From flat to cathedral in fhb 192.
Insulating attic rafter with chimney.
With a warm roof the usual process is to split the insulation into two layers.
If the plastic sheeting is in pieces overlap the pieces by 8 inches and staple it in place directly to the roof rafters and the wall.
R value for fiberglass or wool batts per inch is between r3 and r3 5.
We love our diyers so take up our incentive to improve your attic insulation situation yourself.
Batt insulation packages contain more square feet than rolls.
If the rafters are deep enough it may be possible to use rigid foam as the ventilation baffles sealing along the perimeter of each piece to create an air barrier then filling the rest of the cavity with batts or blown insulation see ceiling remodel.
Hire a pro to install spray foam insulation.
If there is a floor you will need to remove it to properly insulate the roof rafters.
By stapling the foil sheets to your attic roof rafters you can reflect the heat that hits the rafters back down into your home s living space.
Ibc dictates acceptable placement and composition of roofing materials in chapter 15 but describes required thermal efficiency of the roof in chapter 13 which references the international energy conservation code iecc the minimum required thermal resistance varies.
Do not use plastic sheeting in this case.
Fill every joist space completely and evenly with the insulation leaving attic vents uncovered.
Find a pre screened local home insulation contractor.
If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters.
It makes adding insulation to your attic a breeze.
Level uneven spots with a rake.
You can use rigid foam panels or do as tom silva does with nearly all houses these days.
Roof insulation configurations for unvented rafter truss assemblies.
Get a free 24 hour blown in machine.
Images courtesy simpson gumpertz heger.
Rolls are usually used for long expanses such as length of floor for entire attic while batts are fit between studs in attic rafters.
Place the plastic sheeting on top of the rolled insulation.
For houses with 2 6 rafters it s necessary to increase rafter depth to make room for enough insulation to meet code minimums.
While insulating your attic space with foam can be an effective way to lower heating costs you can use a simple reflective foil material as a cost effective alternative.
You get a free blown in machine.
With a helper to load the blower with insulation as needed start at the perimeter of the attic and work toward the attic access door.
