
Sheet 06 / The case
Why Rain Jacket
As window replacement contractors since 1992, we have seen hundreds of times the urgent need for a replacement window system that would not rely on sealants or foams to protect against water and air penetration.

The case / The barrier
Tied into the weather resistant barrier already on the wall.
Especially at risk are wall systems with masonry claddings and stucco. Now, with the advent of new code, pressure testing requirements, and the number of lawsuits related to water intrusion around window installations, it is more important than ever to protect yourself and your structure from rot and mold. With the Rain Jacket Flashing System we register our replacement window flashing elements to the existing serviceable weather resistant barrier and substrate, and create a true weather tight system that will pass AAMA pressure tests.
Benefits / 14
Fourteen reasons, from the field.

Tested and code compliant
- 01Passes ASTM E1105 and AAMA 502-11 field water penetration resistance testing, as outlined in Washington State RCW 64.55.050.
- 02Passes AAMA pressure tests equal to 120 MPH wind pushing 8 inches of rain per hour.
- 03Accepted as a recommended method to meet IRC R703.8 window flashing code.
- 04The only replacement window flashing installation that can be used on previously retrofit windows that leak, and still pass pressure testing.
- 05The only replacement window installation for brick and stucco buildings that will pass pressure testing.

Works with the existing wall
- 06Can be integrated into an existing serviceable building envelope.
- 07May help existing water penetration problems behind the building paper, by diverting water at the head flashing.
- 08Lets the building owner approach remediation sequentially rather than all at once, reducing upfront cost and allowing siding to be installed later.
- 09No exterior trim is needed, allowing maximum flexibility in exterior design.

Easier on the job
- 10Does not rely on an exterior caulking bead to prohibit water and air penetration.
- 11A true air and water tight installation maximizes the efficiency of the new replacement windows.
- 12Can virtually eliminate callbacks from water or air penetration.
- 13Can be modified for most window and door systems and sizes.
- 14Non-corrosive, non-conductive, and easy to cut and attach.

Rain Jacket / In the lab
120 MPH wind, 8 inches of rain per hour.
Passes AAMA pressure tests equal to 120 MPH wind pushing 8 inches of rain per hour.
Design pressure ratings
What a pressure test measures.
Design pressure testing was instituted in the 1940s by a group of window manufacturers and engineers concerned about hurricanes and other types of severe weather systems. The intent was to measure how a variety of building products performed in these conditions.
The design pressure tests were designed to measure wind loads, and how resistant windows and the installation would be to different types and severities of storms.
National building codes, IBC, IRC and HUD, now require testing and certification of windows and doors. Windows and sliding glass doors must meet the requirements of industry standards that include air, water and structural testing.
Design pressure
- Instituted
- In the 1940s, by window manufacturers and engineers
- Measures
- Wind loads, and how windows and the installation resist storms
- Required by
- IBC, IRC and HUD
- Covers
- Air, water and structural testing
- Rain Jacket, in the lab
- 120 MPH wind driving 8 inches of rain per hour
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.