Laminated shingles -  Strip shingles containing more than one layer of tabs to create extra thickness. Also called three-dimensional shingles or architectural shingles.

Lap -   To cover the surface of one shingles or roll with another.

Lap cement -  An asphalt-based cement used to adhere overlapping plies of roll roofing.

Low slope application - Method of installing asphalt shingles on roof slopes between two and four inches per foot. LADDER, FIXED - A ladder which is permanently attached to a building.

LAMINATED GLASS – Two or more lites of glass permanently bonded together with one or more inter-layers.

LAP - To extend one material partially over another; the distance so extended.

LEAD - A malleable metal once extensively used for flashings.

LEAN-TO-ROOF - the sloping roof of a building addition having its rafters or supports pitched against and supported by the adjoining wall of a building.

LEVELING ROD - A rod with graduated marks for measuring heights or vertical distances between given points and the line of sight of a leveling instrument. They are longer than a yardstick and are held by a surveyor in a vertical position.

LINTEL - or header - A horizontal piece of wood or steel over an opening such as a window or door. to support the walls immediately above the opening. Lintels can also be steel or stone.

LIQUID-APPLIED MEMBRANE - Generally applied to cast-in-place concrete surfaces in one or more coats to provide fully-adhered waterproof membranes which conform to all contours.

LIQUIDATED DAMAGES – A monetary amount agreed upon by two parties to a contract prior to performance under the contract that specifies what a either party owes the other if that party defaults under the contract.

LITE – Another term for a pane of glass. Sometimes spelled "light" in industry literature but spelled "lite" in this text to avoid confusion with light as in "visible light."

LIVE LOAD – Loads produced by use and occupancy of the building or other structure and do not include construction or environmental loads such as wind load, snow load, ice load, rain load, seismic load, or dead load.

LOT - A parcel of ground with boundaries determined by the county.

LOOSE LAID – In roofing, a membrane "laid loosely", i.e., not adhered, over a roof deck or BURM. LADDER, FIXED - A ladder which is permanently attached to a building.

LAP - To extend one material partially over another; the distance so extended.

LEAD - A malleable metal once extensively used for flashings.

LEAN-TO-ROOF - the sloping roof of a building addition having its rafters or supports pitched against

and supported by the adjoining wall of a building.

LIQUID-APPLIED MEMBRANE - Generally applied to cast-in-place concrete surfaces in one or more coats to provide fully-adhered waterproof membranes which conform to all contours.

LIVE LOAD - The weight superimposed by snow or water or other tangibles which lack permanency, not including the wind load, on a roof.

LOOSE LAID - A membrane "laid loosely", i.e., not adhered, over a roof deck or BURM.