Abstract: A hold down clip is installed on the rafters or a building to secure a membrane between the rafters before the roof is put on the building. The rafter hold down clip and membrane create an air gap between the rafters, thereby creating an insulation layer beneath the roof. The depth of the air gap is determined by the length of the legs of the rafter hold down clip. In a presently preferred embodiment of the invention, the legs are about 1.5 inches long, and therefore create an air insulation gap about 1.5 inches deep.

Abstract: A weep hole cover fits into an existing weep hole and expands for a friction fit in the weep hole. A vertical front plate includes a plurality of holes to permit seepage from the air gap behind a brick facade. A pair of vertical side plates extend back from the front plate, each at a right angle to the front plate. A pair of angled plates extend back from the side plates to contact the bricks on either side of the weep hole. The angled plates collapse for insertion of the cover into the weep hole, and then spring out again for friction contact with the bricks on either side of the weep hole.

Abstract: A fastener-angling device provides for positioning a nail at a predetermined angle between the face of a sheet metal connector and a wood member such as a stud. The preselected angle is substantially less than 90 degrees. The device is formed by pressing a truncated half-cone into the sheet metal by means of a die and then forming a nail-receiving hole in the truncated half-cone. This structure eliminates the metallurgical weak point exhibited by slits while still providing a positive guideway for the nail. The nail-receiving hole and the guideway are dimensioned so that nail inserted into the nail-receiving hole can only enter the wood member at the desired angle.