Flat Casing Nail Fin Door Installation...• Flat Casing is not compatible with other Milgard Window or Door offerings. • Do not use Flat Casing on other manufacturers’ products.

Flat Casing Nail Fin Door Installation

Nail Fin Flat Casing - Miter

Nail Fin Flat Casing Instructions

• Install Door per AAMA 2400-10 Installation standard.

• Read Instructions from beginning to end before assembling or installing Brickmould.

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

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

• 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 (Transom Frame) Varies

2 Trim Clip – Door HA7821

3 Flat Casing – Leg EX7817

4 Flat Casing – Header/Sill EX7817

5 #8 – 5/8” Flat Head SS Screw FA0442

6 Corner Key IM7964

Flat Casing All Sides on separate Transom


1 (Transom Frame) Varies

2 Trim Clip – Door HA7821

3 Sill Nose EX7819

4 End Cap – Sill Nose – Left IM7975

5 End Cap – Sill Nose – Right IM7974


7 Secondary Sill Key IM7971

8 Flat Casing – Left Leg EX7817

9 Flat Casing – Header EX7817

10 Flat Casing – Right Leg EX7817

11 Corner Key IM7964

Flat Casing with Sill Nose on separate Transom

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Nail Fin Flat Casing PartsFlat Casing on Door or Door with Transom Combination


1 (Door Frame) Varies

2 Trim Clip - Door HA7821

3 Door H-Clip HA7823

4 Mull Cover EX7825

5 Flat Casing – Left Leg EX7817

6 Flat Casing – Header EX7817

7 Flat Casing – Right Leg EX7817


9 End Plug MI7515

10 Corner Key IM7964

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Notes For Proper Installation

If siding will not be applied around Flat Casing, use HA8300CPML.HA8300CPML provides a more permanent connection. Trim is difficultto remove if using HA8300CPML.

Flat Casing lip rests on the face of the frame.

Flat Casing lip does not rest inside the accessory groove.

HA8300CPML

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Nail Fin Flat Casing Corners

Top MiterFront / Back

Bottom FlushBack / Front

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Nail Fin Flat Casing Corners Transom

Bottom Miter (Separate Transom)Back / Front

Bottom Sill Nose Horn (Separate Transom)Back / Front

Bottom Sill Nose Flush (Separate Transom)Back / Front

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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.

Note: There are two Corner Keys per Miter Corner.8

Corner Key Assembly Cont.3 Start #8 x 5/8” Flat Head Screw into one hole.

Repeat for all Corner Keys. Tighten screw halfway.

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Sill 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.

7Insert 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.

2”

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Sill Nose Horn Modification Cont.

8 Place Secondary Sill Key two inches from first key.

2”

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

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Flat Casing Assembly

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 Flat Casing and Sill Nose have

the correct Joints before moving onto Step 11.13

Install Screws11 Locate all Screw Holes. With Screw halfway

tightened, Rotate Screw Head with tool until second Corner Key Screw Hole appears.

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

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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.

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, then finish tightening first Screw.

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Trim Clip Attachment14 Install “H” shaped clips flush with the

bottom of each Door Jamb.

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Trim Clip Attachment Cont.15 Install Trim Clips onto Door Frame Corners.

Space Trim Clip 1.5” away

from Corner. Tap two Trim

Clips into each corner.

Note: Install additional trim clip midway between two corner clips. For doors larger than 6068, install additional clips a maximum of 4’ on center.

1.5”

Note: If installing Flat Casing with Sill Nose, do not place Trim Clips on Transom Sill.

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End Plug Installation16

Squeeze foam End Plugs into open ends of Flat Casing and Push foam in until it is flush with end of Flat Casing.

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Trim Installation17 Apply 1/4" diameter 2" long beads of sealant to

back of Flat Casing. Space Beads 18" apart.

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

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Trim Installation

When installing Flat Casing with Sill Nose, slide Sill Nose Lip into Transom Frame Accessory Groove.

19 Push Flat Casing onto Door Frame.

Push Flat Casing (without Sill Hose) onto Door Frame until it seats fully.

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Trim Installation Continued

19End of Flat Casing does not easily snap onto "H" clip, so to avoid damaging Flat Casing , place a wood block directly over face end of Flat Casing and tap Flat Casing onto "H" clip.

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Clean Up

• Wipe up any excess caulk.• Clean up scuff marks with soap and water.• TiteBond® WeatherMaster Sealant

compatible colors.

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Essence Accessories SealantMilgard Color Milgard TiteBond P/N TiteBond ColorBark SE7673AR 44061 BronzeBlack Bean SE7673BL 44031 BlackCinnamon SE7673CI 45521 RedClassic Brown SE7673LW 44211 BrownClear SE7673CL 43991 ClearEvening Sky SE7673ES 45531 BlueFern SE7673FN 45651 GreenFog SE7673FO 46681 GrayFrost SE7673FS 44001 WhiteHarmony SE7673HR 44641 ClayNatural Crème SE7673NT 45511 Poplar WhitePea Pod SE7673PP 49211 GreenPebble SE7673PE 46811 GrayRattan SE7673RA 46081 BeigeTweed SE7673TE 44691 ClayTwilight SE7673BL 44031 Black

LA7918MM

REVISIONS

REV ECN DESCRIPTION DATE DRAWN APPD.

A1 2969ECNEG Release 05/31/2013 CN VM

B 3973ECNTA Added Page 5 06/08/2016 BBB VM

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Flat Casing Nail Fin Door Installation...• Flat Casing is not compatible with other Milgard Window or Door offerings. • Do not use Flat Casing on other manufacturers’ products.

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