SV-3 Siding Vent


A simple, effective solution for rainscreen ventilation behind wood, hardboard & fiber cement siding.

Venting behind your siding is just as necessary and valuable as venting your attic. Trapped moisture from driving rain or condensation can cause major problems. Paint peels off, exterior sheathing gets wet, siding can warp and your house wrap becomes saturated. The 7/16” thick SV-3 Rainscreen Siding Vent solves these problems with a minimum amount of work and expense.

Match the SV-3 with Cor-A-Vent’s Sturdi-Strips polyproylene furring to create the Siding Vent System – the first commercial rain screen system on the market**. The first part of the system is the heavy-duty Sturdi-Strip furring strips, which hold the siding away from the wall, creating the necessary minimum capillary break (3/8” or 10mm) that will allow moisture to drain away instead of becoming trapped. The SV-3 at the top and bottom of the walls will let that moisture drain out and allow fresh air to pass through, keeping the system dry, all while keeping insects out. The Siding Vent System was designed to last and will not crush or compress like competing “drainage mat” rainscreen products. 

** In situations where exterior rigid foam insulation is being installed, Cor-A-Vent recommends using ¾” thick treated wood furring strips installed over the foam, screwed into the wall studs, to provide a structural fastening point for the siding, and the SV-5 Siding Vent installed at the top and bottom to supply the rainscreen drainage, airflow, and insect screen.
Siding Vent Detail
Key Benefits
  • Drainage efficiency (per ASTM E 2273) -- 92%
  • 7/16” thick by 3” high
  • Easy-to-handle 4-feet long sections
  • Pairs great with Sturdi-Strips, or other 3/8” to ½” thick furring
  • 24 pcs. per carton (96 lin. feet)
  • Color: Black
  • Heat-resistant: made from profile extruded polypropylene plastic
  • Impact-resistant: screw, staple or power-nail in place
  • Crush-resistant: Will not compress like “drainage mat” products
SV-3 detail view

Q: How much SV-3 do I need?
A: SV-3 runs linearly along the top and bottom of the wall, as well as above and below windows or doors. Take the total length of all walls and multiply by 2 (for top and bottom), then account for above and below wall penetrations to determine how many linear feet of SV-3 you will need.

For 1-page SV-3 submittal sheet Click Here
For Pdf of SV-3 Siding Vent with STURDI-STRIPS Detail Drawing Click Here.
For Pdf of Gable End Rain Screen Detail Drawing Click Here.
For Pdf Detail Using Siding Vents Around Wood Windows Click Here.
For Pdf Detail Using Siding Vents Around Vinyl Windows Click Here
To Download DWG Siding Vents Cad Files Click Here.
Click here for our complete list of Technical Drawings.
Click here for the Rainscreen Siding Ventilation Guide.

Click here to learn about Oregon Residiential Specialty Code R703.1 requiring a rain screen space behind siding.
SV-3 close up

Product Packaging and Shipping Information (SV-3)
Pcs per Unit

24 - 4 foot piece
Shipping Weight per Unit

13 lb

To learn more about SV-3 Siding Vent click here to contact us.


Here are some real-world examples of the products above. Click the images to enlarge and read descriptions.

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