How To Insulate Concrete Block At Roof Parapet

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.

How to insulate concrete block at roof parapet.

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. Watch as jose maldonado s crew attaches the foam insulation to the concrete cap of the block parapet wall. Terminate roofing on parapet wall with mechanically fastened termination bar. Then they cut foam to fit the top and sides of the wall and set it in a bed of mortar.

The cure for parapetitus is continuity of the control layers and letting things move when they have to move. Uninsulated rooftop connections for parapets hvac units solar equipment and other structures penetrating the roof insulation layer act like cooling fins creating a. 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. 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.

Thermal bridges at concrete parapets mitigated with structural thermal breaks new york ny parapets serve the vital function of protecting the edge of roof assemblies from uplift. Reduce heat loss by up to 90 while preventing mold growth where rooftop connections penetrate rooftop insulation. 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. After the adhesive cures add extension boxes to the outlets and switches and spray foam into every gap top bottom and around each box.

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. The final step is to finish the foam insulation in protective coat of galvanized wire lath and cement. The entire parapet in a layer of insulation. Roof membrane must lap up wall to minimum of 12 above roof plane or per specifications whichever is greater.

The solution was to wrap the masonry in an exterior insulated finish system eifs including the rooftop parapet. Insulate within parapet wall cavity to depth of roof insulation if present. Another is to cast a structural thermal break between the para pet and the heated interior structure supporting it.