Quick Answer
Yes, you can install PEX in concrete slabs for radiant heating, but it requires specialized equipment and techniques to ensure proper bonding and thermal performance.
Installation Considerations
When installing PEX tubing in concrete slabs for radiant heating, it’s essential to use a specialized PEX tubing designed for radiant floor heating applications. This type of tubing typically has a thicker, more durable wall to withstand the high temperatures and pressures associated with radiant heating systems. Additionally, you’ll need to use a PEX crimper or press to ensure a proper seal at each connection point.
Specialized Tools and Techniques
To install PEX tubing in concrete slabs, you’ll need a few specialized tools and techniques. First, you’ll need a concrete saw or drill to create a grid of holes for the tubing. Next, you’ll use a PEX tubing cutter to cut the tubing to the desired length. Then, you’ll use a PEX crimper or press to attach the tubing to the manifolds and other connections. It’s also crucial to use a specialized adhesive, such as a modified silicone adhesive, to bond the PEX tubing to the concrete slab.
Bonding and Thermal Performance
To ensure proper bonding and thermal performance, it’s essential to follow the manufacturer’s instructions for the adhesive and to apply a thin, even layer to the PEX tubing and concrete slab. A general rule of thumb is to apply 1-2 grams of adhesive per linear foot of PEX tubing. This will provide a strong bond between the tubing and the concrete, ensuring optimal thermal performance and a long-lasting radiant heating system.
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