Quickflash Joist Flashing - Box of 30

$97.50

Cantilevered Quickflash Joist Flashings are one-piece weatherproof polypropylene saddle flashings for decks, porches, entrance roofs, and more!

Available for both 2x and 4x Dimensional Lumber - Cut to fit x4", x6", x8", x10" or x12"

Actual interior width is slightly more than 1.5" for X2 or 3.5" for X4, to fit modern dimensional lumber.

Quickflash Joist Flashings have many benefits:

  • Reduce liability
  • Shed water away from intersection
  • Help to prevent air leakage
  • Economical — save time and labor
  • Non-corrosive — non-conductive
  • Only flashing that is specifically designed for wall penetrations
  • Self sealing around fasteners
  • Easy to integrate with building envelope and works with all cladding systems
  • PLUS A 10 YEAR LIMITED WARRANTY!!!
  •  
Width: 2" JF2X
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Vendors: Quickflash SKU: JF2X
  • Easy Returns

    Easy Returns

    Return within 30 days of purchase date

  • Technical Support

    Technical Support

    Available 9am - 5pm EST Mon-Fri

  • Customer Support

    Customer Support

    Available 9am - 5pm EST, Mon-Fri

  • Fast Shipping

    Fast Shipping

    Ships within 48 hours if in stock

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Clint D. Verified Customer
09-18-25

Love it

Evgenii B. Verified Customer
09-17-25

oil is fire! delivered quickly and accurately! very grateful! have a nice day guys!

Mike S. Verified Customer
09-16-25

Nice east instal even tho my house has odd spacing for the ceiling joists Also nose to get the insulation I was missing

Michael S. Verified Customer
09-14-25

Excellent customer service and received the products in a very timely manner. Wouldn't hesitate again to purchase from Eco- Building!

Mary W. Verified Customer
09-12-25

First product shipment arrived damaged, they resolved quickly by shipping a replacement. The replacement was received today. Thank you.

Joseph G. Verified Customer
09-10-25

no complaints. good product and arrived in a timely manner

Robert R. Verified Customer
09-10-25

This cover was perfect for what I needed. I had 24 cans to do - easy install. Should see a difference this winter.

Nicholas R. Verified Customer
09-07-25

Great

Alan G. Verified Customer
09-06-25

Great purchase!

Dawna F. Verified Customer
09-04-25

Good folk. Quick delivery. Good product.

slide 2 of 50

Cantilevered Quickflash Joist Flashings are one-piece weatherproof polypropylene saddle flashings for decks, porches, entrance roofs, and more!

Available for both 2x and 4x Dimensional Lumber - Cut to fit x4", x6", x8", x10" or x12"

Actual interior width is slightly more than 1.5" for X2 or 3.5" for X4, to fit modern dimensional lumber.

Quickflash Joist Flashings have many benefits:

  • Reduce liability
  • Shed water away from intersection
  • Help to prevent air leakage
  • Economical — save time and labor
  • Non-corrosive — non-conductive
  • Only flashing that is specifically designed for wall penetrations
  • Self sealing around fasteners
  • Easy to integrate with building envelope and works with all cladding systems
  • PLUS A 10 YEAR LIMITED WARRANTY!!!
  •  

Quickflash Joist Flashing

The Cantilevered Quickflash Joist Flashing JF X2 fits 2" X 6" up to 2 X 12" dimensional lumber.

The Cantilevered Quickflash Joist Flashing JF X4 fits 4" X 6" up to 4 X 12" dimensional lumber.

One piece weatherproof polypropylene saddle flashing for: Decks, pergolas, entrance roofs, etcetera.

Actual interior width is slightly more than 1.5" for X2 or 3.5" for X4, to fit modern dimensional lumber.

Sold in boxes of 30.

Quickflash Joist Flashing

Quickflash also makes Electrical Flashing Panels and Plumbing Flashing Panels!

QuickFlash Joist Flashing Specifications

This Quickflash Joist Flashing JF X2 is 13 1/2 " x 4 1/2" x 2".

Cut to fit 2" X 6" up to 2 X 12" dimension lumber.

This Quickflash Joist Flashing JF X4 is 13 1/2 " x 6 5/8" x 2"

Cut to fit 4" X 6" up to 4 X 12" dimension lumber.

Actual interior width is slightly more than 1.5" for X2 or 3.5" for X4, to fit modern dimensional lumber.

  • Reduces liability
  • Sheds water away from intersection
  • Helps to prevent air leakage
  • Economical — saves time and labor
  • Non-corrosive — non-conductive
  • Only flashing that is specifically designed for wall penetrations
  • Self sealing around fasteners
  • Easy to integrate with building envelope and works with all cladding systems
  • PLUS A 10 YEAR LIMITED WARRANTY!!!

All Quickflash® Products are made in the USA Quickflash® Weatherproofing Products, Inc. products are covered by one or more of the following United States Letters Patent: 6,395,984; 6,543,186; 6,596,938; 6,649,835; 7,305,801; 7,389,616; 7,730,681; 7,640,699; 6,860,070 and other patents pending

  • Weight 20 lbs
  • Dimensions 1.3 × 1 × 1 in
  • Width 2" JF2X, 4" JF4X

Customer Reviews

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Anonymous

Would be great if the joist flashings had flange for the bottom of the joist.