New Webinar Hones in on Superior Classroom Acoustics, Evidence-based Design

7403731050_9a1ee480deWhen classrooms are too noisy, learning is significantly impacted. There’s a compelling body of research that supports this notion. I’ve also had the opportunity to witness it first hand through our work at Slatington Elementary.

The good news is that there are readily accessible, achievable solutions that support high-performance classroom acoustics and meet applicable code requirements. In a new webinar, “Creating Superior Acoustic Environments in Schools with Evidence-Based Design”, I will outline specific recommendations on remediation techniques along with specific wall design and installation solutions.

The webinar, scheduled for Tuesday, September 24 from Noon – 1 p.m. EST, will also include the following learning objectives:

  • Identify the benefits of evidence-based acoustical design and distinguish key acoustic performance criteria necessary to create a superior acoustic environment
  • Understand the major factors affecting acoustics and speech intelligibility in classroom spaces
  • Examine the results of an elementary school classroom acoustics case study
  • Identify relevant code requirements and detail how to specify construction materials and methods for sound control

To join this free webinar, which is eligible for AIA continuing education credits, click here to register.

 

A Sustainable Behemoth in the Making – The Saint-Gobain/CertainTeed New Headquarters

Image 01There is an old saying “You can’t make a silk purse out of a sow’s ear.”  Well, that is exactly what Saint-Gobain and CertainTeed are doing at our new headquarters in Malvern, PA.

This is a very exciting time for our Company as we ‘walk the talk’ when it comes to sustainability and performance of our own products.  We are engaged in a full renovation of a building that was the former home of a large insurance company but has been vacant for a decade..  With our building products we are transforming the building – inside and out – to a state-of-the-art sustainable, living laboratory for our products and systems that should qualify as USGBC LEED Gold.

Because this is our building it gives us the opportunity to practice all the things that we preach on a daily basis to the market about our products. This is an opportunity to create our environment, live in it and monitor how our products perform. It is also an opportunity for all of our sister businesses to come together and address challenges such as indoor air quality, managing office acoustics, daylighting issues and overall comfort throughout the work day.

This project has generated a great deal of excitement for all our employees and we will have a great deal to talk about over the next year in our blogs because it is a living, breathing example of building sustainably with sustainable materials and with an eye on the future.

There is no other building on the planet that will have this unique suite of dynamic products all working together to make a material difference in how we work so we can help others change the places where they work.

I hope you will check back frequently, follow our journey, along with the pains and woes that all people go through when building a building sustainably.  It should be educational and fun!

 

Mold: The Unwelcome Houseguest

mold on ceilingMold is a frequent and unwelcome guest in homes across America. So much so that the U.S. Environmental Protection Agency has designated September as Mold Awareness Month.

We at CertainTeed agree that mold is an issue worth addressing. As a manufacturer, we are able to help reduce the threat of mold by developing products that discourage its growth. We also devote significant building science resources to keep building professionals apprised of new information on this complex issue. Perhaps it’s this education, which ultimately trickles down to the homeowner that has the largest impact on mold. After all, it’s not just good materials and proper construction that keep a home mold-free. Good home maintenance is a key defense against the pesky guest.

We often refer to mold as the four-legged stool. It grows easily because it only requires air, water, a food source like dust, paint or fabric, and for the temperature to be between 41 to 104 degrees. In a home, these elements come together frequently so mold has the potential to flourish. Flooded basements or attic space beneath a leaky roof are high-risk areas for mold proliferation, but so are less obvious spaces like carpet near a wet potted plant. Mold spores can also enter a home through open doors, windows, heating, ventilation and air conditioning systems with outdoor air intakes. Spores can even attach to pets and people who unknowingly bring them inside on their bodies, clothes, and bags.

Homeowners are often able to remediate small areas affected by mold. A solution of one cup of bleach to one gallon of water can remove the unwanted fungus from nonporous surfaces. It’s important, however, that homeowners know to be careful to not mix bleach with other household cleaners and to wear disposable gloves and a protective N95 respirator during the remediation process.

For larger mold removal projects, or those affecting porous surfaces like drywall or insulation, building professionals with a solid understanding of building science should be the ones to clean away the mold. These professionals will also be able to safely remove materials and replace them with mold-resistant materials like fiber glass insulation or mold-resistant gypsum wallboard.

The good news is mold does not have to happen. Our building scientists often tout the five Ds to controlling mold. De-leak fixtures and holes, de-bubble wallpaper, dehumidify the indoor air, dry wet furnishings within 24 to 48 hours, and de-odor or fix the source of musty smells.

For more information on mold or Mold Awareness Month, visit http://www.epa.gov/mold/preventionandcontrol.html.

 

The Intricacies Behind Thermal Comfort

When you think about thermal comfort, what comes to mind? Insulation? Heating and cooling systems? The thermostat? Of course, these are all critical components to interior spaces that are conducive to happy, productive occupants. However, to truly master the science of thermal comfort, a more in-depth investigation can be beneficial.

While radiation, air speed, and humidity might be the most studied aspects of thermal performance, let’s shift our perspective to that of the end user. Specifically, how do activity, age and clothing affect comfort in interior environments?

Believe it or not, studies by ASHRAE indicate that clothing has very little impact on comfort. To reach this conclusion, ASHRAE used a unit of measure, clo, to determine the insulating capacity of clothing. Clo is based on the amount of insulation that allows a person at rest to maintain thermal equilibrium in an environment at 70 degrees Fahrenheit in a normally ventilated room. The difference in clo, which equates to 0.88 r-value, between summer and winter fashion selections is roughly 1.5 clos — a miniscule factor in terms of comfort.

However, when you consider the age of occupants it’s a different story. A 25-year-old employee bouncing off the walls and drinking a Red Bull experiences comfort much differently than a 50-year old manager who sits at a desk 8-plus hours a day.

Why? The rate of metabolism, which is influenced by age among other things, can create an awful lot of heat.  Since heat production varies from person to person, individual actions are taken to reach equilibrium that impact the entire space, such as opening a window, allowing more sunlight into the area or adjusting the thermostat.

The lesson here is that architectural professionals and building owners should be mindful of age in their designs to ensure long-lasting comfort for building occupants. For those of you that want to take a deep dive into the nuances of thermal comfort, check out ASHRAE 55-2013.

Thermal Control in Building Envelopes

Like so many things we encounter in our lives when it comes to thermal comfort in a building, it is not a one-size-fits-all scenario.  That is why it is so important to understand the thermal performance of materials but also their water vapor and air resistance properties and how they will interact in the wall assembly.

Whether specifying materials for a new construction or for a renovation it is important to have a thorough understanding of how all the components in a wall assembly will play together to get the desired outcomes for the building.

Indoor comfort is critical for human health and performance and so starting with a space that has been designed for optimal thermal performance is crucial.

Join me on Tuesday, June 3 at noon for a deep dive into Thermal Control in Building Envelopes.  After this 90 minute free webinar you will be able to:

  • Describe the three modes of heat transfer
  • Understand the thermal properties of building materials
  • Describe how to calculate the thermal performance of insulated wall assemblies
  • Describe how to insulate different types of wall assemblies
  • Describe ways to increase the thermal performance and moisture durability of roofing assemblies
  • Understand the thermal performance attributes of fenestration products – windows, curtain walls, and doors
  • Understand how thermal control in building envelopes can help earn points in the LEED rating systems

This course is GBCI approved and AIA approved for 1.5 LU.  Remember to bring your questions!

 

Don’t Confuse Product R-value with Assembly R-value

Martin Holliday

Martin Holliday

In his Blog, Musings of an Energy Nerd , in the Green Building Advisor Martin Holliday, who has been in the industry for a very long time, revisits an old topic regarding the performance claims of a certain type of insulation that we call bubble wrap. The performance claims are greatly misunderstood by most people due to the ignorance of even semi-professionals to the specifics upon which these claims are based.

The bubble wrap claim of an R-value of 8 is usually based upon its performance in an assembly not as a material by itself. They do not usually describe the assembly in which this rating is achieved when they state that performance. These products have a radiant barrier component to them and if you attend my webinars where we discuss heat flow, air flow and moisture flow – this is one of three modes of heat flow – you know that radiant barriers only work when installed adjacent to an air space. When you look at a project where they say that the product has a R-value of 8 they may have failed to mention that it was installed over spacers over a 2 inch air space when it was tested. You may not have that same scenario in your assembly.

In his article, Martin provides examples of claims that have been proven false. What was insightful to me regarding these claims is that the false claims are being repeated or made by the big box retailers who carry significant weight with consumers and DIYers. This is problematic because claims being made by a large influencer means consumers are being misled and installing a product that they think is an R-8 material when it is really an R-1 material. When their energy bills skyrocket, they are forced to redo the work and pay again to make it right.

The manufacturers have been held accountable for false claims, but who is monitoring or holding accountable, outside of Martin, when false claims or misleading information is being given to consumers at a retailer?

That is one of the reasons that using a professional contractor or installer is money well spent.

The Risks of Poor Acoustics in Healthcare Settings

CTC_Gyptone_Big_Curve_yellow_818x474Longer hospital stays, higher readmission rates, unnecessary medical errors, high stress among staff — these are just a few of the consequences of unwanted noise in healthcare settings. It is estimated that ambient noise levels in healthcare facilities have dramatically increased since 1972. In a UK survey conducted by the National Health Service, 40 percent of hospital patients cited noise was a major annoyance during their stay—outranking other factors such as cleanliness, quality of food, privacy and amount of staff. Additionally, new research indicates that the risk of a heart attack increases when measured noise levels exceed 65 decibels.

The good news? There are solutions. Join me on Wednesday, May 21 at 2 p.m. EST for a one-hour webinar dedicated to improving acoustics in healthcare settings. You can register for free here and earn AIA and USGBC credit.

Specifically, the Ceilings in the Healthcare Segment course will cover:

  • How evidence-based design is driving healthcare facility construction
  • Strategies for optimizing indoor environments for the best patient outcomes
  • The role of sound attenuation in protecting patient privacy
  • LEED® for Healthcare as it relates to ceilings and acoustics
  • Facility Guidelines Institute guidelines for ceilings in healthcare environments

The simple truth is that there is no excuse for poor acoustics in healthcare settings. Solutions for better acoustical control not only exist but are in reach — however, we need to ban together to truly make a difference for patients and hospital staff alike. To that end, we recently launched the “Down with Decibels” campaign and encourage you to join the movement.

 

 

 

Managing the Biggest Building Challenge – Moisture

We have reached the dessert portion of The Art of Building Science webinar series and it is definitely apple pie a la mode because it is jammed packed with information. A large portion of this session is focused on Moisture Management because that is the number one cause of premature service life in our built environment today. It is the one thing that we never, ever find a way to live with.

Moisture management is critical to everywhere we build because we build with water and water surrounds us. I have taken part in mold remediation projects in East Los Angeles so even in drought-ridden California you can experience excessive moisture at times. The only place on the planet that does not have moisture issues ever (at least for a very long time now) is the Atacama Desert in Chile.

Even if you haven’t been able to participate in the earlier sessions, join us Tuesday, May 6 at 5:30 pm EST. Of all the topics we cover in building science, moisture management seems to generate the most questions and the most confusion so it’s always a good time to refresh our memory and augment our knowledge. You can register right here for The Art of Building Science Part III – Moisture Flow. This course is AIA approved for 2 CEUs.

As we continue to see devastating weather systems throughout the US, designing and building to manage moisture is becoming increasingly important. Don’t miss this opportunity to learn more about controlling moisture in the built environment.

Don’t Risk Missing Points in LEED V4

LEEDv4If I put on my promotion hat on for a minute, I urge anyone using LEED to be aware of the transparency reporting changes between LEED 2009 and LEED V4. Both reward transparency points but in LEED 2009 they are found under the pilot libraries but in LEED V4 they are migrated down to materials and resources credits.

Since both programs will be in play until mid- 2015, it is important to know where to properly apply these transparency points from manufacturers that provide transparency documentation.

You can be awarded up to six points for transparency so, believe me, this is not something that you want to walk past these because it can cost you a fortune to make up six points somewhere else.

If you need to know the differences between LEED 2009 and LEED V4, I am running a webinar entitled Understanding LEED 2009 v. LEED Version 4on Tuesday, May 6 at 2:00 pm EST. My webinars are free of charge and qualify for AIA and GBCI credits.

In the spirit of transparency, I will cover the following objectives:

  • Identify key improvements in LEED version 4 compared to LEED 2009. Describe new credits applicable to building products and their requirements
  • Understand the new importance of products with Environmental Product Declarations (EPDs), Health Product Declarations (HPDs), and Extended Producer Responsibility (EPR) programs
  •  Identify products that improve energy performance, acoustics, daylight, waste management, and thermal comfort
  • Explain the importance of selecting low emitting products and materials to meet updated credit requirements

If you build for LEED, you won’t want to miss this session.

Tips for Checking for Mold Following a Wet Winter

Mold-in-basement2

Following this incredibly wet winter, it is a good idea to check to make sure that mold growth is not beginning inside or on your home. You may have noticed that the media has been talking about this on news programs of late.

Mold needs four things to thrive and liquid water is perhaps the most critical as it is the only one we have a chance of controlling. Having liquid water coupled with available oxygen, food and the temperature sweet spot, 41° to 104° F, is the perfect storm for mold growth. Here is what you should do:

  • Inspect your basement for damp walls or cracks where moisture can come in and seal them.
  • Fix plumbing leaks and other water problems as soon as possible. Dry all items completely. 
  • Scrub mold off hard non-porous surfaces with detergent and water, and dry completely.
  • On porous surfaces, in addition to surface cleaning you need to completely dry the material in order to prevent its reappearance. If that can’t be done, you may need to remove the material.
  • Inspect the exterior of your home at ground level. If water is collecting there, divert it away from the foundation.
  • If you find mold, make sure to cover your face and hands to minimize exposure when cleaning the area. It is also important to put a fan in a window and blow air from the room out of the house when you are working around the mold or you may disturb it. If it is a significant area affected or if you begin to feel “allergy type” symptoms when working around mold, call an expert to clean it out.

What humans typically react to are the mold spores which become airborne when it is in its “happy place” with food, water, and a cozy temp or when the mold is physically disturbed.  

We’ve made a lot of changes to how we build in recent years in order to conserve energy and live more sustainably. Many of the things we’ve done to improve our habitat have unfortunately created an ideal environment for mold to thrive. The only chance we have to keep mold from becoming a full-time member of our households is to eliminate the presence of liquid water in or on the materials we use to construct the dwellings.