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4-in x 4-in Charcoal Black Composite Deck post base trim

Ratings & Reviews for Trex 4-in x 4-in Charcoal Black Composite Deck post base trim

4.3
332
Review
 4.3 out of 5
333 Reviews


82% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise these post sleeves for dramatically improving deck aesthetics, delivering a crisp, polished, professional finish that seamlessly integrates with composite systems. Most highlight excellent color matching and the straightforward snap-together design that allows easy installation by anyone. However, some report sizing confusion, noting the sleeves fit 4.5-inch posts rather than standard 4-inch posts, causing gaps or mismatches. A few mention the plastic construction feels lightweight but inexpensive, and some note visible seams. Despite these concerns, most customers consider the product worthwhile for its visual transformation and installation simplicity.

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

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
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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
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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

Base

Ease of use and visual appearance

June 18, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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Response from TrexSupport

Hi Mike, we are glad to hear you are satisfied with your product. Thank you for choosing Trex! - Cami, Customer Care Team. Read More

TrexSupportJune 19, 2025

Trex

Works perfect

Would Recommend

Post sleeve fits right in. Gives it a nice finished look

June 9, 2025
Verified Purchaser
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Response from TrexSupport

Hello, and thank you for choosing Trex! We appreciate your remarkable review. Hearing that you love our products is the best thing we could hope for....

TrexSupportJune 10, 2025

Trex

wrong size

Would Not Recommend

it is not 4x4

June 7, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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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...

TrexSupportJune 9, 2025

Trex

Fits Well

Would Recommend

I was worried a bit about the look of the seam because they are 2 pieces. But, they fit together well. I suppose it makes it so they could be used on an existing post.

May 27, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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Response from TrexSupport

Hello, we are incredibly grateful that you took the time to share your feedback with Trex. Our company puts customer satisfaction as top priority, an...

TrexSupportMay 28, 2025

Trex

Easy to install loks grate

Would Recommend
May 27, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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Response from TrexSupport

Hello Uncle Joe. On behalf of all of us at Trex, we would like to thank you for sharing your positive feedback. We are thrilled that you love our pro...

TrexSupportMay 28, 2025

Trex

These are in 2 pieces and plastic

Would Not Recommend

I haven't assembled yet BUT... these don't look or feel like composite. They are lightweight plastic and they are in 2 pieces. I've tried to snap them together...that's not going so well.

May 27, 2025
Verified Purchaser
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Response from TrexSupport

Hi. Thank you for contacting Trex and sharing your experience with us. We sincerely apologize for the difficulties you’ve encountered thus far. If th...

TrexSupportMay 28, 2025

Trex

Not worth the money you pay for it

Would Not Recommend

It’s to big for the post it’s about 3/8” on 2 sides when you put it together.

May 21, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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Response from TrexSupport

Hi Jack, so sorry to hear that you are having issues. For further assistance, please contact us at 1-800-289-8739 or at customercare@trex.com. - ...

TrexSupportMay 23, 2025

Trex

Should be one piece...

Didn't realize and wish that it was a one piece item. Do not like the snap together sections, and that there is a line down where it connects...

May 8, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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Response from TrexSupport

Hello, and thank you for the feedback. The post skirts used to come in one piece, but we found that the two-piece skirts were preferred in case custo...

TrexSupportMay 8, 2025

Trex

Post

Would Not Recommend

Miss important on package. It started it fits a 4x4 post. It doesn’t it for a 41/2x 41/2 post

April 30, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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Response from TrexSupport

Hello, thank you for reaching out. We are sorry to hear of your experience. Our 4x4 post sleeves are designed to hit over a standard 4x4 post with th...

TrexSupportApril 30, 2025

Trex

Never received, spoke to Lowes 6 TIMES!

These were not received, yet after reporting they were not received, ON THE DAY they were not received, and 4 more chats and another call to Lowe's, STILL NOT REFUNDED. We will no longer buy online. Nightmare! Chat, USELESS. Calling, just as USELESS.

April 21, 2025
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Response from TrexSupport

Hello Deckbuilder, thank you for reaching out. we sincerely apologize for your negative experience. However, we would like to mention that calling yo...

TrexSupportApril 22, 2025

Trex

does NOT Fit.. DO NOT Buy

Would Not Recommend

the package says 4x4 post when the opening is actually 4.5 inches. completely irritated.

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Response from TrexSupport

Hello GB, thank you for your review. We are sorry to hear of your experience. We would like to mention that the overview will list the actual dimensi...

TrexSupportApril 21, 2025

Trex

They do not fit around a 4 x 4 post

Would Not Recommend

I ordered 4 x 4 and these are too big.

April 9, 2025
From 4-in x 4-in Classic White Composite Deck post base trim Verified Purchaser
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Response from TrexSupport

Hi Sandy, Thank you for contacting Trex and sharing your experience with us. We sincerely apologize for the difficulties you’ve encountered. If there...

TrexSupportApril 10, 2025

Trex