| Lap |
that part of a
roof or flashing that overlaps or covers any portion
of the same or another type of adjacent component.
|
| Lead |
a soft workable metal used for
miscellaneous flashings. |
| Life cycle costing |
a method of economic analysis
that takes into account expected costs over the useful
life of an asset. |
| Lift |
the sprayed polyurethane foam
that results from a pass. It is usually with a certain
mass thickness and has a bottom layer, center mass,
and a top skin in its make up. |
| Light reflectance |
the percentage of light that
is not absorbed by the surface of the material. |
| Live Loads |
temporary loads that the roof
structure must be designed to support, (e.g., people,
installation equipment, rain, snow, ice, etc.) |
| Loose laid membranes |
membranes that are not attached
to the substrate except at the perimeter. Typically
held in place with ballast. |
| Low Temperature Flexibility |
the ability of a membrane to
remain flexible after it has been cooled to a low temperature. |
