As its name implies, a vapor barrier is a barrier that keeps vapor out. It generally consists of a plastic sheet or multiple layers of plastic sheets. The barrier can be rolled out and affixed to the floor and walls of your crawl space to prevent moistur
This is when the aircraft "breaks" the sound barrier. Birth of the Sonic Boom As the aircraft maintains supersonic speed, all the sound waves that should've dispersed in front of it pile up and form shock waves. When these pressure waves combine, a single shock wave forms. A sonic boom...
Vapor barrier: Next is thevapor barrier. This underlayment helps prevent the roof from developing condensation or moisture issues. Overlay board: The roofing professional will lay down an overlay board orcover boardnext, to support the torch down roofing membrane. Care must be taken to apply the...
I’ve written about the reason for this before. Basically, it’s thatcold air is dry air. The lower the temperature, the less water can exist in the vapor state. You may have a highrelative humidity,* but the actual amount of water vapor in the air (sometimes called absolute humidity ...
What Is a Barrier Board? What Are the Different Methods for Duct Installation? What is a Fiberglass Duct? What is an Aluminum Duct? What is an HVAC Duct? What is an Air Conditioning Duct? Discussion Comments About Mechanics, in your inbox ...
WHAT IS THE BEST CONCRETE SEALER FOR DRIVEWAYS? To simplify the selection process, I have broken down the most important factors to consider into three categories: Safety, Appearance and Performance. Just remember the acronym SAP. Safety
Humans have attempted to conquer the problems of changing water levels for thousands of years. One of the oldest weapons they've wielded against the rivers and oceans is the levee, also known as a dike. A levee is simply a man-made embankment built to keep a river from overflowing its...
Product Description OPERFECT™ housewrap is an excellent 100% synthetic roofing felt designed for the replacement of 15 lb/ 30lb asphalt felt. OPERFECT™ house wrap can be used for steep-slope roofing to provide a lasting layer of protection against wind-driven ...
Plastic on the outside of the wall, humid air inside Of course, you can have moisture problems here even without the exterior vapor barrier because of what Bill Rose calls the rule of material wetting. That is, warm materials dry more quickly than cold materials. ...
Blown insulation, also called loose fill insulation, is commonly used to insulate existing structures that previously had no insulation, or where additional insulation is needed. It is made up of loose particles which are blown into anatticor into wall cavities, which are the spaces between the...