Membrane roofing

A roof comprising:

• a roof deck;
• underlayment secured to the roof deck, the underlayment comprising multiple rigid foam boards, each board having two broadest sides defining a thickness therebetween, and a reinforcing facing comprising a flexible base resin membrane bonded across one of the broadest board sides and an array of touch fastener elements extending from the base resin membrane and exposed for engagement, the touch fastener elements having individual resin stems extending integrally from a surface of the base resin membrane and molded heads defining overhangs for engaging fibrous loops;
• and
• a flexible roof membrane extending over the underlayment, the roof membrane comprising a water-impervious sheet with a field of fastener elements exposed on an underside thereof and engaged with the fastener elements of the underlayment to secure the roof membrane;
• wherein the roof is configured to withstand an up-lift force of at least about 90 pounds per square foot.

A roof comprising:

• a roof deck;
• underlayment secured to the roof deck, the underlayment comprising multiple rigid foam boards, each board having two broadest sides defining a thickness therebetween, and a reinforcing facing comprising a flexible base resin membrane bonded across one of the broadest board sides and an array of touch fastener elements extending from the base resin membrane and exposed for engagement, the touch fastener elements having individual resin stems extending integrally from a surface of the base resin membrane and molded heads defining overhangs for engaging fibrous loops;
• and
• a flexible roof membrane extending over the underlayment, the roof membrane comprising a water-impervious sheet with a field of fastener elements exposed on an underside thereof and engaged with the fastener elements of the underlayment to secure the roof membrane;
• wherein the fastener elements of the underlayment comprise discrete fastening hooks, the roof configured to withstand an up-lift force of at least about 0.005 pounds force per hook.

A roof comprising:

• a roof deck;
• underlayment secured to the roof deck, the underlayment comprising multiple rigid foam boards, each board having two broadest sides defining a thickness therebetween, and a reinforcing facing comprising a flexible base resin membrane bonded across one of the broadest board sides and an array of touch fastener elements extending from the base resin membrane and exposed for engagement, the touch fastener elements having individual resin stems extending integrally from a surface of the base resin membrane and molded heads defining overhangs for engaging fibrous loops;
• and
• a flexible roof membrane extending over the underlayment, the roof membrane comprising a water-impervious sheet with a field of fastener elements exposed on an underside thereof and engaged with the fastener elements of the underlayment to secure the roof membrane;
• wherein the underlayment is secured to the roof deck in part by washers having touch fastener elements for engaging touch fastener elements on the roof membrane.

A roof comprising:

• a roof deck;
• underlayment secured to the roof deck, the underlayment comprising multiple rigid foam boards, each board having two broadest sides defining a thickness therebetween, and a reinforcing facing comprising a flexible base resin membrane bonded across one of the broadest board sides and an array of touch fastener elements extending from the base resin membrane and exposed for engagement, the touch fastener elements having individual resin stems extending integrally from a surface of the base resin membrane and molded heads defining overhangs for engaging fibrous loops;
• a flexible roof membrane extending over the underlayment, the roof membrane comprising a water-impervious sheet with a field of fastener elements exposed on an underside thereof and engaged with the fastener elements of the underlayment to secure the roof membrane;
• and
• ballast secured to an upper surface of the membrane by touch fastener elements.