Metal laths in waterproofing systems: role and advantages

Once you realize that your deck needs a waterproofing system, you will see all the different steps and materials used for a quality coating. If you're not a complete expert on waterproofing, you'll learn a lot that expands your knowledge. One of them is the use of Metal laths in waterproofing systems. This backing material is very useful in providing reinforcement to the primer on your deck. You often see this described as a steel-based product used to reinforce surfaces.

One of the great advantages of Metal laths is that it can be combined with other products. As a result, you have an easier-to-adhere frame for a variety of surface materials. While this gives you a basic overview, let's learn more about how Metal laths work for your deck and the different styles of slats available.

Provides a more stable and adherent surface

Metal laths are often the third option for basic waterproofing systems used on decks. For plywood decks, many choose to use a polyurethane system that is applied directly to the surface with a roller. One thing about polyurethane, however, is that it requires multiple layers to provide thorough protection. This may not always be the best option when you have a lot of traffic on your outdoor deck.

Another option is a cement resin in a variety of mixtures. Most commonly, you'll see acrylic polymers and cement used on plywood surfaces. This also usually requires multiple layers for maximum protection.

Metal laths are the typical third option mentioned above. Any system that uses slats will use galvanized metal mesh to provide a very stable surface with extremely high adhesion.

Advantages of Using Metal laths When you apply Metal laths to an existing deck surface, you will be able to apply a polyacrylic emulsion primer for greater durability and an even finish. This will prevent cracking when you have a lot of foot traffic or bad weather.

After that, you can apply a top coat, giving you more creative options in terms of color and texture. With the slats below, you'll have a more affordable option that will last you for years. Even better, it doesn't require a lot of maintenance, which you'll appreciate if you have a busy life.

The slatted system can be easily applied whether or not you have used a non-slatted coating in the past.

Different kinds of Plaster Metal laths available

Many people use Metal laths for stucco, although different varieties are available, depending on what is needed. Expanded mesh slats use galvanized wire and are often used on many uneven surfaces. It's also available in fur and non-fur styles, which provide a sturdier base. Many in the industry refer to it as diamond mesh plasterboard.

You also have extended rib slats, which are similar to the one above with the addition of reinforcing ribs.

Wire slats are another option, also known as welded wire or chicken wire.

Lath is another, something that was used in the early days of metal lath, but has been used more frequently recently.

Be careful when using metal slats

When your waterproofing professional arrives to apply the metal slats, you need to prepare your deck before doing any work. Surfaces require complete removal of any dirt, oil or foreign matter. Your crew can clean your deck before using the slats.

Also, the wood frame must be strong and durable, and may need to be checked to make sure you don't have the plywood spoiled.

All joints in the deck base plate require 1/8 inch clearance before applying the slats, which is APA compliant. Any gaps in the substrate will need to be covered with seam tape.

Any connecting edges of overlapping slats are an important step in the installation process to prevent any future cracking.