TREX RainEscape 4x4 Post Flash
Available for delivery in 3–14 business days.
Please, contact us to confirm pickup availability.
TREX RainEscape 4x4 Post Flash
4x4 Post Flash – Protective Sealing for Post Installations
The 4x4 Post Flash is a high-quality protective flashing designed to shield wooden posts from moisture damage, rot, and decay caused by rain, snow, and ground moisture. This flashing is ideal for deck posts, fence posts, and other vertical structures, providing a weather-resistant barrier that extends the life of the post by preventing water from entering the wood at the base.
Key Features:
✔ Moisture Protection – Prevents water from seeping into the base of the post, reducing the risk of wood rot and decay
✔ Durable Construction – Made from high-quality materials such as PVC, aluminum, or galvanized steel for long-lasting performance
✔ Easy Installation – Pre-formed design fits standard 4x4 posts, and can be easily installed with screws or adhesive
✔ Weather-Resistant – Designed to withstand rain, UV exposure, and extreme weather conditions, ensuring reliable protection year-round
✔ Prevents Ground Moisture Damage – Keeps moisture from penetrating the post by elevating it off the ground
✔ Aesthetic Enhancement – Offers a neat, professional appearance, hiding the base of the post and creating a finished look
✔ Low Maintenance – Requires minimal upkeep and helps to prolong the lifespan of posts and fencing
Technical Specifications:
- Material: Typically made of PVC, galvanized steel, or aluminum for durability
- Size: Specifically designed for 4x4 posts (nominal dimensions 3.5” x 3.5”)
- Installation Method: Simple installation with screws, adhesive, or nail attachments
- Weather Resistance: UV-resistant, rust-proof, and waterproof
- Compatibility: Fits most 4x4 deck and fence posts, and compatible with various post types
Common Applications:
- Decks and Patios – Protects the base of deck posts and fence posts from moisture damage
- Fencing – Prevents wood rot and decay at the base of wooden fence posts
- Landscape Structures – Ideal for pergolas, arbors, and other garden features
- Outdoor Installations – Provides a durable protective seal for any post exposed to outdoor elements
The 4x4 Post Flash is an essential accessory for homeowners, contractors, and landscapers looking to protect wooden posts from moisture damage. Whether for decks, fences, or landscaping projects, this product helps prolong the life of your outdoor structures and ensures long-term durability and performance.
Shipping, Delivery, Pick-Up, Returns & Warranty
Please review the information below before placing your order.
Shipping & Delivery
Composite Deck Shop delivers to jobsites in Ontario that are accessible to large trucks. Shipping outside Ontario is available upon request.
Orders may be shipped by flatbed truck, flatbed trailer, or pick-up truck for smaller railing and accessory orders. Smaller orders may also ship by major couriers or Canada Post. Please confirm the shipment type at the time of purchase or select an available shipping option at checkout.
Some deliveries are unloaded with a Moffett mobile forklift, while others are offloaded by hand from a flatbed. If on-site help is required, this will be noted in the delivery option selected at checkout.
Shipping rates vary based on order size, order type, and distance from one of our four Ontario locations. Prices start at $160 per order.
Material is dropped off no more than 3 metres from where the delivery truck can park. Special placement requests, such as delivery into a garage or backyard, may be available for an additional fee and require a custom quote.
Delivery timeframes
In-stock items: Next day to 7 business days, depending on the time of year and the order size and type.
Special order items: 4 business days to 14 days, depending on order type, size, and time of year. If special order material is not available through our distribution, our sales staff will advise you individually.
Pick-Up Information
All pick-ups require either an online order with pick-up available at the selected location, or approval from one of our sales representatives by phone or email.
Please do not arrive expecting immediate pick-up. We do not operate self-serve warehouses.
After an order is placed, preparation can take from 4 hours to 3 days, provided the material is in stock at the requested location. Timing depends on material quantity, material type, and time of year. A sales representative can provide an exact timeframe.
Custom cutting is available upon request for an additional cost.
Returns & Refunds
Special order material is final sale and cannot be returned or refunded.
In-stock material may be returned within 30 days of purchase if it is in original condition and in original, undamaged packaging. A 20% restocking fee applies to all returns of in-stock material.
Customers are responsible for returning material to our store or arranging pick-up at their own cost. Composite Deck Shop may take 1 to 4 business days to inspect returned material. If the material is not considered to be in original condition, no refund will be issued and the customer must pick it up. Return condition is determined at the sole discretion of Composite Deck Shop staff.
Warranty
Composite Deck Shop does not provide warranty coverage for the products it sells. Most products are covered by the manufacturer’s warranty. Customers are responsible for reviewing the manufacturer’s warranty before purchase. Composite Deck Shop is not obligated to assist with warranty issues or claims.
Please visit the Shipping, Delivery, Pick-Up, Returns & Warranty page to review all conditions.