Blow In Insulation Vaulted Ceiling

So some people go to crazy lengths trying to reach r 40 or r 50 in their cathedral ceiling while their money would have been better spent on better air sealing better windows more efficient heating system or increased wall.

Blow in insulation vaulted ceiling.

The higher r value reduces condensation when moist interior air hits the now less cold ceiling vice versa in summer with humid outside air. Typically cathedral ceiling insulation is blown in from the roof. In order to do this you will have to remove pieces of the roofing material and drill a series of 2 inch holes across the structure in each framing cavity. But codes rarely make the distinction between attics and cathedral ceilings in the minimum insulation requirements.

In a vaulted ceiling however the only fresh air route lies between the insulation and the underside of the roof deck. Utilizing cellulose insulation contractors blow the cathedral ceiling cavity completely full and do away with the need for outside ventilation. Calculate the r value of your vaulted ceiling based on the existing insulation. I have a mountain of insulation that i m creating and building this up.

Over here on this side you can see what it looks like to me right here is the ceiling and up in here is my little peep hole where i can see down in and i can blow mountains of insulation down there. According to the seattle department of planning and development batts offer an r value of 2 to 3 per inch while. First closed cell foam has a 60 percent higher r value per inch than open cell 6 3 vs. Step 5 blow the insulation.

To keep fiberglass batts from blocking airflow rafter baffles should be. Now we re going to do is blow cellulose in this hose all the way down to the cathedral ceiling bays and we have air baffles all the way down to the bottom so that air from the vents could get up and out the ridge vent. In fact as far back as 1975 ncima standard n 301 75 stated.