ADU Roof Replacement in The Knolls

That symptom is the opposite of a leak, and it is the most useful thing you can tell us. Warm moist air from a new room hits a cold uninsulated deck and condenses. It shows up in dry cold weather because that is when the deck is coldest. The fix is insulation and ventilation, not sealant.

Not always required, but it is much cheaper before the ceiling is lined, because everything can be done from below. Once it is lined the same work is a roof job from above. If the conversion is going in anyway, the roofing decision belongs at the start of the 60-day review, not after it.

You can, and on a parcel with several structures it is often the right answer, because each structure has its own 50% test. What nobody volunteers is that the fixed costs -- permit, mobilization, waste, a crew day -- do not shrink. Phasing one house roof over two years usually costs more than doing it once.

Usually yes, and not for the reason people expect. A garage roof has no insulation and minimal ventilation because neither mattered over a car. Put a bedroom under it and you get condensation that behaves exactly like a leak. Doing it before the ceiling is lined is much cheaper than after.

Not on a pitched roof here. The steep-slope cool-roof requirement applies in Title 24 climate zones 10 to 15, and El Monte is in zone 9. Low slope is different -- an aged SRI of 75 applies in all sixteen zones once you replace 50% or more of the roof area in a rolling year. Anyone telling you a pitched El Monte roof must be a cool roof is quoting the wrong zone.