Drainage Panel. Properly flashing the bottom of a masonry cavity wall usually requires separate components, but Mortar Net’s TotalFlash Cavity Wall Drainage System combines everything — flexible flashing, a stainless steel drip edge, and nonclogging drainage mesh — in one precut, preassembled panel. The product comes in overlapping 5 1/2-foot-long pieces with sealant and screws and costs about $9.75 per linear foot of coverage. Mortar Net, 800/664-6638, mortarnet.com.

Spray-On. Icynene’s water-blown LD-R-50 Spray Foam Insulation expands to 100 times its applied thickness to completely fill wall and rafter cavities. It does double-duty as a built-in air barrier, and the open-cell foam is water-vapor–permeable. This new formula uses a castor-bean oil ingredient to reduce its petroleum-based content and has an...

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