Deck and Wall Overlays
Deck and Wall Overlays
General
| NOTE: See also Accepted Roof Deck Overlay Board products |
For RoofStar Guarantee Standards pertaining to Deck Overlay Boards, refer to the appropriate subsections in either Low Slope Roof Systems or for Architectural Sheet Metal Roof Systems.
A roof deck overlay (also called a system underlay) is installed under the roof system and over the roof deck assembly. These products are most commonly placed over steel decks to provide a level surface for the membrane, or as a thermal barrier between the roof deck and combustible insulation.