Today, the construction crew poured the concrete floor slabs for both homes. This wraps up the foundation of the homes; over the next several weeks, the team will begin framing the homes. Be sure to stay tuned as construction will surely speed up!
The construction crew completed installation of the underslab insulation today. This insulation, 2 inches of extruded polystyrene (XPS), will keep heat from escaping the concrete floor slab into the ground, and it will help to keep the concrete slab dry. Below the insulation is a layer of crushed stone to ensure that all water is able to drain away from the slab, keeping it dry and free of cracks. Before Envinity pours the concrete slab, they will lay down overlapping sheets of 6 mil polyethylene as a final layer to protect the concrete slab from water and moisture. All of this protection will make the slab warmer but will also keep it lasting for decades without issues of cracking or breaking.
Today, members from Envinity’s construction team were insulating the foundation of the GreenBuild homes. It’s often overlooked, but heat is able to escape the home through the foundation, in some cases, enough to actually melt snow surrounding the home! The GreenBuild homes are being built with 2″ of Extruded Polystyrene (XPS) rigid insulation to the inside of the foundation walls and under the first floor concrete slab; XPS insulation in a high-density foam insulation able to withstand the constant pressure of the floor slab and hydrophobic so that no water will enter the insulation, keeping it performing well throughout the lifespan of the homes. This insulation will reduce thermal bridging and help to keep the interior of the homes warm throughout the harsh Central Pennsylvania winters.
Today, Envinity really began construction by pouring the footers of the GreenBuild homes! The footers are the first step of the foundation; as the footers cure and harden over the next week, the crew will pour the foundation walls and begin insulating the homes. Because of the design team’s careful consideration of the site’s natural slope, some of the footers have to be stepped, a little extra work by the construction crew but a great way to reduce materials and impact to the site.