Anchor system for completed structures

In an existing completed permanent frame structure having a sloped roof supported by a plurality of rafters and covered by a plurality of rows of shingles, each of the shingles having an upper portion secured by an overlying shingle and a lower portion resting atop an underlying shingle, an external anchoring system comprising:

• a plurality of attachment means, said attachment means externally mounted to the rafters of the structure;
• a plurality of shingle securing lines, each of said shingle securing lines having a first end and a second end, said first end attached to one of said plurality of attachment means, and said second end attached to another of said attachment means such that each of said securing lines extends tautly from one of said attachment means to the other of said attachment means in a longitudinal and horizontal direction across the roof, parallel and in contact with the plurality of rows of shingles;
• a plurality of line straps, said line straps securing and overlying said shingle securing lines at points between said attachment means where said shingle securing lines cross over the rafters of the structure;
• and
• a plurality of securing means, each of said securing means passing through one of said line straps, through one of said shingle securing lines, through the shingles, and fixedly secured to a rafter of the frame structure, whereby said securing means providing additional security to prevent the broken of said single securing lines.