Winter is difficult on the outside concrete surfaces because of the snow, rain, ice and changing temperatures. If the concrete is not properly sealed with performance sealers or deniers and the weather and moisture can cause deterioration and cracks, like crumbling cookie. Unprotected concrete is like a sponge, it will absorb water and moisture into pores and cause irreparable cracking. Plus the freezing temperatures are also not very much help to prevent it from cracking.