Roof Overlay Board

One major advantage of doing an overlay versus a tear off is the amount of labor involved.

Roof overlay board.

It s light weight provides ease of handling. Installing wood stripping under a tin roof. Insulation joint tape section of this manual. Rigid roof insulation board.

1 4 dens deck roof board. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other. Less expensive since you re simply adding another layer of shingles on top of the old roof your labor costs will be considerably. That is to say that laying down a new roof on top of the existing roof saves hours of labor.

1 4 spans flute widths up to 2 5 8 flexural strengths parallel lbs. A flat roof that had been over coated with a liquid based system which itself is breaking down a bonded overlay would not be suitable although with some preparatory works a mechanically fastened overlay system might be an option. It s for this reason that many people choose to go with an overlay roof rather than a full tear off. Under construction proprietary overlay.

The additional price is mostly related to the extra labor that goes into a tear off roof. Labor for a new roof overlay. The roofing is manufactured in panels that. R values 28 tested in accordance with astm c518 spannings.

Asphalt and paraffin impregnated coated fibreboard roof insulation and insulation overlay board. This is because you get to skip the whole process of tearing up the existing roof. That process can be time consuming and messy so. Where the roofstar guarantee standards or the roof system specifications call for taping fibreboard or insulation joints consult the list of accepted materials.