The James Hardie HardiePlank Select Cedarmill (primed) is part of the Siding
test program at Consumer Reports. In our lab tests, Siding
models like the HardiePlank Select Cedarmill (primed) are rated on multiple criteria, such as those listed below.
Cold impacts: Cold impacts is resistance to damage from blows at 0 degree Fahrenheit.
Warm impacts: Warm impacts is resistance to damage at roughly 70 degree Fahrenheit. Impacts mimic blows from fallen objects and other mishaps.
Wind: Wind is siding's ability to stay attached in lab tests simulating high winds; the best withstood forces equivalent to more than 150 mph.
Foam-backedFoam backing that may increase the insulating value of the siding (we did not test for this), but will also afford other aesthetic benefits, like crush resistance.
Longer lengthsAvailable in lengths longer than the typical 12 to 13-foot vinyl siding panel, so it will have less vertical seams on long windowless walls.
Deep profileThe front edge extends at least 3/4-inch from the face of the panel providing a wider shadow line and making the siding seem more like real wood.
Double hemNailing hem is folded over (doubles the thickness of the material) increasing attachment strength and reducing the chances of the siding being blown off the wall by very high winds.