Certainteed Vinyl Siding Installation Instructions: A Guide to Caulking and Cladding

When it comes to installing Certainteed vinyl siding, many homeowners wonder about the importance of caulking and cladding. While some may argue that caulking is necessary for aesthetic reasons or to keep out ladybugs, others may question its necessity altogether. In this article, we'll delve into the world of caulking and cladding, exploring the reasons behind it and whether or not it's truly necessary.

One common misconception about caulking is that it's solely used for aesthetic purposes. However, caulking serves a more practical purpose - to prevent water from seeping behind the siding. According to Joe Lstibrek from Building Science Corp., one of the primary ways moisture gets into and behind cladding is through capillary suction. This phenomenon occurs when the gap between the overlapping siding is too tight, allowing water to wicked or sucked up between the clapboards.

In a recent study, researchers found that retrofitting insulation into a wall cavity could potentially cause paint on the siding to fail. However, this study also highlighted the importance of proper caulking and cladding techniques to prevent moisture from entering the wall cavity.

So, is it necessary to caulk the underside of every plank? Not necessarily. Caulking can actually trap water behind the siding, preventing it from draining out. Instead, homeowners should focus on caulking areas where gaps are present, such as at corner boards and butt joints. Additionally, there may be some boards that don't lay tight to the ones underneath, which could benefit from a small amount of caulk.

When it comes to choosing a type of caulk, 100% acrylic caulk is a popular option for vinyl siding installations. However, it's essential to follow manufacturer instructions and guidelines to ensure proper application and adhesion.

In conclusion, while caulking may not be necessary under every plank, it plays a crucial role in preventing moisture from entering the wall cavity and behind the siding. Homeowners should focus on caulking areas where gaps are present and choose the right type of caulk for their vinyl siding installation. By doing so, they can ensure a watertight seal that will last for years to come.

Certainteed vinyl siding installation instructions