Hi I have these panels of XPS covered with OSB. The OSB is shiplaped and is a very tight fit. However the xps behind it has 1/8th gaps at the seams. Is it necessary to fill these seams if the OSB is tightly sealed over the seams. Here are some pictures.Name:  Barricadegap2.jpg
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Size:  54.5 KBName:  Barricadegap4.jpg
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