Insufficient Underlayment

The Ontario Building Code only requires underlayment installation up to the eaves of your roof and in the roof valleys. Thus, for many homes today that were constructed by the builder, there will be areas where shingles have been applied directly onto the roof sheathing or roof deck.  This puts your roof at greater risk of leaks, especially when wind-driven rains occur. At McKay’s we install at least 2 rows of Ice and Water Shield at the eaves and in valleys and full underlayment over your entire roof deck so that your home won’t have these problems.