Core TradesQuestion 107 of 700
Counter flashing at a chimney is installed so that its top edge is embedded in or tucked into a mortar joint of the masonry, MAINLY to:
a.Cover the top of the base flashing and shed water over it so no water gets behind the flashing
b.Hold the chimney together
c.Provide a decorative trim only
d.Support the roof deck
Explanation
Counter flashing tucks into the masonry and laps over the base flashing so runoff sheds outward and cannot get behind the flashing where the base flashing turns up the chimney. It does not structurally hold the chimney, act as mere decoration, or support the deck.
Law Reference: 2025 CA Building Code, Chapter 15 (Roof Assemblies)Practice all 700 questions free — no signup required.
Related questions on this topic
- Where a sloped shingle roof meets a vertical sidewall, the correct flashing method is:
- On a low-slope shingle roof, underlayment courses must be lapped so water sheds over each lower course. The MAIN reason for the larger head and side laps on low slopes is:
- Asphalt shingles are blowing off in high winds shortly after installation. The MOST likely installation error is:
- CALCULATION: Roofing is estimated in squares (1 square = 100 square feet). A gable roof has two rectangular planes, each 40 feet by 25 feet. How many squares of roofing are needed, before waste?
- In cold climates, an ice barrier (self-adhering membrane) is applied at the eaves of a shingle roof MAINLY to:
- Proper sequencing of roof components requires that water always flows over, not under, the layer below. Therefore drip edge at the eave and underlayment should be arranged so that:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB General Building (B) Trade Examination · How we review