I think they typically like min of 40. But also the entire week has to be consistent in the 40’s and rising because it’s cost a lot for the actual asphalt plant to be running so they don’t just open and close on a daily basis. They need to have orders. And on that subject concrete is also tough to place in cold temps slowing down a lot of construction but concrete actually produces it’s own heat during curing and blankets can keep that work going thru winter but asphalt is what a majority of our roads are made of here in PA.