Yes, all the plastic hive parts (except one or two bottoms and one top) that i have (and have seen) are warped. Inner covers the worst, then boxes. Tops and bottoms the least warping. Karen > -----Original Message----- > From: Bob Harrison > Walter Kelley asked my opinion of his hard plastic beeware years > ago. I said > I would be afraid they would warp over time (yes I bought a few to try!). > Took longer than I thought but the tops and bottoms did all warp after a > long time. Would the poly hive last a 100 years as Murray suggested > without warping? I do not know but have to wonder. Walter kelley's plastic > tops and bottoms were very ridged but still warped. Did others on the list > have the same experience as I did with the Kelley plastic equipment?