Exterior Inspection Section#2 Exterior Cladding Quiz#2

You should have finished Study Session 1 and Quick Quiz 1 before starting this Study Session. This Study Session deals with stucco and exterior insulation and finish systems (EIFS). The estimated completion time is 60 minutes. Objectives At the end of this Study Session, you should be able to: List the three main components of stucco. List five common stucco problems. List five differences between conventional and synthetic stucco. List three main causes of problems with synthetic stucco. Explain in one sentence each the meaning of the terms rain screen and drain screen. Question 1 Needs Grading Behind conventional stucco over wood frame construction, before you get to the sheathing, what would you likely find? Selected Answer: 1. Finish coat 2. Brown coat 3. Scratch (or base) coat 4. Metal lath 5. Waterproof building paper Correct Answer:   Waterproof building paper and metal lath. Response Feedback: [None Given] Question 2 Needs Grading Describe how you would determine whether stucco is over wood or masonry. Selected Answer: Tap on the stucco. There is a substantial difference between tapping on a masonry wall and on a wood-frame wall. Even with the stucco surfacing, this difference telegraphs clearly. Correct Answer:   Tap on the stucco. Wood frame structures sound hollow compared to masonry walls. Response Feedback: [None Given] Question 3 Needs Grading How can you differentiate between EIFS and conventional stucco in the field? Selected Answer: Tap it with knuckles. The foam backer board gives a sharp, hollow ring.  Correct Answer:   Tap on it. EIFS has a sharp, hollow ring. Conventional stucco produces a dull thud. Response Feedback: [None Given] Question 4 Needs Grading List five areas on the interior to check for. Selected Answer: 1. Stains on walls and floors, and ceilings 2. Rusting carpet tack strip. (Note: pulling back broadloom goes beyond the Standards) 3. Peeling paint 4. Damaged flooring (warped hardwood) 5. Elevated moisture levels in drywall, and/or subflooring. Correct Answer:   Stains on walls, floors and ceilings Rusting or rotting carpet tack strip Peeling paint Damaged flooring Elevated moisture levels in drywall or subflooring Response Feedback: [None Given] Question 5 Needs Grading List five common problems with conventional stucco. Selected Answer: 1. Cracks, crumblings, loose or bulging 2. Incompatible flashings 3. Mechanical damage 4. Rusted lath or trim 5. No drip screed Correct Answer:   Cracks, crumbling, loose or bulging Incompatible flashings Mechanical damage Rusted lath or trim No drip screed Response Feedback: [None Given] Question 6 Needs Grading List five ways in which synthetic stucco is different than conventional stucco. Selected Answer: 1. EIFS typically has an insulation board, usually expanded polystyrene, glued or fastened to a plywood or oriented strand board (OSB) exterior sheathings. Gypsum board sheathing has been used, but it is less common and its performance has been suspect. 2. Most installations have neither building paper nor housewrap behind the stucco or behind the insulation. 3. The base coat is not a typical Portland cement, aggregate, water mix, but is a polymer-based cement. It is typically 1/16 to 1/4 inch thick. 4. Metal reinforcement (wire lath) is not used. A coated fiberglass fabric mesh is embedded in the base coat. 5. The finish coat is an acrylic-based material which is typically only about 1/16 inch thick. It comes in various colors and textures like conventional stucco. 6. EIFS is flexible. Traditional stucco is brittle.  Correct Answer: EIFS typically has insulation board Most EIFS installations have neither building paper nor housewrap The base coat is polymer based, not cement based Metal reinforcement is not used The finish coat is acrylic based, and very thin. EIFS is more flexible than traditional stucco. Response Feedback: [None Given] Question 7 Needs Grading List four common components of an EIFS wall assembly applied on the outside of the studs. Start with the innermost material. Selected Answer: 1. A sheathing such as plywood, OSB or gypsum board. 2. Plastic foam insulation boards (usually expanded polystyrene) adhered or fastened to the substrate 3. Base coat (1/16 inch to 1/4 inch thick) 4. Finish coat Correct Answer:   Expanded polystyrene insulation Base coat Glass fibre reinforcing mesh Finish coat Response Feedback: [None Given] Question 8 Needs Grading List four possible components to an EIFS test. Selected Answer: 1. Scanner 2. Moisture meter 3. Siding removal 4. Report Correct Answer:   Scan for moisture Probe wet areas Remove siding Write report Response Feedback: [None Given] Question 9 Needs Grading List six factors that may suggest concealed problems with an EIFS application. Selected Answer: 1. High rain area 2. Building is exposed to strong winds 3. No or very small roof overhand 4. Caulking is poor 5. Attention to detail at openings are poor 6. The stucco surface is not vertical Correct Answer:   High wind exposure High rainfall area Small or no overhang Lots of penetrations Attention to detail at openings is poor Horizontal stucco surfaces Poor caulking maintenance Response Feedback: [None Given] Question 10 Needs Grading List ten areas outside to check for. Selected Answer: 1. Exposure 2. Roof/wall connections 3. Gutters, especially end caps against walls 4. Chimneys, including chases that surrounded metal chimney 5. Door and window openings 6. Openings for electrical conduits 7. Vent openings for fans 8. Railing and deck connections 9. Cracks, bulges 10. Evidence of repairs Correct Answer: Exposure Roof/wall connections Gutters Chimneys Door and window openings Openings for electrical conduits, lights, cable TV lines, refrigeration piping, hose bibbs, etc Vent openings Railing and deck connections Cracks, bulges, peeling, fungus, exposed reinforcing mesh or trim Evidence of repairs. Response Feedback: [None Given] Question 11 Needs Grading List three causes of problems that are unique to EIFS. Selected Answer: 1. Lack of building paper acting as a backup moisture barrier 2. No drainage plane 3. Poor drying potential Correct Answer:   Lack of building paper No drainage plane Poor drying potential Response Feedback: [None Given] Question 12 Needs Grading List three functions of a drip screed. Selected Answer: 1. Provides a finished edge 2. Allows drainage 3. Prevents water from being drawn up into the wall Correct Answer:   Provides a finished edge Allows drainage Prevents water from being drawn up into the wall. Response Feedback: [None Given] Question 13 Needs Grading List two areas in basements and crawlspaces to look for with respect to problems on EIFS installations. Selected Answer: 1. Mold, mildew or rot on joists, sills, rim joists and subflooring 2. Stains on foundations coming from sill area Correct Answer:   Mold, mildew or rot on joists, sills, rim joists and subflooring Stains on foundations coming from sill area Response Feedback: [None Given] Question 14 Needs Grading Stucco is made up of _____, _____, and _____. Selected Answer: cement, aggregate, water Correct Answer:   Cement, aggregate and water Response Feedback: [None Given] Question 15 Needs Grading What are the names of the three layers of a conventional stucco coat? Selected Answer: 1, Finish coat 2. Brown coat 3. Base coat Correct Answer:   Scratch or base coat Brown coat Finish coat Response Feedback: [None Given] Question 16 Needs Grading What does stucco over masonry not require, assuming that the masonry surface is rough enough? Selected Answer: No building paper or lath is required Correct Answer:   Building paper or lath Response Feedback: [None Given] Question 17 Needs Grading What is a kickout? Selected Answer: Kickout is a metal piece at the bottom of roof/wall intersections to prevents siding/wall damage Correct Answer:   A flashing used where a wall extends beyond a roof, to shed roof water away from the stucco. Response Feedback: [None Given] Question 18 Needs Grading What is meant by backwrapping? Selected Answer: Backwraping reinforces mesh around edges of foam board at ends and openings Correct Answer:   Backwrapping is when the glass fibre reinforcing mesh is wrapped around the edges of the insulation at the ends and openings. Response Feedback: [None Given] Question 19 Needs Grading What is the problem that people are experiencing with EIFS? Selected Answer: concealed water damage to building Correct Answer:   Water is getting into the wall system at penetrations and causing structural damage. Response Feedback: [None Given] Question 20 Needs Grading What is the problem with having aluminum in contact with stucco? Selected Answer: Aluminum will corrode if directly in contact with stucco Correct Answer:   It oxidizes (deteriorates). Response Feedback: [None Given] Question 21 Needs Grading What is the single largest component of stucco? Selected Answer: Building paper or lath Correct Answer:   Aggregate (clean sand) Response Feedback: [None Given] Question 22 0 out of 0 points Stucco is similar to _____, which is used on the inside of buildings. Selected Answer:  concrete Correct Answer: Evaluation Method Correct Answer Case Sensitivity Exact Match plaster Response Feedback: That's incorrect. Question 23 0 out of 0 points How thick should a three-layer stucco coat be? Selected Answer:   7/8 inch Answers: 1/8 inch 3/8 inch 5/8 inch   7/8 inch Response Feedback: Good work!! Question 24 0 out of 0 points How thick should a two-layer stucco coat be? Selected Answer:   5/8 inch Answers: 1/8 inch 3/8 inch   5/8 inch 7/8 inch Response Feedback: Good work!! Question 25 0 out of 0 points Is conventional stucco more like a drain screen or a rain screen? Selected Answer:   drain screen Answers:   drain screen rain screen Response Feedback: Good work!!