Patent ID: 11913235
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E  F

Claim 16:
17. A system of underlayment for a roof structure, said system comprising:
a first underlayment material disposed in covering relation to a roof deck of the roof structure,
at least one mechanical fastener disposed in disposed in interconnecting relation to said first underlayment material, a second underlayment material, and the roof structure,
said at least one mechanical fastener including an independent and separable outer plate and under plate, and a connector,
said outer plate including magnetically attractive properties,
said under plate comprising a composition that includes at least a flexible chlorinated polyethylene material inclusive of isotropic barium ferrite to allow said under plate to exhibit magnetic properties,
said under plate disposed on an exposed face of said first underlayment material, said second underlayment material disposed in covering relation to said exposed face of said first underlayment material and said under plate,
said outer plate disposed on an exposed face of said second underlayment material and in an overlying relation to said under plate through said second underlayment material, and
said connector penetrating through said outer plate, said second underlayment material, said under plate, and said first underlayment material into secured relation to the roof structure.