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Inteplast Group Building Products 1/2-in x 4-3/16-in x 8-ft Traditional Finished Polystyrene Baseboard Moulding

Name: Inteplast Group Building Products 1/2-in x 4-3/16-in x 8-ft Traditional Finished Polystyrene Baseboard Moulding
Brand: Inteplast Group Building Products
SKU: 50148108
Rating: 4.4 (76 reviews)

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Inteplast Moulding is designed to be low maintenance, easy to install, and ideal for areas where moisture is a concern. Choose from a wide variety of profiles and colors to add depth and detail to any ceiling, door, window, wall, or floor.

Prefinished - does not require painting or staining
Performs better than wood and MDF moulding in areas with high moisture
Quick and easy installation - just cut, nail, and install
An easy and affordable way to add character to a room

General
Color/Finish Family	White	Package Quantity	1
Finish	Finished	Use Location	Interior
Manufacturer Color/Finish	Crystal White	Installation Type	Finishing nails
Type	Baseboard	Edge Profile	Square
Material	Polystyrene	Paint Grade	No
Style	Traditional	Stain Grade	No

Dimensions
Actual Height (Inches)	4.1875	Height Measurement	4-3/16-in
Actual Length (Feet)	8	Length Measurement	8-ft
Actual Thickness (Inches)	0.5	Thickness Measurement	1/2-in

Features
Finger-Joint	No	Paintable/Stainable	Paintable
Flexible	No	Pro Package	No
Moisture Resistant	Yes

Certifications
CA Residents: Prop 65 Warning(s)	No

Warranty
Warranty	None

Miscellaneous
UNSPSC	30161900

Check out the Best Selling Baseboard Moulding on Lowes.com

Review

4.4 out of 5

76 Reviews

84% Recommend this product

Ratings may include incentivized customer reviews.

+ 1

What Customers Are Saying

The polystyrene baseboard moulding is praised for being easy to work with, install, and paint, providing good value, and being suitable for low-traffic areas. However, there are concerns about its durability and susceptibility to damage, with some finding it too soft and fragile for high-traffic applications. While the pre-finished white color is convenient, a few reviewers felt it did not take paint as well as wood.

Customer review summary generated by AI, including incentivized reviews.

76 Customer Reviews

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Good Choice for Basement / Humid Space

We bought this baseboard when re-doing our basement floors. We were comparing with traditional wood baseboard but this polystyrene stuff does better in high humidity spaces (great for a basement!). It is also easy to work with because it's light and can be nailed / glued same as wood baseboard. However, it totally still looks like wood baseboard, so I don't feel like it's a sacrifice on aesthetic like the cove base we had before. The only downside I see so far is that it softer than wood so a di...

guslyAugust 10, 2026
Verified Purchaser

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5 star review on our Crystal White Polystyrene Baseboard! This product is definitely suitable for basement and humid applications....

Inteplast TeamAugust 10, 2026

Inteplast

Would Recommend

IT'S EASY TO WORK WITH AND CUT. IT LOOKS GREAT

TOUCHJuly 18, 2026
Verified Purchaser

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5 star review on our Crystal White Polystyrene Baseboard! We are happy to hear that you were satisfied with the installation proce...

Inteplast TeamJuly 20, 2026

Inteplast

Perfect Trim for Shower

Would Recommend

We bought these items to finish trimming around the shower since they are moisture resistant. Installation was simple, and the finished shower looks appealing.

LollipopJuly 17, 2026
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/52abb0bf-2bbc-5112-a40d-99d38594993b

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/7fb6083a-f604-5384-b788-a3df0791b2db

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5 star review on our Crystal White Polystyrene Baseboard! We are happy to hear that you were pleased with our product overall, and...

Inteplast TeamJuly 23, 2026

Inteplast

Great option for the price.

Would Recommend

I bought these to replace my current baseboards. They cut well and are easy to install.

Jordan MFebruary 14, 2026
Verified Purchaser

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5 star review on our Crystal White Polystyrene Baseboard, Jordan! We are happy to hear that you were satisfied with the installati...

Inteplast TeamFebruary 18, 2026

Inteplast

Easy replacement of existing baseboards

Would Recommend

Good finish

briancDecember 13, 2025
Verified Purchaser

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5 star review on our Crystal White Polystyrene Baseboard, Brian! We are happy to hear that you were satisfied with the installatio...

Inteplast TeamDecember 15, 2025

Inteplast

Great for wet applications

Would Recommend

Great for bathrooms. Doesn’t wick any moisture and it’s already painted white.

JslawsJune 23, 2025
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/6246ab0b-8895-5f17-a14a-279fbbf26852

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5 star review on our Crystal White Polystyrene Baseboard! We are happy to hear that you were satisfied with the installation proce...

Inteplast TeamJune 24, 2025

Inteplast

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COMPARE PRODUCTS

		Name	Current Item Inteplast Group Building Products1/2-in x 4-3/16-in x 8-ft Traditional Finished Polystyrene Baseboard Moulding
		Ratings	76
		Material	Polystyrene
		Finish	Finished
		Type	Baseboard
Inteplast Group Building Products1/2-in x 4-in x 8-ft Modern Finished Polystyrene Baseboard Moulding	Inteplast Group Building Products1/2-in x 4-in x 8-ft Modern Finished Polystyrene Baseboard Moulding	RELIABILT1/2-in x 4-1/4-in x 8-ft Colonial Primed MDF 620 Baseboard Moulding	Royal Building Products9/16-in x 3-1/4-in x 12-ft Colonial Finished PVC WM623 Baseboard Moulding	Inteplast Group Building Products1/2-in x 4-in x 12-ft Traditional Finished Polystyrene Baseboard Moulding	RELIABILT9/16-in x 4-1/4-in x 8-ft Colonial Primed Finger Jointed Pine 620 Baseboard Moulding	RELIABILT9/16-in x 3-1/4-in x 12-ft Colonial Primed Finger Jointed Pine 623 Baseboard Moulding	Inteplast Group Building Products1/2-in x 3-3/16-in x 12-ft Traditional Finished Polystyrene Baseboard Moulding	RELIABILT1/2-in x 5-1/4-in x 8-ft Colonial Primed MDF 163E Baseboard Moulding
2	215	1347	236	6	357	317	6	348
Polystyrene	Polystyrene	MDF	PVC	Polystyrene	Wood	Wood	Polystyrene	MDF
Finished	Finished	Primed	Finished	Finished	Primed	Primed	Finished	Primed
Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard