How To Insulate Concrete Block At Roof Parapet

To insulate the parapet the crew attached 2x4 nailers to the poured concrete top cap of the masonry parapet wall using cut nails and powder actuated gun nails.

How to insulate concrete block at roof parapet.

Terminate roofing on parapet wall with mechanically fastened termination bar. The perimeter of the roof assembly insulation is wrapped to prevent interstitial airflow from the parapet into the multilayered rigid insulation of the field of the roof. But insulating the new block structure to passive house enerphit levels was a challenge. Then they cut foam to fit the top and sides of the wall and set it in a bed of mortar.

Watch as jose maldonado s crew attaches the foam insulation to the concrete cap of the block parapet wall. Uninsulated rooftop connections for parapets hvac units solar equipment and other structures penetrating the roof insulation layer act like cooling fins creating a. For steel stud concrete and masonry block parapets connecting the roof insulation to the wall insulation using a structural thermal break under the parapet wall creates continuous insulation and minimizes the heat loss due to thermal bridging. Roof membrane must lap up wall to minimum of 12 above roof plane or per specifications whichever is greater.

The final step is to finish the foam insulation in protective coat of galvanized wire lath and cement. Insulate within parapet wall cavity to depth of roof insulation if present. Max baker and stonewall jackson would be proud. Now as you glue the panels to the exposed concrete blocks leave a inch gap at the floor and ceiling and cut holes in the panels to fit around outlets and wall switches.

After the adhesive cures add extension boxes to the outlets and switches and spray foam into every gap top bottom and around each box. Insulate concrete parapets and steel rooftop penetrations. Reduce heat loss by up to 90 while preventing mold growth where rooftop connections penetrate rooftop insulation. Another is to cast a structural thermal break between the para pet and the heated interior structure supporting it.

Depending on the density of the blocks an 8 inch thick block wall without any other type of insulation has a thermal resistance value between r 1 9 and r 2 5. Detail 1 7 brick veneer concrete block detail of low parapet with protected membrane roof detail 1 8 brick veneer concrete block detail at high parapet detail 1 9 brick veneer concrete block detail at high parapet. The entire parapet in a layer of insulation.