Skip to product information
RainEscape 4x4 Post Flash

RainEscape 4x4 Post Flash

Guaranteed Manufacturer Quality

Innovation That Works For You

$25.95
Shipping calculated at checkout.

Pickup available at OAKVILLE Store

Usually ready in 2-4 days

RainEscape 4x4 Post Flash

Default Title

OAKVILLE Store

Pickup available, usually ready in 2-4 days

454 S Service Rd W
Oakville ON L6K 2H4
Canada

(905) 337-7707

TREX RainEscape 4x4 Post Flash

The TREX RainEscape 4x4 Post Flash is a specialized moisture barrier designed to seal the point where deck posts penetrate through your decking surface. By creating a tight, waterproof fit around 4x4 posts, this flashing component helps prevent leaks that could compromise your deck’s substructure over time.

Key Features

  • Custom Fit for 4x4 Posts:
    Engineered to wrap snugly around nominal 4x4 posts (actual size: 3.5″ x 3.5″).

  • Seals Out Moisture:
    Forms a watertight barrier to protect joists, framing, and the RainEscape system from water intrusion.

  • Flexible, Durable Material:
    Made from UV-resistant plastic that withstands expansion, contraction, and harsh weather conditions.

  • Easy to Install:
    Slides over posts and can be trimmed as needed with a utility knife for a perfect fit.

  • Seamless System Integration:
    Designed to work in tandem with the full TREX RainEscape under-deck drainage system.

Specifications

  • Fits: Nominal 4x4 deck posts (3.5″ × 3.5″ actual size)
  • Material: Flexible UV-resistant plastic
  • Colour: Black
  • Brand: TREX
  • Model #: POSTFLASH

Ideal For

  • Decks with TREX RainEscape or similar drainage systems
  • Sealing around post penetrations through deck boards
  • DIY or professional deck builds and renovations

You May Also Need

Need Help?

Have questions about installation or planning your under-deck drainage system? Contact our team or visit a Deck Store showroom for expert assistance.

Made with care

Great value

Elegant design

Quality materials

Details

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

Shipping & Returns

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.

Related products