How To Take A Core Sample On A Flat Roof

Core samples may be weighed dried and re weighed to provide a quantitative measure of moisture content.

How to take a core sample on a flat roof.

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 method and process of core sampling is therefore important. Core samples consist of cuts through the roof membrane down to the roof deck. One method of taking a core sample is with a special tool developed by the cold regions research engineering laboratory called a crrel cutter.

The core cut also permits the constituents of the roof system and their condition to be determined. To determine the true moisture content of a roof system core samples need to be extracted from the affected roof areas. Critically this should be at random locations on the roof not in a straight line. Whether one is taking core samples for the purpose of evaluation or design one of the primary purposes is material identification.

Why take a core sample. The crrel cutter saws a 2 diameter hole in the roof. One end has saw teeth cut into the pipe the other has a place to insert a steel rod. How to take a core sample of a roof.

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. 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. Samples of your roof will be neatly cut out in areas of dry medium and heavy moisture presence using a specialist cutting tool appropriate for your roof s material. This tool consists of a 12 long 2 diameter pipe.

The core sample technique should be as follows. Taking core samples from flat roofs the right way. Take one core sample mid way. How to take a core sample of a roof.

Skip navigation sign in. The sample provides an absolute test of moisture content and location.