Roof Insulation On Metal Deck

Air sealing hot roofs is critical.

Roof insulation on metal deck.

Armstrong world industries inc. Because the insulation is so close to the roof and you want to avoid unwanted moisture buildup these roofs will need to be completely sealed off. Our new smooth series cellular deck offers a blemish free beam to pan rivet. We then vented that space through the roof deck as was the normal practice for roofing.

It involves adding an air chamber under the roof deck. This type of fastening also is acceptable on other deck types including cast in place concrete and gypsum. Metal roofs are poor insulators. Insulation must secure properly to the roof deck to provide an acceptable substrate for the roof covering.

In this article we are going to explore both financial and technical aspects when it comes to looking for the best method to insulate the metal roofing. For most of us in the low slope roofing industry it s considered to be absolutely standard to have insulation placed above the roof deck. Three in one composite roof deck panels provide acoustics insulation and a nailable surface that accepts a wide variety of roofing materials. Talking about metal roof insulation this thing is one of the most challenging things people work in this field is facing it demands and requires excellent skill and expertise which you may only get from a reputable roofing contractor.

Tectum e tectum e n acoustical roof deck description. Free ventilation area of attic ventilation for every 150 sq. Vented attics have insulation installed underneath the roof deck in direct contact with the decking. Ceiling insulation is then installed on the attic floor.

Insulation with a thermal resistance of at least 0 85hr ft2 degree f btu or at least 3 4 inch air space is added to the roof deck over an attic or 7. For standard steel deck construction this approach has many advantages such as. Make sure there is adequate air flow from the eave vents to the attic area. Of attic floor area and where at least 30 percent of the free ventilation area.

In climate zones 10 12 and 13 with 1 sq. Heat and cold penetrate metal. Mechanical fastening with self tapping screws and plates is the most common and approved method for insulation attachment on steel and wood roof decks. On one project in kansas we installed 1 x 1 along both sides of the rafters and then added 3 8 plywood to them.

The dew point is typically within the insulation layer lowering condensation risks. Remove existing roofing and non adhered underlayment to expose roof sheathing. This retrofit assembly is appropriate for homes with conditioned attics or where the retrofit is intended to create a conditioned attic. Metal roofs are durable and last much longer than conventional roof deck and shingle constructions but they come with a drawback.