Choosing the right moisture barrier underlayment is essential for laminate flooring to resist dampness from subfloors while improving comfort and sound. This guide reviews five leading options, focusing on barrier strength, compatibility, and ease of installation. Each product below includes key features to help you compare at-a-glance, and a Buying Guide at the end covers decision factors from concrete slabs to pre-attached pads.
| Product | Brand | Thickness | Roll Size | Main Benefit |
|---|---|---|---|---|
| ROBERTS 70-115 Moisture Barricade Underlayment | ROBERTS | 6 mil | 120 sq ft roll | Strong vapor barrier for vinyl, laminate, SPC, engineered wood |
| FLOORLOT BlueStep Underlayment | Floorlot | Unknown thickness | 200 sq ft | Built-in moisture barrier, sound reduction |
| ROBERTS 70-116 Moisture Barricade | ROBERTS | 6 mil | 300 sq ft roll | Wide subfloor compatibility, concrete-ready |
| FLOORLOT GoldMax Premium | Floorlot | 3 mm | 200 sq ft | Moisture protection with no extra films needed |
| QuietWalk Underlayment 200 sq ft | Quiet Walk | 3 mm | 200 sq ft | Pre-attached pad compatibility, recycled fiber |
The products above were chosen for strong moisture barriers, broad subfloor compatibility, and clear installation advantages. This set balances thickness, coverage, and practical use for typical North American homes with concrete or wood subfloors.
ROBERTS 70-115 Moisture Barricade Underlayment
Robust vapor barrier for vinyl, laminate, SPC, and engineered wood. The roll’s 6-mil thickness exceeds common NWFA requirements, helping minimize moisture migration from concrete or wood subfloors. Its 120 square foot roll provides a practical balance between coverage and ease of handling for typical rooms. Ideal for projects where a dedicated vapor barrier is needed beneath floating floor systems.
FLOORLOT BlueStep Underlayment
BlueStep provides built-in moisture protection to guard laminate and wood floors from subfloor moisture without needing extra films. It also offers standard sound absorption to reduce footstep noise, helping to minimize hollow sounds in modern floating floor installations. The 200 square foot roll is well-suited for typical living spaces and larger rooms, reducing the number of seams and potential moisture entry points.
ROBERTS 70-116 Moisture Barricade
Designed for versatile use, this 6-mil polyethylene film is suitable for laminate, vinyl, SPC, and engineered wood, including installations with pre-attached underlayment or floating resilient products such as SPC over concrete slabs. Its larger 300 square foot roll helps reduce seams in bigger spaces and is tested to meet moisture control standards for concrete subfloors. This option is a common choice for builders prioritizing reliable vapor barriers across diverse substrates.
FLOORLOT GoldMax Premium
GoldMax offers a 3 mm thick moisture barrier designed for laminate, engineered wood, and solid hardwood systems. Its built-in moisture protection means fewer steps during installation, reducing the need for additional films. The 200 square foot roll is adequate for many rooms, providing strong resistance to subfloor dampness while keeping installation straightforward for DIY enthusiasts and professionals alike.
QuietWalk Underlayment 200 Sq Ft
QuietWalk combines a 3 mm barrier with a recycled fiber core and is approved for floors with pre-attached pads. It emphasizes sustainable materials while still delivering a reliable moisture barrier to protect laminate and hardwood floors. The 200 square foot roll size fits standard rooms and smaller renovations, offering a balanced option for everyday homes.
QuietWalk Underlayment 200 Sq Ft (Alternate)
An additional QuietWalk option offers the same advantages: a built-in moisture barrier for subfloor protection, compatibility with pre-attached pads, and recycled materials. This variant is suitable for homes seeking an ecologically minded moisture barrier without sacrificing barrier performance.
MP Global Moisture Barrier Underlayment
MP Global offers a (.006 mil) polyethylene film with self-sealing adhesive tape for easy seam joining. The Quick-Seal approach helps ensure continuous moisture protection. This option is helpful for installations where clean seam sealing improves barrier performance and reduces the chance of moisture infiltration over time.
Buying Guide: Key Purchase Considerations
- Subfloor type: Concrete slabs typically require thicker, high-performance vapor barriers, while wooden subfloors may benefit from barrier systems with added noise reduction.
- Thickness and barrier strength: Higher mils or thicker films generally offer greater vapor resistance, but installation may be more challenging in tight spaces.
- Pre-attached pads vs. bare film: Pre-attached pads simplify installation and reduce stacking layers, but may limit material choices or underlayment compatibility.
- Sound reduction: If reducing footstep noise is a priority, look for products with built-in sound absorption features or compatible sound-rated underlayments.
- Moisture protection coverage: Larger rolls reduce seams, which can be critical for long rooms and open-plan spaces.
- Environmental considerations: Some underlayments use recycled fibers or sustainable materials, which may align with green remodeling goals.
- Installation ease: Self-sealing tapes and overlap features minimize gaps and simplify the process for DIYers.
- Compatibility: Ensure the chosen barrier works with your laminate’s installation method, whether floating, glued, or nailed, and with any pre-attached underlayment.
- Warranty and standards: Look for products tested to NWFA or industry-standard moisture barriers to ensure long-term performance.
The right moisture barrier underlayment helps protect laminate flooring from moisture-related issues, enhances comfort, and reduces sound transmission. When selecting a product, consider room size, subfloor type, and installation method to maximize performance and longevity of the floor system.