Residential Oversheathing Roof Insulaiton

Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency.

Residential oversheathing roof insulaiton.

Remove existing roofing and non adhered underlayment to expose roof sheathing. R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. Start at the bottom of the roof and place the first piece of rigid foam insulation against the metal flashing starting at the center line. Insulated roof assemblies can be vented or unvented.

A roof over a vented unconditioned attic does not need to include any insulation. Made of a high density rigid polyisocyanurate core and coated glass fiber facer it combines the weather barrier and sheathing functions allowing completion of the building envelope to be faster and more cost effective. Over roof insulation the gable overhang has been cut flush with the wall sheathing. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun.

A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning. The base wall assembly generally remained unchanged with other materials used for air sealing and water management. 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. An addition to standard residential construction for a specific purpose.

The tight building envelope protects the wall system from water and air infiltration and contributes towards continuous insulation. However most cathedral ceilings and low slope flat roofs are insulated roof assemblies. With more than 60 years of being used nation wide insulfoam roof insulations are a proven value. Install insulating sheathing above the roof deck on existing homes.

Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles. With this kind of roof the insulation follows the slope of the roof. Goboard structural sheathing is an ultra lightweight yet durable waterproof alterna tive to heavy sheathing products. Also note that a new fully adhered membrane is installed on the original roof deck replacing the one installed 17 years ago is folded down to catch the top edge of the wall water control layer.

In fact all grades of thermo brace have been evaluated and permitted as a water resistive barrier wrb noted in irc section r703 2 and ibc section 1404 2. Nail it around the edges with roofing nails.