ASTM D751 and High Temperature Dead Load Testing

Many of the physical property testing methods listed in the various generic membrane standards from ASTM have their origins or reference in ASTM D751 Standard Test Methods for Coated Fabrics.  The physical properties used in the membrane standards evaluate thickness, tensile, tear, breaking strengths, elongation and a host of other membrane characteristics.  When looked at individually they appear to be either evaluating or characterizing the compound or the fabric reinforcements only.

Seaman Corporation developed and has been utilizing a test method that evaluates the actual integration of the compound and fabric together for better than 50-years.  The test has its roots in the high performance architectural fabric business that Seaman Corporation pioneered in the 1960’s.  The test measures the shear load carrying capability of the welded fabric.

Like roofing, the architectural fabric industry requires reliable membrane weld strength and integrity in order to perform.  And high temperature dead load testing is one of the most extreme measures for weld and membrane integrity there is.  It is listed in ASTM D751 but few people realize this.

The test involves suspending a weight from the end of a 1-in strip of welded membrane while being heated in a laboratory oven.  And even though the test was developed for architectural fabrics, Seaman Corporation evaluates the quality of our manufacturing process for FiberTite according to the same criteria.  The requirement for FiberTite is that it holds 50% of its breaking strength at 165°F for 4-hours.  That means that the 1-in welded sample of our nominal 36-mil membrane must hold 150-lb at 165°F for 4-hrs without deformation, slippage or yarn pull-out.

The photo attached to this article shows nominal 36-mil FiberTite (membrane on the left) during testing alongside two competitive membranes.  Now we know it wouldn’t be fair to subject the competition to the same robust load as FiberTite so we just expected them to withhold 50% of their own breaking strength.  No such luck as the photo clearly illustrates and to date we have yet to find a competitive membrane that can pass the high temperature dead load test alongside FiberTite.

If you’re looking for an ASTM test to really ensure that your expectations for a long term, high performance membrane is installed on your roofing project, use ASTM D751 Dead Load requirements in your specification.

Add new comment

Full HTML

  • Shortcodes usage

  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Image CAPTCHA

Enter the characters shown in the image.

About Mr FiberTite

After 10-years in Local 88 out of Canton Ohio, the opportunity to drink the FiberTite Kool Aid came in 1984.  Since then I've been a student as well as a teacher in all manner of roofing with a focus on the engineering, design and installation of thermoplastic single ply roofing systems.  The industry is growing in complexity so there's plenty of opportunity to learn and sharpen your skills no matter who you are.  Hence, one of the most important things I've learned is that "to sharpen the blade, you have to rub steel with steel".

Disclaimer

FiberTite® is a Registered Trademark of Seaman Corporation.  The views and opinions expressed on this site are not necessarily those of Seaman Corporation.

NMR Spectra
August 29, 2015

What is the proper amount of Ketone Ethylene Ester (KEE) to achieve optimum performance properties in a roofing... Read More

Comments: 0
Safety
August 09, 2015

Before any consideration is given to stepping on a ladder or the roof for that matter, a safety meeting should be... Read More

Comments: 0
Asphalt Compatability using Fibertite
April 03, 2015

Periodically we get questioned on FiberTite’s compatibility with asphalt.  I assume these questions are in response... Read More

Comments: 1
March 29, 2015

This week I took a trip to Cedar Rapids, Iowa to meet and present to what I consider the toughest venue in the... Read More

Comments: 1
March 22, 2015

Yesterday was the first day of spring but the idea that “spring is in the air” hasn’t really materialized.  It’s... Read More

Comments: 0
March 11, 2015

Fear of puncture on a single ply roofing system is probably one of the most pervasive issues that owners express... Read More

Comments: 0
March 05, 2015

Many of the physical property testing methods listed in the various generic membrane standards from ASTM have their... Read More

Comments: 0
Truth Scuff Test
February 15, 2015

This video initially crossed my desk last year but it continues to resurface.  It was produced from our friends at... Read More

Comments: 1
FiberTite Sales Team
February 08, 2015

Just what is a World Class Sales Force and how do you know if you have one.  Personally I believe this is as much a... Read More

Comments: 1
January 31, 2015

In 2011 Mr. Richard Fricklas, one of the roofing industry’s most respected experts, published a short article titled... Read More

Comments: 2
January 23, 2015

The FiberTite Toughness Test has apparently peaked the ire of our friends at GAF.  GAF submitted an article on the... Read More

Comments: 2
January 18, 2015

When purchasing a roof system one of the most important considerations is whether or not the product will be durable... Read More

Comments: 1
January 17, 2015

Just exactly what are the benefits of installing landscaping your roof top?

Some of the justifications for... Read More

Comments: 0
January 10, 2015

When you’re looking for a roofing system, you want one that has the least amount of variables required to ensure... Read More

Comments: 0
DuPont Elvaloy KEE
January 09, 2015

Today the market finds itself facing a new Elvaloy / KEE proposition from a number of manufacturers claiming to know... Read More

Comments: 0