![]() If you coat the roof, that moisture will have nowhere to go. Heating and air conditioning lead to different levels of humidity and temperature between the inside of the house and the outside air. ![]() The moisture that accumulates in the roof sheathing generally comes from interior humidity which condenses on the underside of the roof sheathing. If this occurs, it may contribute to moisture accumulation within the roofing system.” In addition, non-permeable roof coatings may create a vapor-retarding layer by sealing the voids around and between the shingles. “the problems reported after asphalt shingle roofs have been field coated include shrinking of the coating, which may result in unsightly curling and/or cupping of the shingles or loosening of the granule surfacing of the asphalt shingles. “coatings may negatively impact the performance characteristics (including the fire classification, algae resistance, impact resistance, etc.) of the roof assembly” According to the Asphalt Roofing Manufacturers Association: In almost no case will a roof coating be suitable for a pitched roof. This is simply a bad idea and goes against the recommendations of every reputable shingle manufacturer. When precision is necessary, always refer to the data sheets of the actual, specific product you intend to use, or contact the technical department of the coating manufacturer. This information should not be used if precise values are needed for critical design calculations. Most of the information was compiled from a wide assortment of manufacturers’ technical data sheets or material safety data sheets for actual coating products, and should be considered to be representative but not definitive. This page provides general information about various types of roof coatings. Related Pages About This Roof Coating Information.SEBS Roof Coatings (styrene ethylene butadiene styrene).PVDF Roof Coatings (Polyvinylidene Fluoride).PUMA Roof Coatings (Polyurethane Modified Acrylic).Asphalt Emulsion (Water-Based) Roof Coatings.Asphalt Cutback (Solvent-Based) Roof Coatings.Types of Roof Coatings by Coating Material.Substrate Preparation for Roof Coatings.Applying an aluminized roof coating to a built-up roof with a roller Table of Contents
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |