To meet Section 8, titled Secondary Water Resistance (SWR), your home must have a
self adhering polymer modified bitumen roofing underlayment applied directly to the
sheathing. This would involve replacing your roof (See Section 2 & 3).
Tape Underlayment Spray Foam SWR Seal
Another, yet less commonly utilized way to meet the SWR Section is by having a foam
SWR applied as a secondary means to water intrusion. This involves spraying foam
at the point where the truss meets the roof deck. This is not hard to do but takes
some time and should be done by a licensed contractor.