It is usually based on a number from one to five with five being the most durable.
Carpet par rating.
Both the carpet and the underlay will have a separate tog rating and a combined rating over 2 0 isn t really suitable for underfloor heating.
Homeowners are expected to understand that the higher the par rating number the more durable the carpet will be.
Winding the fiber around itself strengthens the resistance to crushing.
For example carpet with a 4 0 tarr will retain its original new texture appearance longer in various traffic conditions than carpet with a 3 0 rating.
5 i carpet 101 carpet 101 i 6.
Many carpet manufacturers have a durability scale they use to inform consumers.
The higher the rating the longer it will retain its appearance.
They might think the customer should select their new carpet based on price color and perhaps a durability rating like shaw s par rating system.
The par carpet rating system created by shaw industries designates a number from one to five rating carpet durability based on a typical family of four scenario.
After vigorous industry standard wear simulating 20 000 foot traffic the worn carpet is compared to an unworn piece to determine how the piece has changed.
It is based on a 1 to 5 scale.
A low rating is perfect for use with under floor heating while a high rating means the carpet and underlay already offer good insulation and therefore isn t suitable for under floor heating.
The par carpet rating system was created by shaw industries and designates a number from one to five rating a carpet s durability based on a typical family of four scenario.
Twist the number of times the fibers are turned in a one inch length.
What is the carpet par rating system.
Most internet sources say it is a rating created by the carpet manufacturer shaw.
While i m sure they go through a lot of trouble and expense to provide this rating system i personally think it falls short of being a trustworthy gauge for consumers.
I don t like their rating systems because i don t think it is an accurate true to life calculation.
The carpet padding also effects room temperature and some may say that the padding under the carpet does just as much or more insulating than the actual carpet itself.
Urethane padding has the highest r value of all padding choices.
I reached out to shaw and they stated par is not a rating they use.
Par rating is somewhat of a mystery but i included here because i get questions on it.
Performance appearance rating is a 1 5 scale that rates how well a carpet will perform over time.
Par rating the par rating system stands for performance appearance retention.
These ratings take into account the total of the carpet and not just how the face fiber will perform but they do not reflect any other variables such as staining maintenance and poor installation.
Par or performance ratings.
