Traditional Portland cement plaster (stucco) is a time-tested
exterior finish. It consists of Portland cement-based materials and
sand, mixed with water to form a workable plaster. Portland cement,
the same material that is the basis for the hardened properties of
concrete used to build super-highways, bridges, and skyscrapers
provides strength, durability, and toughness in Portland cement
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Traditional stucco is a proven system that works in all climates.
Portland cement plaster is applied either by hand or machine to
exterior and interior wall surfaces in two or three coats. It may be
applied directly to a solid base such as masonry or concrete walls,
or it can be applied to a metal lath attached to frame construction,
solid masonry, or concrete construction. Applied directly to
concrete masonry, Portland cement plaster provides a tough 1/2-inch
thick facing that is integrally bonded with the masonry substrate.
When applied to metal lath, three coats of plaster form a 7/8-inch
total thickness. A vapor-permeable, water-resistant building paper
separates the plaster and lath from water sensitive sheathing or
framing. Portland cement plaster has high impact resistance, sheds
water, but breaths, allowing water vapor to escape. It’s a proven
system that works in all climates.
Traditional Stucco Is Strong And Beautiful
Traditional Portland cement stucco provides a tough exterior that
resists attack from woodpeckers to weed whackers. That inherent
toughness is beautifully complemented by the variety of colors and
textures available. Appearance is an important consideration in
selecting a wall cladding. You can select a color and texture
consistent with the message and image you wish to convey.
Traditional stucco provides a strong, beautiful, low maintenance
Color is determined by selecting cement and aggregate color, and
quite often modified by adding mineral oxide pigments to the plaster
mix. In many areas, factory-prepared finish-coat products are
available. Pre-pigmented packaged cements also can be used to
achieve the desired stucco color or pre-weighed mineral oxide
pigments can be added to the finish coat stucco during mixing.
Texture is achieved by selecting aggregate size, controlling finish
mix consistency, and using special treatment techniques during and
after application of the finish coat plaster. Texture gives
substance and character to the plaster surface. It can be used to
provide highlights, depth, continuity, segmentation, and even
achieve the look of a completely different construction material
such as wood timbers, brick, or stone masonry construction. To
confirm the suitability of a desired color and texture, be sure to
ask your plasterer to provide a sample panel for evaluation prior to
Portland cement plaster has a well documented history of proven
performance in extreme climates from the desert southwest of
Arizona, to the severe winters of Minnesota, to the hot-humid
Florida summers. It performs in all climates.
That durability is complemented by its versatility. Portland cement
plaster provides an ideal finish or cladding for any building
construction system including concrete, concrete masonry, brick
masonry, wood frame, or steel frame. Portland cement stucco can be
applied to any flat or curved surface either inside or outside.
Information provided by the Portland Cement Association