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.

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. Take one core sample mid way. 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 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. Whether one is taking core samples for the purpose of evaluation or design one of the primary purposes is material identification. The core sample technique should be as follows. Skip navigation sign in.

This tool consists of a 12 long 2 diameter pipe. The crrel cutter saws a 2 diameter hole in the roof. 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. Take one core sample at a high point take one core sample at a low point and.

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. Taking core samples from flat roofs the right way. Why take a core sample.

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. Core samples may be weighed dried and re weighed to provide a quantitative measure of moisture content. Flat roofs core sampling technique. To determine the true moisture content of a roof system core samples need to be extracted from the affected roof areas.

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