Proper Roof Insulation

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.

Proper roof insulation. But there are small improvements many homeowners overlook that can make a huge difference. See the department of energy s doe ranges for recommended levels of insulation below. A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel. A properly performing roof takes more than just shingles.

An important part of installing any system of ventilation into your roof system is to make sure that there is a point of entry and a point of exit for airflow. Insulation level are specified by r value. Proper insulation is the best way to maximize comfort and minimize energy bills. Insulation is rated according to its r value or resistance to heat loss.

The most proper insulation level to use on ceilings are r 30 batts that are as thick as r 25 batts but fit into a 2x10 framing. This provides an insulating value of r 11 for 2 4 walls and r 19 for 2 6 walls. The higher the r value the higher the insulating value. But its open cell structure still allows moisture to escape.

Your roof works as a system proper attic insulation and a properly ventilated roof work together to keep your home cooler and more energy. In cold climates snow can enter the soffit and ridge vents melt and potentially cause rot. The table below shows what levels of insulation are cost effective for different climates and locations in the home. As a homeowner it is important that you review the soffit areas of the home for soffit vents.

R value is a measure of insulation s ability to resist heat traveling through it. The higher the r value the better the thermal performance of the insulation. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. You put a lot into keeping your home running.

The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Insulation puts the money back in your pocket by protecting your home from the elements and lowering energy costs. Standard fiberglass insulation has an r value of about 3 5 per inch of thickness fig. Similarly in coastal environments or in regions with lots of rain and wind moisture can be forced.

Get the most out of your home with proper roof insulation. Sprayed against the underside of the roof deck it seals against air movement eliminating the need for a vapor barrier or ventilation.