Chapter 16 Exterior Wall Finish - PowerPoint Presentation

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Chapter

16

Exterior Wall FinishSlide3

Identify the parts of a cornice and rake.

Describe cornice and rake construction.Illustrate approved methods of flashing installation.Describe how wood siding and shingles are applied.Estimate the amount of siding or shingles required for a specific structure.

Objectives

Shakertown Corp.Slide4

Discuss the proper application of wood bevel siding.

Discuss the proper application of fiber-cement siding.List the most common siding choices and their characteristics.Discuss exterior insulation and finish systems (EIFS) and their application.Describe the tools and materials used when finishing veneer walls.

Objectives (Cont.)

Pacific International Tool and ShearSlide5

Cornice Designs and

TermsCornices are parts that enclose or finish off overhang of roof at eavesBox cornice

Open cornice

Snub cornice

Wood Frame House Construction, U.S. Dept. of AgricultureSlide6

Parts of Cornice

and Rake SectionFascia is main trim memberSoffit

is sheet material applied between wall and fascia board

Frieze is placed flat against wall below soffit

Rake is part of roof that overhangs gable endSlide7

Cornice and Rake Construction

Corners of fascia boards should be miteredRake should be made to match corniceMost construction makes use of truss rafters

Soffits remain at same height as interior ceilingsSlide8

Prefabricated Cornice Materials

May consist of 3/8″ laminated, wood-fiber panelsMay have factory-applied screened vents

Metal soffit material comes in rolls and sheets in several widthsSlide9

With gable roofs, wall surface material is applied before lower section is covered

Scaffolding can be directly attached to wall while siding gable endExterior trim should be primed as soon as possible after installationWall FinishSlide10

Wall Sheathing

and FlashingSiding can be nailed directly to sheathing materialInsulation board may be used in place of sheathingInstall flashing where required around openings

Amoco Foam Products Co.Slide11

Pro Tip

Structural frame and sheathing should be dry before applying siding materialIf it is not, drying and shrinkage will likely cause siding to buckleSlide12

Horizontal Wood Siding

Applied over a base of sheathing and housewrapBevel siding is most commonly used

Channel rustic siding has shiplap-type joints

Drop siding usually has tongue-and-groove jointsSlide13

Installation Procedures

Plain beveled sidingLapped to shed waterWindproof coveringDustproof covering

With lap siding, advantage is being able to vary exposureSlide14

Wood Corner Boards

Square piece of solid lumber can be used for inside cornersOutside corners can be formed with two pieces of trim lumberCorners can be formed with metal piecesSlide15

Nailing

Use noncorrosive nails for sidingFace nail horizontal siding to each studFor narrow siding, place nail 1/2″

above butt edge

For wide bevel siding, drive nail through butt edge 1

″

above lapSlide16

Wide range of finishing materials available

Clear water repellentsBleaching oilsStainsPaintsFor paint, apply priming coatApply first topcoat of paint within two weeks of applying primer

Painting

and MaintenanceSlide17

Estimating Siding

Increase footage for difference between nominal and finished sizesAdd more for waste and overlapsCalculate area of gable ends Multiply height above eaves by width

Divide by twoSlide18

Vertical Siding

Used for entrances or gable ends and for main wall areasBoard-and-batten siding is designed around wide, square-edged boardsCorner boards not used

APA-The Engineered Wood AssociationSlide19

Wood Shingles

Sometimes used for wall coveringsVery durable and can be applied in various waysMost shingles are made in random widthsDimension shingles have uniform width

Shakertown Corp.Slide20

Single coursing

Similar to applying wood shingles to roofsGreater weather exposure is allowedDouble coursing Uses second layer over first layerButt lines should be even with upper edges of window openings

Applying

Shingles

to SidewallsSlide21

Single Coursing

of SidewallsMuch like roof applicationMajor difference is in exposures usedTwo-ply covering of shingles is usually adequate

Concealed nailing should be usedSlide22

Calculate areas

to be shingled in square feetDeduct window and door areasConsult appropriate table

Estimating QuantitiesSlide23

Low-cost shingle usually used for bottom layer

Most procedures used for regular siding can be followedIn staggered coursing, butts of alternating shingles are offset below lineIn ribbon coursing, both layers are oriented in straight lineDouble Coursing of SidewallsSlide24

Shingle and Shake Panels

Consist of two courses of individual shingles bonded to backingStandard length panels are 8′

Applied with same basic procedures as for regular shingles

Shakertown Corp.Slide25

Wood Shingles over

Old SidingApply building paper or housewrap over wallAttach furring using spacing that matches spacing of shinglesAdd new molding strips around window and door casingsSlide26

Plywood Siding

Must be made from exterior-type plywoodPanels come in sanded condition or with sealer or stainApply long dimension in vertical position

APA-The Engineered Wood AssociationSlide27

Fiber-Cement Siding

Used in new homes more than any other siding productMade of portland cement, sand, and cellulose fibersAvailable in several textures and colorsSlide28

Cutting Fiber-Cement Siding

Can be cut with circular saw with special bladeCan be snapped on scored lineCan be cut with shears

Pacific International Tool and ShearSlide29

Exposure to dust when cutting fiber-cement siding materials can cause silicosis

Wear dust mask or respirator when cuttingComplete sawing or cutting outdoors Ask workers in immediate vicinity to wear dust masksSafety NoteSlide30

Fiber-Cement Siding

Can be installed onto braced studs, plywood, or OSB panelsMust be properly flashed to keep out moistureAsphalt-saturated felt can be used to flash end jointsSlide31

Nailing Fiber-Cement Products

© 2014 James Hardie Building Products Inc. Used with permission. All rights reserved.Slide32

Should match siding colors and textures

Trim will have same durability as sidingEasy to fasten with pneumatic nail gunBoards are available in widths comparable to wood trim boardsSoffit material is available in vented and unvented styles

Fiber-Cement Trim

and SoffitSlide33

Vinyl Siding

Made from rigid polyvinyl chloride compoundCan resemble wood drop siding and shiplapThree types of cutsShort

Low volume

LongSlide34

Installing Vinyl Siding

No special preparation on new walls is neededTrim for vinyl-sided buildings is often aluminumTop course requires special trim and panel preparationCorner posts are installed after starter stripsSlide35

New vinyl siding is often installed without removing old siding

Windowsills, heads, and casings are usually clad with aluminumFurring strips may be installed to ensure smooth surfaceRe-Siding over Old Siding

Benjamin Obdyke, Inc.Slide36

Panels are sold by square (100 sq. ft.)

Find area of one side and one end wallAdd areas and multiply by two to get total areaSubtract areas of openingsAdd 10% for wasteDivide by 100 to find squares needed

Estimating

Aluminum and

Vinyl SidingSlide37

Stucco

May be tinted or surface may be paintedApplied over concrete block, wood sheathing, or cement boardBuilding paper, roofing felt, or housewrap and metal lath are used as substrateSlide38

Construction Details for StuccoSlide39

Pro Tip

Once stucco is applied, keep wet for three daysNever apply stucco in temperatures below 40°F (5°C)Stucco needs warm temperatures for curingSlide40

Similar in appearance to stucco

Offer high R-values, low maintenance, design flexibility, and variety of colorsEither polymer based (PB) or polymer modified (PM)Drain away any water penetration before it can cause structural damageExterior Insulation and

Finish SystemsSlide41

Soft-Coat Systems

Soft-coat systems (PB type)Typically thin (1/8″)

Flexible

Attached with adhesivesSlide42

Hard-coat systems (PM type)

Thicker than soft-coat systemsMechanically attached

Systems may use grooves in insulation board to channel moisture

Hard-Coat SystemsSlide43

EIFS Substrate

Exterior insulation finish system can be installed overGypsum sheathingGlass mat-reinforced gypsumPlywood

Oriented strand board

Concrete or concrete blockSlide44

Not all redundancy is wasteful

Even carefully built sealing systems will have flawsUse extra barriers and sealing in common leaky areasThinking GreenSlide45

Brick or Stone Veneer

Veneer wall is framed in wood or metal and stone, brick, or concrete block is attachedWeight of veneer is supported directly by foundation

APA-The Engineered Wood AssociationSlide46

Brick Tools

Trowel is most-used toolMason usually has two kinds of rules6′

folding rule

Steel tape

Jointers, brick hammers, chisels, and mason’s line are also used

SkillsUSASlide47

Masonry Materials

Bricks made from clay or shale in various sizesMortar bonds bricks and blocks into strong, waterproof wallsCorrosion-resistant metal ties secure veneer to frameworkSlide48

Shutters

Frame assemblies with solid panels or louversAttached to exterior wall with screws or hingesPurely decorative in most casesFunctional in areas with common bad weather