Show SHI SHINGLES LAST A CENTURY roofs of white cedar resist Clim climatic tle there are said to be michigan white cedar shingles now doing good service on roofs in that tate state that have been in full exposure and wear for over 75 years it is thus seen that climate affects the durability of shingles and the fact faett that hat white cedar ar is the natural product of michigan and red cedar of the pacific coast is held beld to be proof that the red cedar cecar is naturally adapted for use on the pacific coast and the white for use in such sections as the middle and northwestern states etc A tion is brought against the red cedar by some namely that there exists in that wood an acid which is in the climate of cerwin certain sections so acted upon by water as to corrode rapidly the nails with ith which the shin shingles glea are fastened onto roots roofs the rust extending to the wood around the nails and soon causing a leaky roof this action explaining the holes so eo often to be seen around the nals in red cedar roofs another point offered for consideration in this connection is the fact as stated that a shingle s s ruined by kiln drying and that no kiln dried lumber can be regarded as of equal value for outside work to that which is air dried |