US Patent 8,448,386/AAMA 502-11 Tested/IRC R703.8 CompliantResidential / Multifamily / Commercial Request a quote
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A white window set in gray lap siding on a newer house, with no trim around it

Sheet 02 / Assembly and sections

How It Works

A window installation method that embeds flashing into the existing opening before a fin-less replacement window goes in, without removing the cladding.

A window set in lap siding, with no trim

Application / Step by step

Ten stages, one window.

The existing siding or cladding is not shown in these drawings, to accentuate the install steps. On a real opening it stays on the wall.

Fig. 4 / Application, step by step Stage 01 of 10
Stage 1 of the installation drawn on the opening: Remove the existing windowStage 2 of the installation drawn on the opening: Corner guardsStage 3 of the installation drawn on the opening: Sill flashingStage 4 of the installation drawn on the opening: Head flashingStage 5 of the installation drawn on the opening: Jamb flashingStage 6 of the installation drawn on the opening: Interior L flashingStage 7 of the installation drawn on the opening: MicrosealantStage 8 of the installation drawn on the opening: Sealant on the L angleStage 9 of the installation drawn on the opening: Set the windowStage 10 of the installation drawn on the opening: Seal the perimeter

  1. Stage 01

    Remove the existing window

    1. 1Existing window removed
    Steps 1, 2 and 3 in the full procedure

  2. Stage 02

    Corner guards

    1. 1Rain Jacket rigid corner guards, applied to the rough sill behind the building paper
    2. 2OSI Quad Max, applied as a bedding sealant to the corner guards
    Steps 4 and 5 in the full procedure

  3. Stage 03

    Sill flashing

    1. 1Rain Jacket rigid sill flashing, installed over the corner guards and the building paper
    Step 6 in the full procedure

  4. Stage 04

    Head flashing

    1. 1Rain Jacket rigid head flashing, cut and embedded behind the existing building paper
    Step 7 in the full procedure

  5. Stage 05

    Jamb flashing

    1. 1Rain Jacket rigid jamb flashing, cut and embedded behind the existing building paper
    Step 8 in the full procedure

  6. Stage 06

    Interior L flashing

    1. 1Rain Jacket interior L flashing, applied against the interior liners at the sill, jambs and head
    Step 10 in the full procedure

  7. Stage 07

    Microsealant

    1. 1Microsealant, applied over the exterior and interior rigid flashings
    Steps 11, 12 and 13 in the full procedure

  8. Stage 08

    Sealant on the L angle

    1. 1OSI Quad Max applied to the interior L angle
    Step 14 in the full procedure

  9. Stage 09

    Set the window

    1. 1Set the window into the pre-flashed opening
    2. 2Level, plumb, square and fasten the window to the opening
    Step 15 in the full procedure

  10. Stage 10

    Seal the perimeter

    1. 1OSI Quad Max and foam, applied to the perimeter gap between the window and the siding
    Steps 16 and 17 in the full procedure
A white window set flush in gray lap siding under the eaves, with no trim
Fig. 5 A white window set flush in lap siding, no trim

On site / Vinyl siding

The siding stays on the wall.

Rain Jacket integrates to the existing building paper without removing the vinyl siding. One window, start to finish, filmed from outside.

Watch the installation

Components / Installation Manual, pages 4 to 7

What each part does.

  • RJ Sill Flashing

    Fig. 21.2

    RJ Sill Flashing

    .055 PVC, 3" x 1/2"

    Directs water away from the bottom of the window opening and out over the building paper, completing the layered waterfall effect of the system.

  • RJ Corners

    Fig. 21.3

    RJ Corners

    PVC, 3 1/2" x 7"

    Form a continuous barrier against water penetration at the critical corner areas.

  • RJ Head Flashing

    Fig. 21.4

    RJ Head Flashing

    .055 PVC white with receiver, 3" x 1 3/8" x 1/4"

    Deflects water from the head of the window.

  • RJ Jamb Flashing

    Fig. 21.5

    RJ Jamb Flashing

    .055 PVC, 3" x 1/2"

    Directs water away from the sides of the window and integrates to the interior L angle with the microsealant.

  • RJ Interior L Angle

    Fig. 21.6

    RJ Interior L Angle

    .055 PVC white L angle, 3/4" x 1/2"

    Creates a back pan and a bridge point for the microsealant, and helps seal the window on the inside.

  • RJ Microsealant

    Fig. 21.7

    RJ Microsealant

    Micro sealant adhesive membrane, 60 mil, 50' rolls

    Seals and integrates the flashing components to create a 360-degree pan.

Trade supplies, not sold here

  • OSI Quad Max SealantBonds the window to the interior L flashing and creates an exterior sealant bead.
  • OSI Teq FoamSeals gaps, cracks, holes and voids around windows and patio doors.
Specifications and prices

The finished assembly / Vertical and plan sections

A cutaway of the head, sill and jamb.

Fig. 3Section through head and sill / NTS
0102020304050506060707

Swipe the drawing

  1. 01
    RJ Head Flashing
  2. 02
    RJ Microsealant tape
  3. 03
    OSI Quad Max finish sealant
  4. 04
    RJ Jamb Flashing
  5. 05
    RJ Interior L Angle
  6. 06
    OSI Quad Max, bedding sealant between window and L angle
  7. 07
    Interior finish sealant
Fig. 6Plan section through the jamb / NTS
020304050607

Swipe the drawing

  1. 02
    RJ Microsealant tape
  2. 03
    OSI Quad Max finish sealant
  3. 04
    RJ Jamb Flashing
  4. 05
    RJ Interior L Angle
  5. 06
    OSI Quad Max, bedding sealant between window and L angle
  6. 07
    Interior finish sealant
Seattle at dusk, the Space Needle among the downtown towers

Free estimate and advice on your specific project

New windows, same siding.

Send us the cladding type, the number of windows and your location, and we will give you a price. We have been in the window trade since 1992.

Request a quote Read the installation guide Talk to us1-866-922-1086