There are several explanations as to why warehouse clubs charge membership fees and. how the fees play a role in the competitive landscape of the retail grocery market. We provide. another insight into the nature of the membership fee using a model of price competition. between a warehouse club and a supermarket.
A prescriptive ignition barrier is required within a residential application over the surface of the polyurethane foam insulation when used within accessible attics or crawlspaces. Interior surfaces in inhabited buildings should be covered with a 15 minute thermal barrier for fire protection.
1 Sill flashing membrane wrapping up the jambs and over the sheathing membrane at the sill (3) 2  Proper lapping of flashing layers and the sheathing membrane (4) 3  Drainage gap behind the window flange (5)  Backer rod and sealant to provide continuity of the air barrier (6)