Laserfiche WebLink
WATER VAPOR REDUCTION SYSTEM <br />Section 07260 <br />15-1207 <br />1.08 PROJECT / SITE CONDITIONS <br />A. Environmental Conditions: <br />1. Do not apply water vapor reduction system to unprotected surfaces or when water is <br />accumulated on the surface of the concrete. <br />2. Do not apply water vapor reduction system when temperature is lower than 50° F or <br />expected to fall below this temperature within 24 hours from time of application. <br />3. Allow continuous ventilation and indirect air movement at all times during application <br />and curing process of the water vapor reduction system. <br />B. Protection: Protect water vapor reduction system to prevent damage from active rain or <br />topical water for a minimum period of 24 hours from time of application. <br />PART 2 - PRODUCTS <br />2.01 MATERIALS <br />A. General: Use materials of one manufacturer throughout the project as hereinafter specified. <br />B. Water Vapor Reduction System: "VAP 12000" System as manufactured by Koester <br />American Corporation (757) 425-1206; there are no known equals. <br />Coating, containing specifically formulated chemicals and resins to provide the <br />following characteristics and properties in a one coat system. No multi -coat systems <br />allowed. System must contain 100% solids. <br />a. ASTM E 96, Water Vapor Transmission (wet methods) Performance shall be <br />documented by an independent testing laboratory at a minimum 94% for Koester <br />VAP 1® 2000 System water vapor transmission reduction compared to untreated <br />concrete. <br />b. ASTM D 1308; Insensitivity to alkaline environment up to, and including, pH 14 in <br />a 14 day bath test. <br />C. ASTM F 3010-13; Moisture Mitigation Systems for use under resilient floor <br />coverings. <br />d. ASTM F 1869-98 minimum 94% reduction. <br />e. Water Vapor reduction system shall be a single coat, stand alone system with no <br />requirements for additional components such as sand broadcast for adhesion of <br />flooring systems. System shall reduce MVT levels to less than 2.5 lbs/24 hours <br />per 1000 sq. ft. <br />f. Certify acceptance and exposure to continuous topical water exposure after final <br />cure. <br />2.02 MIX DESIGNS <br />A. Use clean containers and mix thoroughly as per Manufacturer's requirements to obtain a <br />homogeneous mixture. Use a low speed motor less than 400 rpm and a two bladed Jiffy <br />mixing blade only. DO NOT AERATE. Mix ratios are measured by volume. <br />B. VAP 1® 2000 Mix Ratio: Mix Component A and B at a ratio of 2.4:1 by volume. <br />3 <br />