The Architect's Portable Handbook: First-Step Rules of Thumb for Building Design, Third Edition

NOTES
| Note | For EIFS, see p. 384. |

Exterior (stucco) of cement plaster.
Interior of gypsum plaster.
Wall supports usually studs at between 12 ? and 24 ? oc. If wood, use 16 ? oc min.
Full plaster 3 coats (scratch brown, and finish), but walls of masonry can have 1 or 2 coats.
Joints: Interior ceilings: 30 ? oc max.
Exterior walls/soffits: 10 ? to 20 ? oc.
Provide vents at dead air spaces ( ?/SF).
Curing: 48 hrs moist curing, 7 days between coats.
Costs:
| Ceilings with paint, plaster, and lath | $2.00 to $6.50/SF (25% M and 75% L), can vary up to +60% for plaster |
| Walls of stucco with paper-backed wire lath | $2.20/SF for stucco + $1.00/SF for lath (50% M and 50% L) |
Usually in 4 ? 8 ? (or 12 ?) sheets from ? to 1 ? thick in about ? ? increments.
Attach (nail or screw) against wood or metal framing usually at 16 ? (fire rating) to 24 ? oc.
Type "X", ? ? will give 1 hr. fire rating. Roughly each additional ? layer will give 1 hr. rating up to 4 hours, depending on backing and application.
Water-resistant (green) available for wet areas or exterior.

For exterior soffit venting, see p. 375.
Costs: