Abstract: Rows of longitudinally spaced channel-like brackets are secured to supporting means for a sheet metal roof or siding and each bracket has spaced side walls with flanges extending downwardly from their tops. A gutter extends through the brackets in each row and is supported by them. A clip overlies the gutter in each bracket and is hooked under the bracket flanges. Sheet metal pans on the roof-supporting means at opposite sides of the gutter have side portions extending upwardly beside the brackets, with their upper marginal areas turned inwardly over the clips and gutter. A cap above the gutter and overlying clips has downwardly extending side flanges overlapping the side portions of the pans. Screws extend down through the cap and into the central portions of the clips, which engage the lower surface of the cap, to fasten the cap to the clips.