being made of stainless steel 3152 or similar types of material the rear mounting portion 12 is formed from sheet metal has a first end 14 and a second end 18 the first end 14 is formed into a single accordion pleat defining a slot 16 on the underside of the rear mounting portion 12 for receiving the rear end 28 of the central screen portion 20 once the rear end 28 of the central portion 20 is received by the accordion pleat the first end 14 is crimped together to rigidly retain the rear end 28 of the central portion 20 the second end 18 is generally flat but may have a hooked end 19 the second end 18 of the rear mounting portion 12 is designed to rest between the roof panel 60 and the lightweight shingles 62 on a building the front mounting portion 40 is also made from sheet metal and forms a depending lip or flange 44 that is attached to the front end 26 of the central screen portion by a fold 42 that is crimped over the two layers 22 and 24 the lip 44 may be curved or arcuate and is dimensioned and configured to bear against the front wall 52 of the gutter 50 the fold 42 resting on the ledge 58 the generally u shaped portion 42 of the front lip 40 is crimped or otherwise joined together to fixedly retain the front end 26 of the central.