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[quote]QUOTE: Originally posted by Paul Milenkovic One board, two board, pink board, blue board! That curl is a real pain when trying to get a flat contact between the cement wall and the insulating board so you don't get air leakage and loss of insulating power by having cold air flow past those gaps. Anyone else have trouble trying to get a flat surface out of foam board? Is the problem specific to pink board? [/quote] These foams are meant to be plastered over, so to answer your question, no, the problem relates to all of them. At lest with thicker boards. The thinner half inch to one inch seem to be straighter to the ends. I haven't even begun my railroad yet - still working on drying the basement. But I use this stuff all the time in my work for sculpting, and have noticed the difference. Might be worth a look to see if you could top the 2" with a 1/2" peice?
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