ...

Choosing a building envelope
Wall assemblies - new construction

Choosing a building envelope - starting with the perfect wall

...thermal control layer, or insulation: To slow the movement of heat from inside to out in cold months. This is your insulation. It also helps keep heat out of the interior in summer. A vapour control layer, or vapor barrier : Although commonly known as a 'vapour barrier' a better term to use would be a vapour reta...