
Insulation & Air Sealing

Soffits should be tight boxes hidden in your ceiling.

Two packages for high performance homes. Vented and unvented roof insulation retrofits and exterior wall insulation details along with rainscreen wall details for furring strips.


Crawlspaces offer all of the headaches of a basement and none of the benefits.

But some buckets are more relative

Why a rain screen wall is important to the energy and durability detailing on a Passive House.

How to detail the foam at corners and connections when tightening the energy efficiency of an old house

The biggest crack in the house, revisited for #ThrowbackThursday

Roofs get wet at night—Heat flows through the easy path—Framing is a bridge.

Electrical outlets, plumbing pipes and bathtubs are underestimated in their importance.

Covering the roof of an old house with a blanket of insulation makes the house more comfortable and it cuts energy use.

The second layer of foam is the air barrier and drainage plane.

New energy codes are coming (very) soon; many states are jumping straight to the most aggressive one

#ÜberRoof: A site-built ventilated SIP roof sandwich.

A faster way to build affordable housing in a tropical climate. It is a quick build when compared to standard block and stucco.

The complete video collection on insulating, air sealing, and installing windows in a superinsulated sunroom addition in Wayland, MA

Furring the inside of masonry walls makes room for wires and can significantly improve the R-value
