Insulation Roof Sheeting

There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam insulation above the roof sheathing.

Insulation roof sheeting.

Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. Install them using panel adhesive or screws. R 5 scored square edge rigid foam board insulation sheathing foamular extruded polystyrene xps rigid foam insulation offers foamular extruded polystyrene xps rigid foam insulation offers a comprehensive line of products choose the strength you need from 15 to 60 psi and exceptional moisture resistance.

The glass fiber reinforcement contributes to improved fire performance and dimensional stability. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. In warm climates zones 1 through 4 low density open cell spray foam insulation is the typical choice since it is vapor permeable and will allow drying of the exterior sheathing and roof framing if they happen to get wet via diffusion into the interior of the building. For the same reason insulation shouldn t touch the roof s underside.

The problem with the insulation against the sheathing expands. The moisture is held in place by the insulation which allows for damage to the framing and other building components. They re much lighter and easier to work with than plywood sheets. If there is a roof leak the insulation will be damaged by the water leaving you with less insulating value.

For new construction use rigid boards to insulate slabs and the outside of foundation walls. Smaller sizes are also available. Insulated roof assemblies can be vented or unvented. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow.

There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. Foam board sheathing insulation johns manville polyiso foam sheathing insulation boards provide a continuous layer of insulation to reduce thermal bridging and improve energy efficiency. Polyiso consists of a uniform closed cell polyisocyanurate foam core and provides one of the highest r values per inch of any rigid insulation. Working with home insulation boards insulation panels typically come in 4x8 foot sheets.

Thermax sheathing is a non structural rigid board insulation consisting of a glass fiber infused polyisocyanurate foam core laminated between 1 0 mil smooth reflective aluminum facers on both sides.