Open Vs Closed Cell Attic Insulation In Texas

Murmurs and hearsay about open cell spray foam insulation have been gaining traction for a while.

Open vs closed cell attic insulation in texas.

There are two types of spray foam. Closed cell foam can be over three times that with a density of 1 75 pounds per cubic foot or more. The higher the density the foam the heavier or stronger it becomes. Roofing applications typically use a 2 8 to 3 0 lb cu.

To support traffic and loads better. Open and closed cell foam insulation use a blowing agent to forms the cells within it. Both low density open cell and medium density closed cell spray foam can be used in an unvented attic to provide the needed thermal resistance and airtightness. Open cell foams typically weigh in at 0 4 to 0 5 lb cu.

An overview of closed cell spray foam insulation closed cell spray foam insulation is highly efficient. But now the attic isn t vented to outdoors. Closed cell foam is much denser than open cell foam. Closed cell foam for insulation applications range in density from 1 7 lb cu.

Closed cell foams use enovate also known as 245fa which is. Most open cell foam has a density of about 5 pounds per cubic foot. The attic is much warmer than outdoors in winter but significantly cooler than the living space if you leave the old insulation in the attic floor. Seems like you wouldnt want to seal something susceptible to mold growth but maybe thats just me.

Not long ago someone even told me that in florida roofing companies won t let their workers go up on roofs with open cell spray foam because the roofs are so spongy the guys fall right through. That makes the surface of the spray foam cooler possibly even below the dew point. Open cell is more susceptible to mold and mildew but its expanding so it can hermetically seal an area. Open cell foam is used in a wide range of applications such as for noise reduction in sound rooms home insulation metal buildings under roof deck for semi conditioned attics and more.

Open cell spray foam costs between 0 25 to 0 50 per board foot and closed cell spray foam ranges from 0 90 to 1 50 per board foot. Closed cell is denser better insulating. Open cell foams use water as a blowing agent. There are two types of spray foam insulation open cell and closed cell.

For bigger jobs such as roof attic floor and wall insulation you will. Diyers can use this foam for small jobs such as insulating door frames. The open cell polyurethane foam has an r value of 3 5 to 3 6 per inch with a price tag of 1 1 20 square foot. Open cell polyurethane and closed cell polyurethane.