When wanting to keep something warm by wrapping it up in aluminum foil, should foil be shiny side in or out?
According to the Reynold's Company, it does not matterThe only reason it is shiny on one side is cuz of how they make itThey make it in double sheets and they pass it thru these huge rollersOne side is touching the rollers during the process and gets polished from the friction, and therefore is shinierMetals that reflect heat do so not because of their shininess, but because of their compositionAluminum is aluminum, whether shiny or notThe shiny side OBVIOUSLY reflects LIGHT better, thoughBut light is NOT heat.
My garage blown insulation quote of $ 1.65/sf includes of 10 in attic includes 440 SF attic space and 330 SF wall space.
First check if the current insulation is vented correctlyThat would be if you pull out a bit of insulation you should see a foam spacer between the wood/roof and the insulationIf not re-insulate using the proper venting with non-reflective regular craft faced insulationThe depth of the rafters is key to insulation propertiesIf you want you can increase the depth to put in better/thicker insulation by adding to the raftersSo if the rafter is 2 X 8 add 2 to make it 10 in depthA lot of work but worth itAlso when putting up insulation before you put up sheet rock put a layer of plastic 4mil thick at least, this also helps heat loss.
A rough estimate for hiring someone to blow insulation into a flat roof, cathedral ceiling or wall cavities is $2.00 - $4.00 a square foot depending on ease of access in your attic, or $2,000 -$4,000 for filling 1,000 square feet of empty roof space.
