Prices, Promotions, styles, and availability may vary. Our local stores do not honor online pricing. Prices and availability of products and services are subject to change without notice. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted.

4-in x 4-in Classic White Composite Deck post base trim

Ratings & Reviews for Trex 4-in x 4-in Classic White Composite Deck post base trim

4.3
330
Review
 4.3 out of 5
330 Reviews


81% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise these post sleeves for delivering a professional, high-end aesthetic that transforms deck appearance with a crisp, polished finish. Most highlight the seamless integration with railing systems and flawless color matching. Many appreciate the updated two-piece snap-together design, noting it's intuitive and easier to install than expected, with tight seams barely noticeable once assembled. However, some report sizing confusion, as the product fits 4.5-inch posts rather than standard 4-inch sizes, causing gaps on older systems. Despite minor material quality concerns from a few reviewers, most find the product fulfills its purpose effectively.

Customer review summary generated by AI, including incentivized reviews.
331 Customer Reviews

Resold damaged item

Would Recommend

I bought a 4X4X48 Trex composite deck post. Inside the damaged packaging of the item, that had obviously previously been returned, was a 4X4X38 Trex composite deck post. Before Lowes resells returned items to other customers I expect the contents to be reinspected so as not to waste my time on returns. I previously pointed out damage of the same item in-store to employees. This was an online purchase. Unacceptable.

September 1, 2025
From 4-in x 4-in Charcoal Black Composite Deck post base trim Verified Purchaser
Was this Review Helpful ?
Response from TrexSupport

Hello! We are so sorry to hear of the issues you've experienced. Please reach out to us at 1-800-289-8739 so that we may further assist. -Trex Cu...

TrexSupportSeptember 2, 2025

Trex

Very good

Would Recommend

I liked the white composite deck post sleeve for its crisp, polished appearance that instantly upgrades a deck’s look. It’s designed to protect and cover structural posts, resisting rot, insects, and weather damage. The low-maintenance composite material stays bright over time, and installation is simple, creating a seamless, professional finish that complements various railing styles.

August 13, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
Was this Review Helpful ?
Response from TrexSupport

Hello, and thank you so much for your wonderful 5-star review! We genuinely appreciate you taking the time to share your experience. It's custome...

TrexSupportAugust 14, 2025

Trex

Not even close

Would Not Recommend

They are not correct in size to fit a vinyl post sleeve. .25 gap on all sides. They need to redo the mold or fire the quality control inspector for not knowing how to measure components.

August 6, 2025

From trex.com

Response from Trex Customer Care

Hello, we sincerely apologize for your negative experience. We’d like to note that our post sleeves are designed to fit over pressure-treated wood pos...

Trex Customer CareAugust 6, 2025

Measure with care

Would Not Recommend

This product was too big. I have a standard 4x4 post (actual measurement 3.5 x 3.5") with a white vinyl slip cover over it. I have no idea how this was measured, but it is way too big to fit around a covered 4 x 4 post. I do not how to find one that fits, except to measure what you have and then measure the trim.p to insure it fits correctly.

July 13, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
Was this Review Helpful ?
Response from TrexSupport

Hello, and thank you for your feedback. We’re sorry this product isn’t working for you. However we’d
like to learn more about your situation and...

TrexSupportJuly 15, 2025

Trex

Nice base

Would Recommend

Really like that there 2 piece

July 11, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
Was this Review Helpful ?
Response from TrexSupport

Hello, We can’t thank you enough for your kind review! Trex

TrexSupportJuly 11, 2025

Trex

Color does not match

Would Recommend

These were easy to install. One problem, these are a lighter brown than my older trex railing. I had to paint them to match

July 2, 2025
From 4-in x 4-in Saddle Composite Deck post base trim Verified Purchaser
Was this Review Helpful ?
Response from TrexSupport

Hello, We’re so sorry to hear about your experience with our product. We aim to offer 100% customer satisfaction to all of our customers, and would l...

TrexSupportJuly 2, 2025

Trex

Easy to install

Would Recommend

Easy to install

June 25, 2025
From 4-in x 4-in Saddle Composite Deck post base trim Verified Purchaser
Was this Review Helpful ?
Response from TrexSupport

Hello Joe, and thank you for your 5 star review. We really appreciate you taking the time to share your experience with us as well. We count ourselve...

TrexSupportJune 26, 2025

Trex