Roof Overlay Board

It s for this reason that many people choose to go with an overlay roof rather than a full tear off. 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. Ideal for re roof applications or as a new substrate for a modified bitumen or bur roofing membrane asphaltic cover boards are dimensionally stable providing strength and durability.

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Under construction proprietary overlay.

Roof overlay board.

That process can be time consuming and messy so. This is because you get to skip the whole process of tearing up the existing roof. The additional price is mostly related to the extra labor that goes into a tear off roof. Less expensive since you re simply adding another layer of shingles on top of the old roof your labor costs will be considerably.

1 4 dens deck roof board. R values 28 tested in accordance with astm c518 spannings. One major advantage of doing an overlay versus a tear off is the amount of labor involved. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles.

Installing wood stripping under a tin roof. Insulation joint tape section of this manual. 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. Asphalt and paraffin impregnated coated fibreboard roof insulation and insulation overlay board.

Where the roofstar guarantee standards or the roof system specifications call for taping fibreboard or insulation joints consult the list of accepted materials. It s light weight provides ease of handling. Labor for a new roof overlay. That is to say that laying down a new roof on top of the existing roof saves hours of labor.

Rigid roof insulation board. The roofing is manufactured in panels that. Count on iko for the best in asphaltic cover boards. 1 4 spans flute widths up to 2 5 8 flexural strengths parallel lbs.

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