Over the past few years, PVC has become a popular product with architects, builders, contractors and homeowners. The perception of the product as a “plastic board,” and the associative concept of “plastic = cheap” is quickly being outweighed by its low maintenance and extended life span when compared to wood.
PVC shares several characteristics with wood. And like wood, PVC will expand and contract.
If expansion joints are taken into consideration during installation, this natural movement will have little impact. However, if the wrong paint is applied to PVC, the standards no longer apply. For example, if PVC is painted with a dark hue of ordinary latex paint, the product will often expand dramatically when exposed to direct heat from the sun – and this expansion can often be greater than the recommended spacing.
The result from this over-expansion is often buckled and deformed PVC.
To avoid this ugly and costly condition, PVC manufacturers recommend using a 100% acrylic latex paint with an LRV (light reflective value) of 55 or higher.
As a rule, the higher the LRV, the lighter the color.
For paint colors with an LRV of 55 or lower, use a paint that has been specifically developed for application on PVC. Using paint with an LRV below 55 allows the product to absorb excessive heat, which can cause PVC to bow, buckle or deform.
There are a number of paint manufacturers that offer special formulations for PVC products. And choosing the right paint can make the difference between years of satisfaction for the homeowner and PVC putting the moves on you.
Installation of Azek Products
This page offers a number of instructional videos and downloadable PDF’s concerning the installation of Azek products. Visit the Azek website here
Installing CertainTeed Products
For installation tips concerning Certainteed products, visit the CertainTeed website here
ENVIROGUARD™ Window & Millwork Painting Instructions
Precision Millworks offers a concise guide for painting their products here