STEEL STUD DESIGN GUIDE VAPOR / DEW POINT ANALYSIS

Transcription

1 *PATENT # * INSULATED DRAINAGE BOARD STEEL STUD DESIGN GUIDE VAPOR / DEW POINT ANALYSIS

2 TYPICAL VENEER WALL DEW POINT ANALYSIS BRICK VENEER / STEEL STUD WALL (PRIOR TO 8/02 CSI ARTICLE) R-19 BATT INSULATION 15# BUILDING PAPER 1/2 DRYWALL 6 STEEL STUDS 1/2 DRYWALL 2 AIRSPACE 3 5/8 BRICK APPARENT R-VALUE ABOUT ACTUAL R-VALUE* *TAKING INTO ACCOUNT STEEL STUD THERMAL SHORTING AND ASHRAE 90.1 CORRECTION FACTORS OVER ONE OUNCE OF CONDENSATION OCCURS WITHIN WALL PER DAY! NOTICE: This calculation is based on the theory of Water Vapor Migration presented in the ASHRAE 1993 Fundamentals Handbook. Actual performance may vary depending on air infiltration, workmanship, and building materials. Since the information is provided without charge, The Dow Chemical Company assumes no obligation or liability for its use.

3 THERMADRAIN DEW POINT ANALYSIS BRICK VENEER / THERMADRAIN / STEEL STUD WALL 6 STEEL STUDS 1/2 DENS GLAS GOLD HOUSEWRAP OR TYVEK BETWEEN DENS GLAS AND THERMADRAIN 1/2 DRYWALL 2 THERMADRAIN 5/8 TOLERANCE SPACE 3 5/8 BRICK R-VALUE OF WALL* NO CONDENSATION WITHIN WALL NOTICE: This calculation is based on the theory of Water Vapor Migration presented in the ASHRAE 1993 Fundamentals Handbook. Actual performance may vary depending on air infiltration, workmanship, and building materials. Since the information is provided without charge, The Dow Chemical Company assumes no obligation or liability for its use.

4 THERMADRAIN DEW POINT ANALYSIS THERMADRAIN CAVITY WALL 3 R-VALUE /8 BRICK 7 5/8 CMU 2 THERMADRAIN WITH POLYISOCYANURATE (DOW SUPER TUFF R-C) - 2 INSULATION - 3/8 DRAINAGE MAT 2 3/8 TOTAL THICKNESS 5/8 TOLERANCE/ ANCHOR SPACE 1/4 OVERHANG R-Value of wall using Thermadrain with Dow Super Tuff R-C 1 1/ / R-Value of wall using Thermadrain with Dow Styrofoam* 1 1/ / NO CONDENSATION WITHIN WALL NOTICE: This calculation is based on the theory of Water Vapor Migration presented in the ASHRAE 1993 Fundamentals Handbook. Actual performance may vary depending on air infiltration, workmanship, and building materials. Since the information is provided without charge, The Dow Chemical Company assumes no obligation or liability for its use.

5 CAVITY CUT BEAD OF FOAM 5/8 DRYWALL FLUSH CUT 4 X 8 SQUARE SHEETS OF THERMADRAIN EDGE BUTTED ; PERIMETER JOINTS PRESSED INTO A BEAD OF LOW-RISE FOAM (GREAT STUFF BY DOW) ANCHORS 1 HOHMANN BARNARD X - PER 2.67 FT 2 OF WALLAREA WITH LEG OF 2, 2 1/2 OR 3 1/2 OR 1 HECKMANN WING NUT POSITIE WITH BARREL PER 2.67 FT 2 OF WALLAREA WITH 1 1/2, 2, 3 OR 3 1/2 DEEP BARRELSCREW (HOTDIPPED) OR 1 WIRE-BOND HCL-711 PER 2.67 FT 2 OF WALLAREA WITH 1 1/2, 2, 2 1/2 OR 3 PLATE LEGS (THERMADRAIN MUST BE CAVITY CUT 16 X 96 WHEN USING THIS TIE) 5/8 TOLERANCE / ANCHOR INSTALLATION SPACE SELF ADHESIVE FLASHING & S.S. DRIP EDGE BY IPCO OPEN CELL VENT IN HEAD JOINT ON TOP OF FLASHING, RECESSED TO TOUCH 2 O O.C. STEEL 16 O.C. 1/2" X 4 X 8 SHEETS OF DENS GLAS GOLD NO BATT INSULATION (COULD SUPPORT MOLD / MILDEW) (SEE THER- MADRAIN DEW POINT ANALYSIS BROCHURE) CLAY BRICK - ASTM C216 TYPE FBS, GRADE SW STYROFOAM WEATHERMATE PLUS HOUSEWRAP BY DOW, OR TYVEK, SHIPLAPPED OVER FLASHING AND SHEETING (BETWEEN THE DENS GLAS AND THER- MADRAIN) THERMADRAIN WITH DOW SUPER TUFF R-C / THERMAX ACTUAL THICKNESS WALL R-VALUE WITH DOW SUPER TUFF R-C / THERMAX 1 THERMADRAIN 1 3/8 R = /2 THERMADRAIN 1 7/8 R = THERMADRAIN 2 3/8 R = /2 THERMADRAIN 2 7/8 R = THERMADRAIN 3 3/8" R = /2 THERMADRAIN 3 7/8" R = THERMADRAIN WITH DOW EXTRUDED POLYSTYRENE ACTUAL THICKNESS WALL R-VALUE WITH DOW EXTRUDED POLYSTYRENE 1 1/2 THERMADRAIN 1 7/8 R = THERMADRAIN 2 3/8 R = /2 THERMADRAIN 2 7/8 R = THERMADRAIN 3 3/8" R = 19.34

6 SECTION AT LINTEL 5/8" DRYWALL 4' x 8' SQUARE SHEETS OF THERMADRAIN EDGE BUTTED; PERIMETER JOINTS PRESSED INTO A BEAD OF MASTIC, NP1, OR GREAT STUFF BY DOW (LOW RISE) 1/2" X 4' X 8' SHEETS OF DENS GLAS GOLD STYROFOAM WEATHERMATE PLUS HOUSEWRAP BY DOW, OR TYVEK, SHIPLAPPED OVER FLASHING AND SHEETING (BETWEEN THE DENS GLAS AND THERMADRAIN) ThermaDrain Insulated Drainage Board 423 Joseph Drive South Elgin, IL (fax) DEWPOINTYELLOW.QXD REVISED