I would like to install white pine shingles on my roof and white pine clapboards (4"reveal) siding. I have read that flat sawn cups and 1/4 sawn splits very easily. the shingles will be nailed to 1x6 spaced to the shingle length an reveal, (Unknown at this time)The attic is unheated. Can the shingles be dip treated with water repellant or should I leave natural. The siding may be nailed to 4" sips or 2" foam with vertical furring strips depending on my budget. Any help or advice would be appreciated, Thanks John...