Tag Archives: deck design

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

Thinking About A New Deck? Consider the Benefits Waterproof Walking Decks Offer

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As winter starts heading into spring you may have looked out at your deck and heaved a sigh knowing you have a choice to make this year…replacing that old rickety wood deck or the fading, sagging composite deck that was supposed to last 30 years. What to do what to do? Go back to a wood deck using exotic Ipe and hope that lasts longer and has less maintenance? Use the newest and “greatest” composite?

While the wood and composite markets currently dominate the deck market, the end user is getting tired of the limited color choices of composite decking available at lumber stores and doesn’t want to wait for a special order with it’s various requirements and doesn’t really like the thought of the maintenance that wood decks require. The newest choice available is actually a choice that’s been around for a long time, it’s just that not many knew about this choice til now.

The new “choice” for decking is rapidly becoming solid surface walking deck systems installed over a plywood substrate on conventional doug fir or pressure treated framing. Solid surface decking systems offer many advantages over it’s wood and composite competitors. Some of those advantages are

  1. Waterproof! These decks can waterproof and give you a walkable surface on a roof deck, dry in a patio below, keep a storage area dry underneath. Increases your homes value!
  2. Cost competitive. Framing costs are the same as for decks receiving wood/composite decking. Plywood and the waterproof coating system often costs less than composite decking and almost always less than exotic hardwoods.
  3. Less Maintenance! No sanding, staining and sealing every year. Most waterproof deck systems require resealing every 3-5 years. Clean them off easily using Simple Green, water and a hose and brush.
  4. Unique Looks! Waterproof decks can look like anything you want-wood (yep), tile, stone, brick, stained, stamped…the designs are virtually unlimited!

Look at our deck finishes, you’ll see some of the many various finishes available that can set you apart from the rest of the pack.

Looking for a manufacturer? Find one here