sloped concrete roof deck concerns

Sloped Concrete Roofs ICF Builder Magazine

26 Aug 2008 They can support an enormous amount of weight, so concrete roofs can be converted into decks, rooftop gardens, “We used a 3-inch-slump mix on that project—it has a 7: 2 slope—and it stayed in place no problem.

Low-Slope Roof and Deck Design - STRUCTURE magazine

Building offsets are common and create intersecting planes that contribute to drainage issues for low-slope Ponding water is commonly observed at valley intersections for low-slope roof and deck balcony appli ions. Figure 2 The topping surface is typically a lightweight concrete product installed in a semi-fluid state.

A system for building sloped concrete roofs - Concrete Construction

Concrete Roofing System Inc., was selected to reflect their concerns with homeowner safety and envi- ronmental issues such as resource and energy conservation. Roof construction. The sloping roofs are suitable for homes having masonry or

How can a slightly sloped concrete roof be treated to permanently

One property owner I knew used parking lot paint* on concrete decks that were roofs to the floor below. It held up well, provided slip resistance, was easy to reapply, and there were no leakage issues that I knew of. *This

It All Starts with the Roof Deck - Buildings

2 Oct 20 0 Not only that, but roughly two-thirds of all low-slope roofing activity involves replacement or renovation. FIG 2 ; Composite decks of lightweight insulating concrete on corrugated steel or form boards see FIG 3 ; Thermoset, compacted asphalt fills If the existing roofing is to be removed down to the deck, and tapered insulation or a sloped fill is planned to solve ponding problems, will

Steep-Slope Roof System USG

With USG Structural Panel Concrete Roof Deck Steep-Slope roofs can be achieved with ease. Strong, durable concrete panel; great uplift ratings; Dimensionally stable; panel will not buckle or warp like wood sheathing; no moisture issues like

Wet Concrete Roof Decks Spawn a Rise in Litigation in 20 7

2 May 20 7 Lightweight Structural Concrete Creates a Slippery Slope for Businesses and Legal Experts. It is no secret: concrete does not exist without water. However, construction companies specifying concrete as a roof deck surface are banking on the fact that all the It is important to find the root cause of the water damage not only to fix the problem, but also to find out who may be culpable.

Concrete Deck Moisture Issues: Causes and Preventative - IIBEC

approaches in situations where problems have occurred. INTRODuC TION. The low-slope commercial roofing indus try is increasingly faced with moisture-related claims over concrete decks. roof assem blies over concrete decks are typically

Avoiding Condensation in Low-Sloped Roofing Assemblies

a problem in steep-sloped roofs with an attic, since they typically have ventilated attic spaces. Proper Low-slope roofing assemblies are comprised of the roof deck, Figure : Vapor Barrier Placement on a Lightweight Structural Concrete.

Flat Roof Advantages and Disadvantages Lifetime Roofing

While flat roofs are not the most glamorous option, they have advantages. Knowing the Top floor apartments and finished attics are possibilities without the sloped walls produced by traditional pitched roofs. In homes There are flat roof companies that feel that insulation and snow weight problems are misconceptions.

New Lightweight Concrete Technology - Roofing Contractor Magazine

6 Mar 2007 The use of lightweight concrete as a roof decking and insulation system has expanded in the past five years. When provided with insulation, a thermal R-value of R-30 can be easily achieved without insulation delamination, warping or attachment concerns. The thickness and density of the lightweight pour depends on slope factors and height requirements at existing penetrations,

Flat roof - Wikipedia

A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat Roof decking is usually of plywood, chipboard or oriented strand board OSB, also known as Sterling board of around 8 mm thickness, One problem with maintaining flat roofs is that if water does penetrate the barrier covering be it traditional or a modern membrane , On some membranes, even stone or concrete paving can be fitted.

Steep-slope reroofing considerations Professional Roofing magazine

Aug 2004 NRCA defines steep-slope roofs as those designed for installation on slopes greater than 3-in- 2 4 degrees . Other decks that may be encountered are gypsum poured or precast , cementitious wood fiber, nailable concrete plank and Examine the underside of a roof deck for stains, rust, mold and degradation, which generally indi e there is or has been some problem, such as

Flat and Low-Slope Roof Moisture Warnings, Prevention and Cures

Flat and low-slope roof designs to avoid moisture and condensation problems Flat roofs call up a whole new breed of wood, corrugated steel, or poured concrete , and the roof membrane is secured through the insulation to the roof deck itself.

Roofing - City of Vancouver

problems. reduce ecological impact. By choosing a long-lasting quality roof, you& 39;ll delay its replacement. If you select Low Slope Roofs. Considerations and choices for this roof style. Green Roofs. Want to be truly green? Plant a garden on your roof Roof Decks. If you& 39;ve got the right roof, put it to work as an aerie. Resources. Where to get more information to create Professional installation is especially important with concrete tile; choose roofers with demonstrated experience.

Snow Load Safety Guide - FEMA

the underlying issues or forensics of snow-induced structural failure. The Roof slope. □ Roof shape. □ Roof obstructions. □ Thermal condition of the building. Before acceptance of the IBC as a national code, Concrete construction can vary widely. Overstressed roof deck or framing typically displays some warning.

Tapered Roofing Systems EPS Industry Alliance

Exterior Insulating and Finishing Systems · Insulating Concrete Forms · Structural Insulated Panels · Floors, Walls and Ceilings · Below Positive sloped roof systems result in reduced maintenance and less stress to the building structure. In this case, the roofing support columns are varied in height so the final roof deck has high and low points from which to place the roof drains. A designer must take into consideration the details of the roofing area as well as budgetary concerns.

Flat roof defects - Designing Buildings Wiki

29 Sep 2020 Introduction; 2 Concrete slab flat roofs; 3 Timber flat roofs; 4 Flat roof coverings. 4. Asphalt; 4.2 They were seen as a cheaper alternative to traditional pitched roofs, but whilst their capital cost can be lower, they can be prone to defects. The majority of flat roof problems relate to moisture, either from rainwater or condensation. In nearly Timber flat roof construction usually consists of structural joists topped with a decking of plywood or a similar sheet material.

Is a Flat Roof Better than a Sloped Roof? Angie& 39;s List

8 Nov 20 Concrete Repair · Doors · Driveways · Exterior Painting · Garage Doors · Gutter Cleaning · Gutter Repair · Home Builders · Masonry Flat roofs offer energy savings but often don& 39;t last as long as sloped roofs. You and your contractor may decide to construct a deck over a rooftop room to prevent damage. However to combat this issue the NRCA recommends frequent inspections of flat roofs, because early detection of problems can extend the lifespan of the roof.

specifi ions manual - Malarkey Roofing Products

OF LOW SLOPE ROOFS. 0. .4.2 LOW SLOPE MEMBRANE ROOF DECKS. . .5. PLYWOOD/OSB ORIENTED STRAND BOARD . .5.2 WOOD BOARD DECKS. 2 Roofing problems over concrete decks due to lack of structural

Low Slope Roofing Systems - Engineering Professional Development

Learn the best solutions to your roofing problems, whether you& 39;re working on new construction, re-roofing projects, or performing Roof deck design; Steel deck profiles; Lightweight concrete; Wind load calculations; ASCE 7 and FM Global.

Flat Roof Systems in Cincinnati and Northern - Deer Park Roofing

Advice for Cincinnati and Northern Kentucky flat roof replacement, including roof slope, roof drainage, r-value, wind uplift, tear off vs roof-over. If the existing roof system s are being removed down to the decking you will most likely have the best opportunity to address the structural issues. Excess water in a concrete roof deck can cause stress cracks when the deck is exposed to freezing and thawing.

Download Flat Roof Design Guide - Nuralite

through to the Nuraply 3PM roof membrane and Nurajacks supporting our floating deck, we received a bulletproof, one-stop solution enabling us But in the real-world, problems in waterproofing membranes arise with both inappropriate product selection and/or inadequate slope with a screed. Wait for concrete and screed to cure. Confirm substrate is sound. Nuralite to assist with tapered board layout.

Tapered Roofing Insulation-Add pitch or slope to a roof-get water off

Best Value for Tapered Roof Insulation that you can field design. PlymouthFoam tapered EPS insulation can help eliminate ponding water issues and even correct poor structural taper design. could cause deck to deflect in certain areas

What You Need To Know About Re-roofing Low-sloped Roofs

2 May 20 9 As a homeowner, you need to be concerned about not delaying roof replacement and risking leaks and expensive Considerations for re-roofing a steep-pitched roof were addressed in a previous blog article. is a risk of water being diverted underneath the rolled roofing, which could lead to damage to the roof deck and a roof leak. Roofing cement should also be used at the seams.

HVHZ Chapter 5 - Florida Building Code

Aesthetic issues not affecting the performance of the roof are not part of this chapter. Discontinuous roofing systems include asphalt shingles; concrete, clay or metal tile; wood shingles or shakes; and Any Class A, Class B or Class C roofing system applied to the appropriate deck type within the specified slope of the

PONDING ON A FLAT OR LOW-SLOPE ROOF - Fania Roofing

4 Jun 20 8 Does your building& 39;s flat or low-slope commercial roof have sufficient drainage to prevent water ponding? short-term ponding on a roof does not usually create problems, but standing water for over 48 hours can threaten the roof membrane If a building& 39;s roof substrate or roof deck does not meet the ¼: 2 required slope, your commercial roofer will install a We use materials such as lightweight insulating concrete, thermosetting insulating fill or spray polyurethane

Tapered Insulation For Low Slope Roofing

9 Dec 20 5 However, tapered lightweight insulating concrete should be evaluated as an alternate to tapered insulation as Various degrees of slope may be needed to address or overcome deflected areas in the existing roof deck or However, average R-value is usually used due to the physical constraints of slope, fastener length, and flashing height, as well as the general concern for budgets.

Limiting moisture ingress into low slope roofing systems - AIA

2 Sep 20 7 The executive director of building and roofing science for AIA partner GAF offers advice to design your project with moisture in mind. How concerned are you about future moisture ingress into the system? You& 39;ve Installation of a vapor retarder, on the top surface of the concrete deck, is strongly advised.

Proper roof slope and drainage are important to prevent excessive

2 Jul 20 2 short durations is unavoidable and considered acceptable by NRCA and membrane roof system and method of slope for drainage, and the roof deck Lightweight insulating concrete, thermo- Post-installation issues.

The best way to change a pitched roof to a flat roof? - Warner Roofing

9 Mar 2020 When converting your pitched roof to a flat roof take these items into consideration to make the process as easy and enjoyable as Although not as popular as a sloped roof structure, flat roofs offer a certain aesthetic that some homeowners adore. If not, you could be facing major issues down the road.

ultraply tpo roofing systems - Firestone Building Products

Dec 2020 Table .06- 5 Acceptable Fasteners for Lightweight Insulating Concrete Roof Decks Roofs that exceed the maximum slope and height limits for the roof system assembly, see table. .0 - interior humidity is of concern.

New Roof Assemblies - Kemper System

Kemper System membranes can be installed on any new roof with direct appli ion to plywood, concrete and metal. In addition Kemper System ís odor- and solvent-free products eliminate environmental issues with building occupants. Kemper System membranes also are unaffected by ponding water and ice conditions, ideal for dead level decks. An additional requirement was to provide positive slope to eliminate an extensive ponding water condition that had become a

chapter 7. - NHBC Standards 2020

Concrete decks. 04. 7. .7. T hermal insulation and vapour control. 05. 7. .8. Waterproofing and surface treatments. 05. 7. .9. Green and Where joists and concrete roof elements are used to provide lateral restraint, they should: ▫ have a Issues to be taken into account include: a falls b outlets. The principles for drainage given in Chapter 7.2 & 39;Pitched roofs& 39; are applicable to flat roofs and balconies.

Top 5 Roof Types, Plus Their Pros and Cons – Read Before You Build

6 days ago Also known as pitched or peaked roof, gable roofs are some of the most popular roofs in the US. Suggested materials: Gabled roofs can be covered with almost any type of material including asphalt shingles, metal, and clay or concrete tiles. Note: Proper construction and maintenance is a must to prevent minor issues from turning into major problems. of insulation from within the house, throughout the entire house& 39;s walls including the roof deck/ceiling portion

Types of Roof Membranes for Flat or Low-Slope Roofs - archtoolbox

6 May 2020 FM Global provides roofing design guidelines in their Roof Deck Securement and Above-Deck Roof Components Below the main roofing layers are the substructure wood, concrete, or metal , insulation, plywood, underlays, vapor barriers, etc. An advantage of modified bituminous roofs over BUR is the simplified installation process, which is less prone to problems — although the

The Roof Deck and Tearing Off or Roofing Over4 - American Shingles

Roof deck performance can have a strong affect on shingle perfor- mance. A bad the compli ions that a problem deck creates can usually be traced back to the WB decking applied with the long dimension aligned vertically up the slope. LIGHTWEIGHT CONCRETE: This is composed of portland cement and either

roofing project manual and specifi ions dated - Portals

concerned. Materials and workmanship required by such regulations shall be provided by the. Contractor whether or not specifically noted herein or shown on the dings. 2. Bidders are E Maintain a construction crewmember as a Floor Area Guard whenever roof decking is being repaired or replaced. concrete ramp sloped on three sides from street pavement to top of curb across the width of the.

6 Steep-Slope Roofing Material Options - Exterior Pro Roofing

8 Feb 20 5 The six classifi ions of steep-slope roof membranes to help as you discuss your options with your roofing contractor. Concrete Tiles: Made of portland cement, sand and water, concrete tiles are mixed and extruded under high pressure into molds. Solid roof sheathing or decking is required for this roofing system. 238 T Standing Seam Solves Common Metal Roof Leak Problems · Best Sealant For Metal Roof Leak · Metal Roof Coatings Vs Metal Roof overlays

Mastering Roof Inspections: Roof Styles - InterNACHI

The purpose of the series “Mastering Roof Inspections” is to teach home inspectors, as well as insurance and roofing professionals, how to asphalt composition shingles;; wood shakes and shingles;; metal roofing;; clay and concrete tile; and; slate. The term “roofing materials” includes everything attached to the roof deck Since this series focuses on steep-slope roofs, we won& 39;t be talking much about flat roofs. The inspection concern is the roof framing supporting the cupola.

Waterproofing of New Roofs and Terraces - Dr Fixit Institute

pitched roof. The disadvantages of flat roofs are: They cannot cover large column-free areas. Leakage problem may over the waterproofed deck on concrete pads. A typical figure of pSeven Trust penetration through roof slab is given in Figure .

Roofing research: a bibliography - OSTI.gov

research — materials, construction, and in-service problems. Structural There is no one established journal in which roofing research is reported. Much of the by Venting and Deck Slope. Perlite Concrete Used in Built-up Roof Decks.

Common Roofing Terms You Should Know Roofing Glossary

A voluntary organization concerned with the development of standards, testing procedures, and specifi ions. Many city building codes use ASTM standards. Base Flashing – the portion of the flashing which is attached to, or rest on the roof deck. Built-Up Roofing – a flat or low sloped roof made up of layers of asphalt and ply sheets. AKA BUR . Butt – the Mastic – see asphalt roof cement. Modified

Construction Concerns: Roof Coverings: Pitched Roofs - Fire

25 Mar 20 3 Building Construction Concerns for Firefighters: Roof Coverings: Pitched Roofs. . Building Tile roofs photo 2 are made of overlapping and interlocking terra cotta or concrete tiles, which are not combustible. Tile roofs

Below Deck Insulation and Cool Roofs — What& 39;s To Go Wrong

20 Jun 20 7 For most of us in the low slope roofing industry, it& 39;s considered to be absolutely standard to have insulation placed So, Cold Roof Decks Have Always Been a Problem? No Historically, membranes were not “cool” but