Roofing Terminology
(Click on a letter to learn more)
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
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.
Back to Chapple Brothers Main Page