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4 • Damage caused by improper installation or installation not in accordance with CertainTeed’s installation instructions published at the time of original installation. • Damage to the shingles, the roof deck or the structure caused by ice backup or ice damming. • Damage caused by impact, including such things as tools, equipment or foot traffic. • Vandalism or acts of war. • Animals, animal feces or insects. • Any other cause not a result of a manufacturing defect in the shingles. Mold and mildew are functions of environmental conditions and are not manufacturing defects. As such, mold and mildew are not covered by this Limited Warranty or any implied warranty. CertainTeed reserves the right to discontinue or modify any of its products, including the color of its shingles, and shall not be liable as a result of such discontinuance or modification, nor shall CertainTeed be liable in the event replacement material varies in color in comparison to the original product as a result of normal weathering. If CertainTeed replaces any material under this warranty, it may substitute products designated by CertainTeed to be of comparable quality or price range in the event the product initially installed has been discontinued or modified. Inadequately Ventilated and Non-Ventilated Decks Any shingles applied to inadequately ventilated or non-ventilated decks, other than the shingles and deck systems described in the section titled “Insulated Decks and Radiant Barriers,” are subject to a reduced limited warranty period of ten (10) years and do not qualify for SureStart Protection. SureStart™ Protection and the Warranty Period applicable to the shingle are available if CertainTeed determines that the shingle damage was caused exclusively by a manufacturing defect that is unrelated to the inadequate roof system ventilation. Insulated Decks and Radiant Barriers CertainTeed’s Limited Warranty, including SureStart Protection, will remain in force when its fiberglass shingles are applied to roof deck assemblies where foam insulation is prefabricated into the roof deck system (often called “nailboard insulation”), where insulation is installed beneath an acceptable roof deck system, or where radiant barriers are installed, with or without ventilation, directly below the deck. Acceptable roof deck surfaces must consist of at least 3/8" thick plywood or 7/16" thick Oriented Strand Board (OSB) and slopes must be 2:12 or greater. If a different deck surface material will be utilized, please contact CertainTeed’s Technical Services Department for assistance. (See the following important restrictions.) The design professional is responsible for ensuring: 1) the proper quality and application of the insulation and/or radiant barrier, 2) the provision of adequate structural ventilation and/or vapor retarders as determined to be necessary, and 3) that all local codes are met (particularly taking into account local climate conditions). Special attention must be taken if cellular foam, fiberglass, cellulose insulation or other highly permeable insulation will be used in an unventilated system, or if the insulation/rafter or insulation/joist planes may create an air leak that could lead to moisture transmission and condensation problems. All these important factors and decisions, while not the responsibility of CertainTeed, are critical to assure proper deck system performance. Ventilated Nail-Base Roof Insulation Ventilated Nail-Base Roof Insulation products (e.g. FlintBoard® CV) are made of rigid insulation (typically foam board) and another layer of material that provides air space above the insulation and below the nailable deck (which is typically at least 7/16" thick OSB or 3/8" thick plywood). These products can provide soffit-to-ridge ventilation, and if installed in accordance with the deck manufacturer’s instructions to achieve sufficient ventilation, will not reduce the scope or length of CertainTeed’s Limited Warranty coverage. Limited Algae-Resistant Warranty Blue-green algae or gloeocapsa magma, (which has a black/brown appearance and is commonly but incorrectly called “fungus”), can create unsightly streaking on shingles. CertainTeed warrants that the Algae-Resistant (AR) versions of the products in Table 1 will remain free from blue-green algae growth (but not mold or mildew growth) which adversely affects the overall appearance of said shingles for a period of ten (10) or fifteen (15) years, as noted in Table 1. If during the Algae-Resistant Warranty Period specified in Table 1, the overall appearance of the Algae- Resistant shingles is adversely affected by blue-green algae, CertainTeed will pay the reasonable cost to replace or clean at its option, any affected shingles. In the event of replacement or cleaning, for