Sometimes a favorite primer develops bubbles.

There are several reasons this result may occur–trapped moisture, for example.

Not in this case: under the primer are old roof coatings, containing trapped gaseous particles that expand in the sunlight.

There is no one magic primer that will work on every tin roof.

applied by Roof Menders, Inc, of Conshohocken, PA
610-941-1051
Over 150 tin roofing mini-articles
(In PA, R.Menders Inc )
(c) Copyright 2014