How To Take A Core Sample On A Flat Roof

The core sample technique should be as follows.

How to take a core sample on a flat roof.

How to take a core sample of a roof. The sample provides an absolute test of moisture content and location. One method of taking a core sample is with a special tool developed by the cold regions research engineering laboratory called a crrel cutter. Taking core samples from flat roofs the right way.

Tyler showing how to take a core sample out of a roof also known at best roofing as a roof cookie core samples consist of cuts through the roof membran. The inspector observes and documents the composition of the roof membrane cover board insulation vapour air retarder thermal barrier and roof deck layers thicknesses and method of. The crrel cutter saws a 2 diameter hole in the roof. This tool consists of a 12 long 2 diameter pipe.

The roof will be penetrated through the membrane down to the deck in a cut between 4 and 12 inches in size and each sample will be taken away in an airtight container for scientific analysis. The method and process of core sampling is therefore important. One end has saw teeth cut into the pipe the other has a place to insert a steel rod. Take one core sample mid way.

Skip navigation sign in. If you are an estimator for a company involved in the residential or commercial roofing industry you are aware of how important a core cut is to developing qualified bids for your roofing. Why take a core sample. Critically this should be at random locations on the roof not in a straight line.

The core cut also permits the constituents of the roof system and their condition to be determined. Core samples may be weighed dried and re weighed to provide a quantitative measure of moisture content. Core samples consist of cuts through the roof membrane down to the roof deck. To determine the true moisture content of a roof system core samples need to be extracted from the affected roof areas.

Take one core sample at a high point take one core sample at a low point and. Whether one is taking core samples for the purpose of evaluation or design one of the primary purposes is material identification.