Crawlspace

Moisture Management of the Crawlspace: Concrete Floor

January 20, 2011 by Anne

After the four inch gravel layer, sealed poly sheeting and rigid EPS foam insulation we finish off our crawlspace with a three inch thick layer of concrete. Concrete not only protects the foam but also protects the the house from termites and other pests.

Crawlspace Insulation - Expanded Polystyrene (EPS) Foam Insulation

January 19, 2011 by Anne

To achieve superior thermal performance, durability and protection from the elements our crawl space floor is a multi-layered assembly. First, the space was filled with 4 inches of gravel for drainage, followed by heavy duty polyethylene sheeting as a vapor barrier. The third layer is 3" thick expanded polystyrene (EPS) foam sheeting for insulation.

Moisture Management of the Crawlspace: The Vapor Barrier

January 6, 2011 by Anne

To protect the house from water vapor entering the crawlspace by evaporation of water contained in moist soil, we cover the gravel base with a high performance vapor barrier. The materials are made using virgin high density polyethylene . This bright yellow product is called StegoWrap. It's a tough 10 mils thick and very puncture resistant.

Moisture Management of the Crawlspace - Gravel Base

January 5, 2011 by Anne

As designers and builders of high-performance homes, we believe in buildings that will remain durable over a long time (like 100 years or more at a minimum). Persistent moisture on wood will eventually lead to rot and failure of joists, sills and posts. Moisture also creates an ideal environment for mold, mildew and fungus which causes poor indoor air quality. Keeping everything dry is the single most important element of durable, healthy buildings.

Crawlspace Drainage System

January 4, 2011 by Anne

In the middle of the crawlspace floor area on top of the building pad we place a perforated drain pipe with gravel and cover it with filter fabric.

Copper Termite Shield

December 19, 2010 by Anne

A copper termite shield is installed around the entire foundation. It may be expensive now but a good investment when compared to the damage termites can cost a homeowner over the lifetime of the house.

Construction

Passive House

EPA - Indoor Air Plus