I personally wouldnt recommend it. That was a big push years ago to make wood duck boxes out of plastic. However, no research had been done. What they learned was the heat build up inside certain plastic houses generated too much heat and somewhat cooked the eggs. Use the word "cook" in a figurative manner. Success was lower thus egg failure higher in the plastic boxes with ambient temperature being one of the measured variables. Brood death also occured within the plastic boxes. The location is obviously another variable to consider (i.e, northern versus souther latitudes). My studies were in the southeast. Not northern latitudes, which probably wouldnt have as significant effect. Shade placement, etc.. also are key variables. Some of the products today (plastics) are probably suitable. I have heard of numerous success stories. Just something to think about.
"Waterfowl are Missionaries of the Air" - Jack Miner