Pool Enclosures, Inc. offer many styles of swimming pool enclosures, pictured below are some residential lean-to shapes. The 25mm (1" thick) multi-wall polycarbonate roof glazing is extruded in sheet lengths up to 39' long that allows for less horizontal aluminum capping that a glass roof would have. Keep in mind that adequate height is necessary on the building or house that the enclosure will be "leaning against" due to the rise and run of the roof plus the lower wall height. Aluminum structural framing has some span limitations...for large projections it may be better to attach a gabled shaped pool enclosure and turn the pool to run perpendicular to the house vs. horizontal. Frame colors are dark bronze or white baked enamel or powder coat.