Insulating Tongue And Groove Roof

Building a structural tongue and groove roof deck.

Insulating tongue and groove roof. The largest vent cross section available 10 sq in. Strong lightweight pink foam panels don t require special tools. The lightweight moisture resistant and thermally efficient type iv extruded polystyrene foam insulation is suited for a wide range of residential and commercial construction applications. Ceilings such as this are usually insulated with six or eight inches of rigid insulation on top of the tongue and groove then a layer of plywood is screwed on thru the insulation to the tongue and.

This is often a layer of tongue and groove boards nailed to the exterior side of the exposed rafters. Styrofoam brand tongue and groove extruded polystyrene foam insulation xps features tongue and groove edges on all four sides of 2 x 8 boards 1 thick or less and on the long edges of all other boards. Exclusive tongue and groove design reduces heat loss up through panels. Tongue and groove boards were used for decades prior to the widespread adoption of plywood as a sheathing material in the 1950s and 1960s.

The house has a cathedral ceiling throughout with tongue and groove boards attached directly to the roof joists. Say what you want about them but osb and plywood do not offer a very attractive finished look. I ve seen a lot of problems with insulated cathedral ceilings especially those with tongue and groove planks instead of sheet rock. There are currently old fiberglass batts up there for insulation right on the tongue and groove boards with some space above the fiberglass for air to pass through we have large continuous soffit vents on the front and back eaves and a continuous ridge vent.

Because of potential moisture issues i would personally never use a loose insulation like fiberglass in these ceilings. Tongue and groove board edge to reduce gaps and eliminate drafts. The insulation for exposed rafters is installed on the exterior side of the finish ceiling. Foamular extruded polystyrene xps rigid foam insulation offers a comprehensive line of products in a wide choice of sizes thicknesses and edges with a lifetime limited warranty for the life of the home or building.

Over 86 open for up the slope ventilation. Moisture goes right through fiberglass and will condense on the cold underside of your roof. The main reason to use tongue and groove boards these days is appearance from beneath the roof. Find all the facts and ideas about it in this article before you install one for your home design.