Question 12

Asphalt shingles may not be installed over open or "skip" sheathing.

Asphalt shingles require a solid sheathing surface for proper installation and support, making them unsuitable for installation over open or "skip" sheathing.

A) wood shingles.

Wood shingles can be installed over open or "skip" sheathing because they allow for adequate airflow and can accommodate the natural expansion and contraction of the wood material without compromising the roof's integrity.

B) asphalt shingles.

Asphalt shingles are not appropriate for installation over open or "skip" sheathing as they require a solid, continuous surface to prevent water infiltration and to provide the necessary support for the shingles, which is not achievable with skip sheathing.

C) cedar shakes or shingles.

Cedar shakes or shingles are similar to wood shingles and can be installed over open or "skip" sheathing. Their design allows for adequate ventilation and drainage, making them compatible with this type of installation.

D) terra cotta or concrete tiles.

Terra cotta or concrete tiles can also be installed over skip sheathing when proper underlayment is used. These tiles are heavy and require a secure base, but they can be effectively mounted on skip sheathing if installed correctly with appropriate support.

Conclusion

Asphalt shingles are the only roofing material among the options that cannot be installed over open or "skip" sheathing due to their need for a solid substrate for proper functioning. In contrast, wood shingles, cedar shakes, and terra cotta or concrete tiles are compatible with this type of sheathing, making them viable options in roofing applications.