US Patent 8,448,386/AAMA 502-11 Tested/IRC R703.8 CompliantResidential / Multifamily / Commercial Request a quote
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A modern home at dusk with lit windows across two stories

US patented / AAMA tested / IRC R703.8

Replace windows without removing the siding.

A flashing system that ties into the weather resistant barrier already on the wall, so the new window passes pressure testing and the building paper and trim stay in place.

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Every window on this house is a place water can get inPacific Northwest

Field water

ASTM E1105AAMA 502-11, per Washington RCW 64.55.050

Lab pressure

120 MPHWind driving 8 inches of rain per hour

Code

IRC R703.8Pan, jamb and head flashing at openings

Tested at

QED LabsAAMA certified testing facility

Patent

US 8,448,386Granted May 28, 2013

Sheet 01 / The problem

Eight out of ten are installed wrong.

Failure comes from aging sealant on windows without nail fins, and from windows never integrated to the existing building paper. Water and air get in, rot and mold follow, and the claim lands on the contractor and the manufacturer both.

8/10

Replacement window installations are installed incorrectly and may fail.

3/4

Window manufacturers will be sued for faulty workmanship on the part of the contractor.

60%

Of those manufacturers will be sued more than six times.

0

Manufacturers we could find who recommend a fin-less install when replacing metal framed windows.

Sheet 02 / Assembly, in order

Eleven layers, and the siding stays on.

Fig. 2Exploded isometric / NTS
Exploded isometric of a window opening seen from outside: the existing cladding, building paper, sheathing and framing, the Rain Jacket corners, sill, head and jamb flashing, interior L angle and microsealant, and the replacement window, eleven layers in all06FramingSheathing040205Building paper03Cladding0708

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  1. 01
    The existing wallCladding, building paper, sheathing and framing all stay. The old window is cut out and the siding nails cut back 3 inches.
  2. 02
    RJ CornersBehind the building paper, bedded in OSI Quad Max
  3. 03
    RJ Sill FlashingOver the existing building paper
  4. 04
    RJ Head FlashingEmbedded behind the existing building paper
  5. 05
    RJ Jamb FlashingEmbedded behind the existing building paper
  6. 06
    RJ Interior L AngleAgainst the interior liners, the back dam of the sill pan
  7. 07
    RJ MicrosealantBonds the L angle to the sill and jamb flashing, creating a 360-degree sill pan
  8. 08
    Replacement windowSet into the pre-flashed opening and screwed to the framing from inside

Sheet 03 / Vertical section

A cutaway of the head and sill.

Fig. 3Section through head and sill / NTS
0102020304050506060707

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  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

Head flashing

Installed behind the existing building paper, so water running down the wall is thrown clear of the opening.

Jamb flashing

Runs the full height of the opening and behind the existing building paper. Nothing depends on exterior caulk.

Sill flashing

Corner guards behind the paper, sill flashing over it, draining out over the cladding rather than into the framing.

Membrane

Microsealant bonds the interior L angle to the exterior sill and jamb flashing, creating a 360-degree sill pan.

Sheet 04 / Component schedule

Eight parts, all non-corrosive and non-conductive.

RefComponentSpecificationFunction
21.2RJ Sill Flashing.055 PVC / 3" x 1/2"Directs water away from the bottom of the opening and out over the building paper.
21.3RJ CornersPVC / 3 1/2" x 7"Form a continuous barrier against water penetration at the critical corner areas.
21.4RJ Head Flashing.055 PVC, receiver / 3" x 1 3/8" x 1/4"Diverts water at the head of the window.
21.5RJ Jamb Flashing.055 PVC / 3" x 1/2"Runs the full height of the opening and is embedded behind the existing cladding.
21.6RJ Interior L Angle.055 PVC white / 3/4" x 1/2"Creates a back dam to the 360-degree sill pan.
21.7RJ Microsealant2" or 3" x 50 ftBonds the interior L angle to the exterior sill and jamb flashing, creating a 360-degree sill pan.
21.11OSI Quad Max3/8" bead, beddingBedding sealant applied to the interior L angle, the RJ corners and the exterior finish.
21.14OSI Teq FoamAs requiredPerimeter foam at the window once it is fixed to the framing.

Kit / 10 to 15 windows

Rain Jacket Flashing, 10 to 15 windows

  • Every component needed for ten large or fifteen small to medium windows
  • 250 lineal feet around the perimeter of the windows
  • Non-corrosive and non-conductive
  • Easy to cut and attach
  • Withstands AAMA pressure tests greater than 4.5 PSF
  • 1-year warranty
Kit price $895 Covers 250 lineal feet, 10 to 15 windows Request this kit Or ask about volume pricing

Sheet 05 / Sequence

Nineteen steps, written for professional installers.

White windows in blue-gray board and batten siding under a clear sky

Expect 1.5 to 3 hours to remove the old window and install the new one

01

Cut the old frame out

Cut around the opening rather than collapsing the frame, so the building paper survives and the sawzall has a guide.

02

Cut the nails back

Cut the siding nails 3 inches around the perimeter. Leave the old nail fin in place to keep the blade off the paper.

03

Corners, sill, head, jambs

Corners, head and jambs embedded behind the building paper. Sill flashing installed over the building paper.

04

Membrane, then the window

Microsealant onto clean, dry, frost-free surfaces, rolled flat with a J-roller. Then the window, screwed to the framing from inside.

Read the installation guide

Free estimate and advice on your specific project

Tell us about the job.

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
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