US 2009/0255201 A1 · MEMBRANE ROOFING

Abstract

A foam roofing underlayment is provided with a reinforcement membrane having an array of fastener elements for engaging fastener elements on a flexible roof membrane. The underlayment is formed by molding foam between the reinforcement membrane and a carrier membrane. The underlayment in secured to the roof using washers having fastener elements for engaging the fastener elements of the flexible roof membrane. An anti-peel flap with fastener elements is provided around the periphery of the washers. A slip sheet is used between the underlayment and the flexible roof membrane to permit accurate positioning of the flexible roof membrane prior to engagement of the fastener elements. The interstices between the fastener elements provide lateral moisture paths to vents in the flexible roof membrane.

Claims31

Dependent claims

A construction underlayment comprising:

a rigid foam board having two broadest sides defining a thickness therebetween;
and
a reinforcing facing comprising a flexible base bonded across one of the broadest board sides and an array of touch fastener elements extending from the base and exposed for engagement.

Dependencies are inferred from the claim text.

Facts

Application

12/420,267Filed 8 Apr 2009

Priority

10 Apr 2008

Published

15 Oct 2009

Term ends

Not estimatedThe source records don’t support an estimate.

Classification22 codes

E04D 5/144
Fastening means therefor: mechanical fastening means
B29C 39/18
For making articles of indefinite length: incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
B29C 44/306
Expanding the moulding material between endless belts or rollers: longitudinally shaping, e.g. the belt
B29C 44/32
For articles of indefinite length: incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements

Membrane roofing

Life of this patent

Membrane roofing

Life of this patent

Abstract

Claims31