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Inteplast Group Building Products 9/16-in x 3-15/16-in x 8-ft Traditional Finished Polystyrene Baseboard Moulding

Name: Inteplast Group Building Products 9/16-in x 3-15/16-in x 8-ft Traditional Finished Polystyrene Baseboard Moulding
Brand: Inteplast Group Building Products
SKU: 50148002
Rating: 4.6 (105 reviews)

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4.6

105

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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)	3.9375	Height Measurement	3-15/16-in
Actual Length (Feet)	8	Length Measurement	8-ft
Actual Thickness (Inches)	0.5625	Thickness Measurement	9/16-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

4.6 out of 5

105 Reviews

91% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

What Customers Are Saying

Customers overwhelmingly praise the elegant, prefinished white finish that requires no painting and installs easily with standard tools or adhesive. The lightweight, flexible material cuts smoothly and suits moisture-prone areas like bathrooms and kitchens better than traditional wood. Many appreciate its clean, ready-to-use appearance and ability to sit on concrete without water damage concerns. A few note the material dents or cracks if handled roughly or cut slowly, and some prefer traditional wood despite the extra effort. Overall, most find it an excellent, convenient choice for their spaces.

Customer review summary generated by AI, including incentivized reviews.

105 Customer Reviews

Sort By

Great moulding

Would Recommend

Installed this moulding in an upstairs hallway and bedroom doors. Worth the extra price because it looks already painted.

CheeseballAugust 25, 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 our Moulding was the perfect fit to finish you...

Inteplast TeamAugust 26, 2026

Inteplast

Would Recommend

We overhauled the bathroom. This is the floor trim we used. I painted it along with the door casings. It looks great with all the other bathroom work. If you want another look than your 40 year old trim, this looks pretty good.

Cjeff55July 30, 2026
Verified Purchaser

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5-star review of our Baseboard Moulding! We’re delighted to hear that it helped give your bathroom remodel a fresh new look and th...

Inteplast TeamJuly 31, 2026

Inteplast

Good looking baseboard

Would Recommend

I bought this baseboard moulding a week or two ago and I am happy with the way that it looks in my house. It is taller than the baseboard that was originally in my house and once installed it gives my walls an improved look.

brbrbrbrJuly 8, 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 pleased with the finished result of y...

Inteplast TeamJuly 8, 2026

Inteplast

An improvement to our office.

Easy to apply

dcscottJune 9, 2026
Verified Purchaser

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your 5 star review on our Crystal White Polystyrene Baseboard Moulding! We are happy to hear that our Moulding was the perfect fit to f...

Inteplast TeamJune 10, 2026

Inteplast

Fragile

Would Not Recommend

Lightweight, but it dents really easily

YoloMay 2, 2026
Verified Purchaser

Was this Review Helpful ?

Response from Inteplast Team

Thank you for your review on our Crystal White Polystyrene Baseboard! Our Polystyrene products share many of the same properties as Pine, which is a ...

Inteplast TeamMay 4, 2026

Inteplast

Perfect baseboard

These look great in our space. Good height and color.

IDickDecember 4, 2025
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 our Moulding overall, ...

Inteplast TeamDecember 5, 2025

Inteplast

Works great

Would Recommend

Very flexible and easy to cut

Jgw2July 23, 2025
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 our product, and the i...

Inteplast TeamJuly 24, 2025

Inteplast

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COMPARE PRODUCTS

		Name	Current Item Inteplast Group Building Products9/16-in x 3-15/16-in x 8-ft Traditional Finished Polystyrene Baseboard Moulding
		Ratings	105
		Material	Polystyrene
		Finish	Finished
		Type	Baseboard
Royal Building Products9/16-in x 3-1/4-in x 8-ft Colonial Finished PVC WM623 Baseboard Moulding	Royal Building Products9/16-in x 3-1/4-in x 12-ft Colonial Finished PVC WM623 Baseboard Moulding	RELIABILT1/2-in x 5-1/4-in x 8-ft Colonial Primed MDF 163E Baseboard Moulding	Inteplast Group Building Products1/2-in x 4-3/16-in x 8-ft Traditional Finished Polystyrene Baseboard Moulding	Inteplast Group Building Products1/2-in x 4-in x 8-ft Modern Finished Polystyrene Baseboard Moulding	TRIMFINITY5/8-in x 3-1/4-in x 8-ft Colonial Finished Polystyrene Baseboard Moulding	RELIABILT9/16-in x 3-1/4-in x 12-ft Colonial Primed Finger Jointed Pine 623 Baseboard Moulding	RELIABILT9/16-in x 4-1/4-in x 8-ft Colonial Primed Finger Jointed Pine 620 Baseboard Moulding	RELIABILT1/2-in x 4-1/4-in x 8-ft Colonial Primed MDF 620 Baseboard Moulding
158	236	348	76	215	4	317	357	1347
PVC	PVC	MDF	Polystyrene	Polystyrene	Polystyrene	Wood	Wood	MDF
Finished	Finished	Primed	Finished	Finished	Finished	Primed	Primed	Primed
Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard	Baseboard