Exam 29: Exterior Wall Cladding-III Stucco, Adhered Veneer, Eifs, Natural Stone, and Insulated Metal Panels

The lath in stucco, applied on a stud wall, must be backed by a water resistant layer-typically two layers of No. 15 roofing felt or one layer of No. 30 roofing felt. The assembly also requires an air- weather barrier (AWB). Explain why the roofing felt cannot function as an AWB in addition to providing water resistance. Which material is used as an AWB with stucco?

In an insulated wall metal panel, the insulation is sandwiched between

The dead- load supports for each stone slab (in a stone- clad wall)are generally

Which type of sheathing is used to accept stucco backed by: (i)wood stud assembly and (ii)cold- formed steel (CFS)stud assembly?

Which wall cladding system can look indistinguishable from stucco after completion? Which features in the two finished walls can help distinguish between them easily?

In PB EIFS cladding, EPS insulation is adhered to the substrate, and subsequently EIFS lamina is constructed. What must be done before the construction of EIFS lamina?

EIFS industry divides EIFS systems in two classes. Name them and identify the one that is commonly used.

In an adhered masonry veneer, the most commonly used masonry unit is

With the help of a sketch, illustrate the anatomy of PB EIFS. Also, explain what backwrapping is and where it is used in EIFS cladding.

Does a PB EIFS cladding need expansion joints? Explain.

In addition to water, a stucco base coat mix consists of

In PB EIFS, the insulation commonly used is

In a stone- honeycomb wall cladding panel, the thickness of the stone is approximately

Why are expansion joints required on a stucco wall?

What is stucco?

What are the general guidelines for providing control joints in stucco applied on stud walls?

EIFS is classified into two categories: polymer- based (PB)EIFS and polymer- modified (PM)EIFS. Which of these two is more commonly used?

On a stud wall, the stucco is applied in three coats: scratch coat, brown coat and finish coat. Some stucco material manufacturers require a primer to be used before the application of the finish coat. What is the purpose of the primer (also called prime coat), how thick is it, and is the final color of stucco in the finish coat, in the primer, or in both?

Explain the anatomy of a stone- honeycomb panel. With the help of a sketch, explain how the panels are anchored to a backup wall.

Stucco surface, made of Portland cement and sand mix, shrinks on gaining strength, introducing tensile stress in it. Therefore, it is reinforced with metal lath, when used on a (wood or steel)stud wall, to resist the tensile stress. Why is a lath not required when stucco is applied on a CMU or reinforced concrete wall?