Pole Barn Concrete Floor Vapor Barrier

It needs to dry and then stay dryto avoid flooring problems.

Pole barn concrete floor vapor barrier. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. However concrete slabs are vulnerable to moisture from the ground. Vapor barriers for slabs on grade. 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.

A vapor barrier under your concrete slab is essential for moisture prevention. A vapor barrier under your slab will also protect you from harmful ground pollutants like radon gas. Place 3 to 4 of clean and drained sand on top of the vapor barrier to decrease differential drying shrinkage and floor curling. Post frame buildings with metal roofs and especially buildings with minimal insulation hold warm moist air.

Pouring a slab on grade is a common way to lay a sturdy floor or foundation where a basement or crawlspace is unnecessary. That s why in most cases a vapor barrier should be installed under the slab. Vapor barriers are used because while fresh concrete is poured wet it s not supposed to stay that way. 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 have been associated with certain concrete slab on grade problems including curling and cracking. 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. Most often we see 1 2 rebar on a 16 grid. That air condenses on the cooler concrete floor.

Run vapor barrier up sides and onto top of 2 8 splash planks overlap seams by at least six inches and tape them securely.