I have been having trouble installing rubberized asphalt flashing in cold weather. The flashing does not appear to adhere properly to masonry and concrete surfaces. In particular, I am having problems bonding the rubberized asphalts to concrete when the ambient temperature is below 50 degrees F. What can be done to avoid this problem?
Rubberized asphalt flashing does not adhere very well at low temperatures. Many manufacturers provide different concrete conditioners that may help improve the bond to concrete during cold weather. It may be possible to heat the surface to which the asphalt will be applied and to heat the flashing material itself. This, in conjunction with the use of surface conditioners, may provide a suitable solution to the problem. The manufacturer should be consulted to determine what method or methods should be used in any particular application.