Install Moisture Barrier Under Laminate Flooring

Essential Aspects of Installing Moisture Barrier Under Laminate Flooring

Installing a moisture barrier beneath laminate flooring is a crucial step for protecting your flooring investment and preventing costly water damage. Here are some essential aspects to consider:

1. Types of Moisture Barriers

There are two main types of moisture barriers:

Polyethylene (PE)

: These flexible sheets provide a barrier against moisture and vapor transmission. *

Asphalt-Saturated Felt (ASF)

: These tarry sheets offer stronger protection against moisture and vapor, but require a longer drying time before installing the flooring.

2. Thickness and Installation Method

Use a moisture barrier with a thickness of at least 6 mils (0.15 mm). Thicker barriers provide better moisture protection.

For PE moisture barriers, overlap the sheets by 6 inches and tape the seams with moisture-proof tape. For ASF moisture barriers, follow the manufacturer's installation instructions.

3. Coverage

The moisture barrier should cover the entire subfloor, including any transitions between different types of flooring.

Start by rolling out the moisture barrier on the subfloor and trimming it to fit. Ensure that there are no gaps or tears.

4. Vapor Retarder

A vapor retarder is a layer within the moisture barrier that prevents moisture vapor from rising from the subfloor and damaging the laminate flooring.

Choose a moisture barrier that has a built-in vapor retarder or install a separate vapor retarder between the moisture barrier and the subfloor.

5. Climate Considerations

The type of moisture barrier you choose should consider the climate where you live:

Humid climates:

Use an ASF moisture barrier as it provides superior moisture protection. *

Dry climates:

A PE moisture barrier may be sufficient.

6. Subfloor Preparation

Ensure that the subfloor is level, dry, and clean before installing the moisture barrier.

Repair any cracks or uneven surfaces and remove any debris or moisture.

7. Professional Installation

If you are unsure about installing the moisture barrier yourself, consider hiring a professional flooring contractor to ensure a flawless installation.

By following these essential aspects, you can effectively protect your laminate flooring from moisture damage and enjoy its beauty and durability for years to come.