Why garages leak differently
- Lower pitch holds snow longer
- Step flashing at the house wall is critical
- Unconditioned garage attics behave differently than living-space attics
- Gutters between house and garage get buried in ice
Scope house and garage together
Matching shingles and flashing details looks better and avoids two mobilizations.
If only the garage is failing, we still inspect the shared wall and kick-out so a patch does not push water into the house.
What appears on the proposal
Separate line items for garage vs main roof when sizes differ, plus shared-wall flashing called out clearly.
Low-slope sections may need different underlayment — we note that in writing.