How do you Frame Window and Door Openings?

What is PreBuck?

This waterproof material looks like an LVL, but it’s built specifically for ICF projects, primarily for doors (though it works for windows too!). One of its standout features is durability—PreBuck won’t swell more than 3/16 of an inch, even under challenging conditions.

How Does PreBuck Work?

PreBuck has a unique design that bonds securely to concrete. The grooved side faces inward, allowing concrete to grab onto it, forming a solid, stable bond that resists shifting. Additionally, a metal strip attaches to one side, which is nailed to reinforce the ICF blocks during the pour. This setup keeps the form steady and ensures a strong, lasting opening.

Why Use Wood in Door Jambs?

When installing doors, we use wood in the jamb because it allows for stronger anchoring. Carpenters can secure the door with long screws, making it much sturdier than relying solely on nails or nail flanges. This technique helps prevent any issues with the door shifting over time.