Flat Casing for a Nail Fin Window Installation

Miter Joint

Nail Fin Flat Casing Instructions

• Install window per AAMA 2400-10 installation standard.

• Read instructions from beginning to end before assembling or installing Flat Casing.

• Flat Casing is not compatible with other Milgard Window or Door offerings.

• Do not use Flat Casing on other manufacturers’ products.

• Window or Door must be properly installed and flashed prior to Flat Casing installation.

• Milgard Nail Fin Flat Casing does not provide structural support or function as a water barrier.

For Milgard Essence® Windows and Doors

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Nail Fin Flat Casing Parts

Part Description Part #

1 #8 – 5/8” Flat Head SS Screw FA0442

2 Trim Clip – Window HA7826

3 (Window Frame) Varies

4 Sill Nose EX7919

5 End Cap – Sill Nose – Right IM7974

6 End Cap – Sill Nose – Left IM7975

7 Secondary Sill Key IM7971

8 Flat Casing – Leg – Left EX7817

9 Flat Casing – Header EX7817

10 Flat Casing – Leg – Right EX7817

11 Corner Key IM7964

Flat Casing All Sides Flat Casing with Sill Nose

Part Description Part #

1 #8 – 5/8” Flat Head SS Screw FA0442

2 Trim Clip – Window HA7826

3 (Window Frame) Varies

4 Flat Casing – Leg EX7817

5 Flat Casing – Header/Sill EX7817

6 Corner Key IM7964

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Nail Fin Flat Casing Corners Top Miter

Front / Back

Bottom Miter Back / Front

Bottom Sill Nose Flush Back / Front

Bottom Sill Nose Horn Back / Front

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Special Instructions for:

• Install window per AAMA 2400-10 installation standard.

• Milgard provides Shape and Radius Flat Casing clipped to Window Frame.

• Remove trim through gently pulling on any corner.

• Skip to Step 15 for Trim Installation.

Shape and Radius Windows

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Corner Key Assembly

1 Determine Header, Sill, and Leg Trim Pieces.

Skip to Step 14 if Installing Factory Assembled Flat Casing.

2 Insert Corner Keys into Flat Casing miter ends.

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Note: There are two Corner Keys per Miter Corner.

Corner Key Assembly Cont.

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3 Start #8 x 5/8” Flat Head Screw into one hole. Repeat for all Corner Keys. Tighten screw halfway.

Sill End Cap Assembly

4 Caulk inside of Sill Nose on Both Ends.

Skip to Step 11 for Flat Casing on all sides.

5 Seat End Caps into Sill Nose.

Before / After

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Sill Nose Horn Modification

6 Remove Screw Boss from End Cap. Score both Sides and Snap.

Skip to Step 8 for Sill Nose without Horns.

CAUTION!: Only do this step for Sill Nose Horns.

7 Insert first Secondary Sill Key against edge of End cap. Place second Secondary Sill Key 2” apart on center. Go to Step 9.

Repeat Step 6 for other end of Sill Nose.

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2”

Sill Nose Horn Modification Cont.

8 Place Secondary Sill Key two inches from first key.

10

2”

Note: Leg Trim will align Secondary Sill Keys in correct locations.

Flat Casing Assembly

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9 Lay out Flat Casing outside face down on a flat surface.

10 Fit joints together.

Note: It is possible to make a Flush or a Horn Joint with the same parts. Make sure the Sill Nose has

the correct Joints before moving onto Step 11.

Install Screws

11 Locate all Screw Holes. With Screw halfway tightened, Rotate Screw Head with tool until second Corner Key Screw Hole appears.

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12 Inject Caulk into Corner Keys (half a squeeze into one hole per Corner Key).

Install Screws Cont.

Sill Nose: Tighten screws until flush with Flat Casing.

Sill Nose Horn: Make sure Secondary Sill Key is against End Cap. Tighten screw until flush with Flat Casing.

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Note: Sill Joint may have an extra hole on the back of the Flat Casing Legs. The open holes allow different Joint types. There are no missing parts.

13 Install #8 x 5/8” Flat Head Screws.

Miter Corners: Start screw into second hole and tighten until head is flush with Flat Casing. Finish tightening first Screw.

Trim Clip Attachment 14 Install Trim Clips onto Window Frame.

1.5”

Space Trim Clip 1.5” away from

Corner. Tap two Trim Clips into

each corner.

If length of window side is 47" or longer, tap additional trim clip midway between two corner clips.

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If installing Flat Casing with Sill Nose, do not place Trim Clips on Window Sill Accessory Groove.

Trim Installation

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15

Apply 1/4" diameter 2" long beads of sealant to back of Flat Casing. Space Beads 18" apart.

16 Place clear or color matched sealant into accessory groove along full length of Window Frame Sill.

Trim Installation Continued

17 Push Flat Casing onto Window Frame until it seats fully.

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If installing Flat Casing with Sill Nose, slide Sill Nose Lip into Window Frame Accessory Groove.

Clean Up

• Wipe up any excess caulk.

• TiteBond® WeatherMaster Sealant compatible colors.

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Essence Accessories Sealant

Milgard Color Milgard TiteBond P/N TiteBond Color

Bark SE7673AR 44061 Bronze

Black Bean SE7673BL 44031 Black

Cinnamon SE7673CI 45521 Red

Classic Brown SE7673LW 44211 Brown

Clear SE7673CL 43991 Clear

Evening Sky SE7673ES 45531 Blue

Fern SE7673FN 45651 Green

Fog SE7673FO 46681 Gray

Frost SE7673FS 44001 White

Harmony SE7673HR 44641 Clay

Natural Crème SE7673NT 45511 Poplar White

Pea Pod SE7673PP 49211 Green

Pebble SE7673PE 46811 Gray

Rattan SE7673RA 46081 Beige

Tweed SE7673TE 44691 Clay

Twilight SE7673BL 44031 Black

LA7915MM