Name: Johns Manville GoBoard 3-ft x 5-ft x 1/2-in Waterproof Polyisocyanurate Backer Board 1.0 Sheets
Brand: Johns Manville
SKU: 999931180
Price: 24.98 USD
Rating: 4.7 (449 reviews)

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Johns Manville GoBoard 3-ft x 5-ft x 1/2-in Kit

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GoBoard is a waterproof, ultra-lightweight, tile backer board from Johns Manville. It is a Polyiso foam board engineered for durability, yet is up to 80% lighter than cement backer boards. It's easy to handle, cut and install - ideal for both the Pro and DIYers to complete the tile project faster.

GoBoard tile backer board is waterproof, durable, and ultra-lightweight
For tile installations of walls, showers, and ceilings
Easy to cut with a standard utility knife, no crumbling or disintegrating
Easy to install - attach with backer board screws or roofing nails
Seal only the board joints and fastener locations for a waterproof tile assembly
GoBoard tile backer weighs up to 80% lighter than cement backer boards
Pairs with the Shower Pan Kit

General
Series Name	GoBoard	Material	Polyisocyanurate

Dimensions
Actual Length (Inches)	60	Common Thickness in Inches	1/2-in
Actual Thickness (Inches)	0.47	Weight (lbs.)	7.5
Actual Width (Inches)	36	Coverage Area (Sq. Feet)	15
Common Measurement (W x L)	3-ft x 5-ft

Features
Number of Sheets	1	Waterproof	Yes
Water Resistant	Yes	Sold As	Sheet

Certifications
ANSI A118.9 Compliant	Yes	CA Residents: Prop 65 Warning(s)	No
ASTM C1288 Compliant	No

Warranty
Warranty	10-year limited

Compatibility
For Use with Fireplace Exteriors	No	For Use with Garage Floors	No
For Use with Kitchen Backsplashes	Yes	For Use with Garage Walls	No
For Use with Shower Walls	Yes	For Use with Patios	No
For Use with Bathroom Walls	Yes	For Use with Pools	No
For Use with Bathroom Floors	Yes	For Use with Shower Floors	Yes
For Use with Kitchen Counters	Yes	For Use with Vinyl Floors	No

Miscellaneous
UNSPSC	30161500

Check out the Best Selling Backer Board on Lowes.com

Review

4.7 out of 5

449 Reviews

94% Recommend this product

Ratings may include incentivized customer reviews.

+ 33 images

What Customers Are Saying

The GoBoard product is a lightweight and user-friendly alternative to traditional cement backer boards for DIY bathroom and tile projects. It is highly water-resistant and can be easily cut with a utility knife, significantly reducing installation time and effort. Customers report the product is a high-quality option well-suited for bathroom renovations and tile work.

Customer review summary generated by AI, including incentivized reviews.

449 Customer Reviews

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Light weight

Would Recommend

Super light weight a great alternative to traditional backer board

Amy LApril 8, 2026
Verified Purchaser

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Go with GoBoard

Would Recommend

The GoBoard is very lightweight, cheaper than alternatives, and super easy to work with. Installation was a breeze.

GregApril 8, 2026
Verified Purchaser

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Don't overdrive screws while installing it.

This product is great it is light weight and easy to use

Tom SApril 5, 2026
From GOBOARD 4-ft x 8-ft x 1_SLASH_2-in Waterproof Polyisocyanurate Backer Board 1.0 Sheets Verified Purchaser

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Easy material to work with for the DYIer

Would Recommend

Light weight and easy to handle, cut, fit and install.

RobertApril 4, 2026
Verified Purchaser

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Light weight and easy

Would Recommend

It is light weight and easy to cut and work with. We used it in place of green board (dry wall) in our bathroom. Very happy with the results.

JustUsApril 3, 2026
Verified Purchaser

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best material out there with little to no issues

Would Recommend

Easy to use

francoApril 1, 2026
From GoBoard 3-ft x 5-ft x 1_SLASH_4-in Waterproof Polyisocyanurate Backer Board 1.0 Sheets Verified Purchaser

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Be careful with the type of thinset you use.

Would Recommend

Its easy to cut and lightweight.

tibew55April 1, 2026
From GoBoard 3-ft x 5-ft x 1_SLASH_4-in Waterproof Polyisocyanurate Backer Board 1.0 Sheets Verified Purchaser

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Response from JohnsManvilleTeam

Thank you for choosing Johns Manville GoBoard for your project - If you have any additional feedback you'd like to share, please feel free to ema...

Johns Manville GoBoard 3-ft x 5-ft x 1/2-in Waterproof Polyisocyanurate Backer Board 1.0 Sheets

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