Tag Archives: best building practices

Excellent Q&A From Frank Woeste via Journal of Light Construction – Drainage Problems on Low Slope Roof Decks

I’ve had this Q & A page at JLC online on my to do list for a while now to post up here for you all…while the discussion is about drainage problems on low slope roofs, the photo they use is a deck over living space with tile on it and ponding water. And of course, decks over living space with tile or pedestrian traffic coatings on them are roofs as well, just that we walk on them too.

Frank discusses how a roof deck can pond water even when it’s “built to code” from loads placed on the deck. Recommended reading for designers, architects, builders, waterproofers and anyone interested in increasing their knowledge and skills.

Drainage Problems on Low-Slope Roofs

By Frank Woeste

Q. Can deflection of a low-slope roof cause ponding? How can this be avoided?

A. Frank Woeste, P.E., professor emeritus at Virginia Tech, responds: Historically, structural designers and builders have assumed that a design slope of 1/4 inch per foot (1:48) is sufficient to prevent ponding action, thinking that the installed roofing system will maintain at least a 1:48 slope in-service as required by some roof covering systems. However, in many cases and for different reasons, ponding on limited areas of low-slope roofs is common. That’s due to roof deflection, which over time can cause water to collect in some areas of a roof where the design slope for drainage is not adequate, and in fact changes from a “positive” drainage slope to a “negative” slope (see photo below).

  DOWNLOAD THE PDF VERSION OF THIS ARTICLE. (666.96 KB)

Life Specialty Coatings Product Demo February 10th in Santa Fe Springs

Life Specialty Coatings announced their first product demo of the year at their headquarters in Santa Fe Springs CA.

Located at 12927 Sunshine Avenue in Santa Fe Springs, the demo will start at 9 am and run through till 1pm. Come for some of come for all, reps will be showing how to install their AL system the AL-flex system MC system and the FM system as well as discussing decorative overlays with stains and some of their new products that they are introducing.

Continue reading Life Specialty Coatings Product Demo February 10th in Santa Fe Springs

When Words Kill: Lessons From The Champlain Tower Collapse

The author makes some very good points for consultants to consider… Using language that everyday people will understand. Especially when it comes to condominium boards of directors.

There are many things to consider when doing a visual inspection and certainly one of them is how bad is the degradation of concrete? Since a visual is only limited to what we can see and we don’t have x-ray vision there can certainly be damage inside of concrete that we are not aware of… Unconsolidated concrete rebar that isn’t properly tied sized etc. Hidden water damage may also exist.

Continue reading When Words Kill: Lessons From The Champlain Tower Collapse

Coming Soon! DeckExpert.com Best Practices Video Series!

We’ll be doing quick 3 to 4 minute videos on best practices for Waterproofing decks.

Y’all ready for this? Our new 3 to 4 minute video series will focus on best practices building and waterproofing decks over living spaces. I’ll be talking about framing, sloping, sheathing, flashing, drains and much more! Watch for our posts coming soon.

Opinion – The California State License Board (CSLB) Has a License Classification Problem For Deck Waterproofing

Multiple Classifications of Contractors Can Waterproof Decks, But Few Have to Pass a Written Proficiency Test

D-12 Synthetic Products Classification Doesn’t Require a Proficiency Test

Manufacturer’s Accept D-12 License’s to Become Authorized Applicators

If you want to be a general contractor, plumber, electrician, earth mover, well driller, roofer.. CSLB requires you to have 3 years certifiable experience in that trade, plus take a legal exam on CSLB and state contracting laws AND pass a 3 hour test on your proficiency in that trade. You have to prove you know what your doing before they give you a license to do it. There’s a risk to consumers from people who don’t know what their doing. CSLB goes out of their way to run sting operations on unlicensed contractors, running press releases and posting hidden videos of their stings.

However, if you want to be a contractor that installs waterproofing for foundation walls and decks, decks like say the balcony in Berkeley, you don’t need a license that has a test that proves you have some knowledge; you can obtain a D-12 Synthetic Products license like this author has. A D-12 Synthetic products contractor does not have to pass a written test of proficiency in the subject of waterproofing! You just need to apply for it if your licensed in another trade and add it to your classifications and start waterproofing decks and foundations as most of the deck manufacturer’s accept the D-12 classification to sell and install their products.

How do I know this? Because I have/had a D12 license classification with which I used it to waterproof decks and balconies. But I’m not the only one, there are many contractors out there waterproofing decks using a D12, as well as using a C8 (concrete) or a C33 painting license improperly apparently, and CSLB seems to have a lassez faire attitude about this issue.

Will CSLB change the licensing requirements for becoming a deck waterproofing contractor?

Continue reading Opinion – The California State License Board (CSLB) Has a License Classification Problem For Deck Waterproofing