Abstract: Provided herein is a self-adhesive underlayment and an apparatus for its manufacture. The apparatus is operative to remove portions of release sheets covering upper and lower adhesive membranes and compress resulting exposed adhesive surfaces of the membranes to upper and lower surfaces of a flexible heating element.

Abstract: Provided herein is a self-adhesive underlayment and an apparatus for its manufacture. The apparatus is operative to remove portions of release sheets covering upper and lower adhesive membranes and compress resulting exposed adhesive surfaces of the membranes to upper and lower surfaces of a flexible heating element.

Abstract: Disclosed herein are various waterproof membranes that may be applied to a sill surface of an opening in a building structure to waterproof that surface as well as direct water that penetrates through the opening out of the structure. Generally, a flexible waterproof membrane is adhesively applied to the sill surface for purposes of waterproofing that surface. In one arrangement, the membrane includes a conformable adhesive flap that extends beyond the front edge of the sill surface and which is flexible to allow stretching and adhering the flap to a surface that is transverse (e.g., vertical) to the remainder of the membrane. The membrane also includes a non-adhesive flap that may be disposed over the adhesive flap once it is adhered in a desired orientation. The non-adhesive flap provides a durable surface for the adhesive flap once it is stretched and adhered in place.