Pole Barn Concrete Floor Vapor Barrier

Place 3 to 4 of clean and drained sand on top of the vapor barrier to decrease differential drying shrinkage and floor curling.

Pole barn concrete floor vapor barrier.

A vapor barrier under your concrete slab is essential for moisture prevention. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. Vapor barriers for slabs on grade. A vapor barrier under your slab will also protect you from harmful ground pollutants like radon gas.

A gentleman had recently erected a pole building and placed six ml 0 15 millimeter thick clear plastic visqueen as a vapor barrier between his sidewall girts and wall steel. However concrete slabs are vulnerable to moisture from the ground. Vapor barriers have been associated with certain concrete slab on grade problems including curling and cracking. In other words all conditioned post frame buildings require controlled mechanical ventilation in order to breathe.

Run vapor barrier up sides and onto top of 2 8 splash planks overlap seams by at least six inches and tape them securely. That s why in most cases a vapor barrier should be installed under the slab. Pouring a slab on grade is a common way to lay a sturdy floor or foundation where a basement or crawlspace is unnecessary. That air condenses on the cooler concrete floor.

Controlled mechanical ventilation should be used to control and limit interior moisture levels in severe cold cold and mixed climates as well as to limit other interior contaminants in all climates. Always install a good vapor barrier such as a2v reflective insulation available through hansen buildings below any interior pour to stop moisture from traveling up into slab through capillary action. Vapor barriers are used because while fresh concrete is poured wet it s not supposed to stay that way. You should install a well sealed vapor barrier under your slab while code requirement is 6mil 15mil is far less likely to be damaged during a pour.

Post frame buildings with metal roofs and especially buildings with minimal insulation hold warm moist air.