Re Roofing Insulation

Expect to pay anywhere from 10 to 50 percent more for cool roof shingles.

Re roofing insulation.

When comparing these products look for the highest numbers in solar reflectance and thermal emittance both on a scale from 1 to 100. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Nesting each new row below an existing one keeps the new nails 2 inches below the existing which will help minimize any splitting of the sheathing. With more than 60 years of proven performance nation wide insulfoam roof products are a trusted value.

With the old 2005 title 24 energy code a residential cool roof was an optional energy efficiency measure however on january 1 2010 cool roofs are now required for most. Commercial roof insulation insulfoam offers the widest range of faced laminated and standard high performance eps insulation products for all your new and re roofing needs. See the department of energy s doe ranges for recommended levels of insulation below. Ensure that the ratio of rigid foam air impermeable insulation to cavity insulation air permeable insulation meets the code requirements to avoid condensation.

You can achieve r 38 with 10 inches of eps 8 inches of xps or 7 inches of polyiso. Install polyisocyanurate rigid foam insulation over the air control layer. Use galvanized roofing nails long enough to fully penetrate the sheathing typically 1 1 2 inches for a second roof and 1 3 4 inches for a third. If your roof assembly has no insulation except 1 4 inch of rigid foam you really need to install r 38 insulation on your roof.

There are also provisions for fire classification weather protection re roofing roof drainage and solar power. It s easier to knock out in a weekend and it s more relevant to most people s goals when it comes to insulation. That is the minimum code requirement. If you follow my advice you will dramatically reduce your energy bills.

With more than 60 years of being used nation wide insulfoam roof insulations are a proven value. California roofing requirements under the california residential code cover everything from what suitable materials to use to requirements for roof coverings to roof insulation. Roofing insulation starts with insulfoam. Install insulation cover board and roofing membrane with flashing as the water control layer.

Some shingles are energystar rated. Another thing to consider is whether you should do it yourself or call on the professionals. The general consensus is if in doubt attic insulation takes priorityover direct roof insulation. Residential roof insulation insulfoam offers a wide variety of faced laminated and standard high performance eps insulation products for all your new and re roofing needs.

Others have been tested by the cool roof rating council.