Underlayment Screws

For flooring installation projects, Simpson MTH underlayment screws are essential. Highly durable and strong, these screws are premium-grade quality and provide the tight connection that professionals and DIY enthusiasts alike are looking for to properly secure wood underlayment to subflooring. 

MTH underlayment screws are also coated for increased rust resistance and to help reduce the risk of your floors becoming discolored. 

What Is Underlayment?

Several layers of flooring material are necessary for proper floor installation. There is subflooring that sits underneath the top flooring layer to provide a solid foundation, and there may also be underlayment, which is a thin layer of material that sits on top of the subflooring. 

That material is designed to help insulate, cushion, reduce wear-and-tear and provide sound absorption. Some underlayment materials may also include a vapor barrier to help prevent moisture from penetrating your flooring. 

What Are Underlayment Screws? 

Underlayment screws are specifically designed for fastening wood underlayment to wood subflooring. These screws have an intricate thread pattern that tightly holds the two flooring layers together to prevent squeaking, which is one of their advantages over nails and staples. 

MTH underlayment screws also have a compact trim head that helps to create a flush surface and prevent the countersinking of floor coverings, and its square drive is deeply recessed to tightly hold bits and reduce cam-outs. They are specially designed with sharp points for fast starts, and their high-low thread makes for easy driving. 

How to Use Underlayment Screws

Underlayment screws are simple and easy to use. First, underlayment sheets should be installed one at a time on top of a thoroughly cleaned layer of subflooring. The sheets should run in the same direction as the subflooring but with the seams offset so the underlayment bridges the subfloor joints.

Underlayment screws can be drilled in with driver bits along the edges of the sheet in at least two-inch intervals, and at least every 4 inches in the field area. Underlayment sheets should be screwed in so that they are touching or slightly apart by only about 1/8 inch. 

Buy Underlayment Screws From FMW Fasteners

At FMW Fasteners, we have high-quality underlayment screws available as individual or collated screws. We specialize in helping our customers get solutions to their fastening needs, no matter how hard they may be to find. When you do find what you're looking for, you can order whatever quantity you may need, so you won't end up with extras. 

All of our products are competitively priced so we can offer you the best deal possible. We also offer fast shipping turnaround times and free shipping on qualifying orders. No longer need your underlayment screws? With our 100 percent hassle-free return process, you can return the screws unused and in the original packaging for a full refund. 

Browse our selection of Simpson MTH underlayment screws today to find the perfect fit for your flooring needs. These premium-grade screws will help keep your floors squeak-free, provide enhanced underfoot comfort and help flooring last over the long-term.