plywood deck coatings minimum slope pitch

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 roofs have up to ... The felt paper is in turn covered with a flood coat of bitumen (asphalt or tar) and then gravel to ... Roof decking is usually of plywood, chipboard or OSB boards (OSB ...

Asphalt-Applied and Cold Application Built-Up ... - Johns Manville

However, the use of coal tar pitch is not eligible for use within JM ... concrete require coating with JM Concrete Primer prior to the application of hot ... G All roofing ply felts should be well set into the hot asphalt utilizing a squeegee or ...... a minimum of ?” per foot (20 mm/m) slope be obtained on the finished roof membrane.

Minimum Design Guidelines

Minimum Design Guidelines for Roofing and Waterproofing Systems ... Materials and Use on Low-Slope Ballasted or Fully-Adhered Single-Ply Roof Systems ..... of pitch pockets or other roof system penetration terminations shall be avoided ...

The Rundown on Low-Slope Roofing - Buildings

Roof assemblies with a pitch (slope) of less than 3:12 are considered .... 3-, 4-, or 5-ply layer membrane over which a coating, surfacing (gravel), or cap sheet is ...

Low Slope Roofs - Metal Roofing Industry

Low slope structural roofing, generally used on roof pitches ranging from ?:12 to ... is attached to the existing flat roof surface to provide a minimum ?:12 roof pitch. ... foot per year, far less than their expectations for built-up and single-ply roofs, ... With heat deflecting metal coatings, energy costs can be reduced up to 40% or ...

deck - Add slope to existing flat porch/balcony - Home Improvement ...

Second, is to remove the sub-floor too & sister-on pitched or sloped 2x4's or bigger. ... I'd probably opt for a 3/4" plywood (not OSB) with Cement Board on top of Options 1 ... if desired, could be painted with a porch or garage floor paint. ... the slope you want. just make these tapered cuts so that the minimum ...

Flat Roof | Membrane Roofing | Waterproof Membrane | About Us ...

Questions and answers to ensure a successful waterproof membrane roof systems. ... A minimum standard of ply is C-D. ... as 1 in 80, or as an angle, although it is sometimes convenient to describe it in terms of ... For Nuraply 3PM a glaze coating is recommended which will require replacement during the life of the building.

CHAPTER 15 ROOF ASSEMBLIES AND ROOFTOP STRUCTURES ...

Ballasted low-slope (roof slope < 2:12) single-ply roof system coverings installed in ... The minimum roof coverings installed on buildings shall comply with Table 1505.1 based on the ...... Coal-tar pitch used in roofing, ASTM D450; Type I or II.

2015 Roofing Policy - Maryland Department of General Services

1.3 ROOFS ON NEW CONSTRUCTION shall be pitched to drains or gutters, with the roof slope ... STEEP SLOPE ROOFS with a minimum slope of 2-1/2 inches per foot, may be finished ... system or a fiberglass shingle system surfaced with ceramic coated ... (1) If wood deck is less than 3/4" thick, nail base sheet to deck and ...

07500 membrane roofing - Mass.gov

... www.nrca.net. Roof coating Manufacturers Association www.roofcoatings.org ... used if slope is greater than ?” per foot. Cold process B.U.R. or .... Flat roofs with single-ply membranes must have a minimum pitch of 1/8 inch per foot for ...

Building Waterproof Roof Decks - documents.dgs.ca.gov

These roof coverings have been tested for weathering, abrasion-resistance, strength ... Slope. To provide the required 1?4-inch- per-foot slope for drainage, joists can be ripped prior to ... rather than the coating on larger decks ... tle for a minimum of 3?4-inch plywood .... whole deck surface is supposed to be pitched toward.

Design Questions | EPDM Roofing Association

EPDM membrane can be used for low and steep slope roofing, as well as ... What are the available thicknesses and types of EPDM single-ply membrane? ... waterproofing and pond lining applications which somewhat resemble roof top ... and is applied after allowing solvent in the adhesive to flash off (minimum 2 hours).

The D's of Decking - Waterproofing Flat Roof Decks - Duradek

Slope. A proper deck slope of 1/4” in 12 will help reduce ... It is also recommended that the PVC waterproofing ... a rough hewn wood post is required, special.

Single-ply rules the low-slung roof - Chicago Tribune

May 2, 2011 ... Covering low-slope and flat roofs used to be one of stinkiest ... They specify a minimum roof slope for their products, and in the case ... Roll roofing Picture an asphalt-fiberglass shingle with a granular coating, but in a long, 36-inch wide roll. ... per linear foot of roof, though many types require a greater angle.

Chapter 4101:1-15 Roofs - Lawriter - OAC

Ballasted low slope (roof slope < 2:12) single-ply roof system coverings installed in .... shall be placed under minimum nominal 1/2-inch-thick ( 12.7 mm) wood structural panel solid ...... GRADE. EXPOSURE (inches) 4:12 PITCH OR STEEPER.

Estimating Roof Pitch & Determining Suitable Roof Types - DIY Guide

Jan 11, 2017 ... So the pitch of a roof is determined by how many inches the slope rises .... Alternating levels of hot asphalt (tar) and heavy roofing felt finished with a gravel coating can be applied to a flat roof for ... It is also a “built-up” roof but only requires a single ply, making it ... A minimum pitch of 3-in-12 will be required.

Building Waterproof Roof Decks | Professional Deck Builder ...

These roof coverings have been tested for weathering, abrasion-resistance, strength, ... stairs, and roof decks, so I see on a near-daily basis the results of water intrusion into wood ... What kind of slope is designed into the framing? ... Always check the plans before building; decks should be a minimum of 1 1/2 inches below ...

Deck Drainage & Waterproofing: From Sloping to Drains - Pli-Dek

Feb 6, 2017 ... Applying deck coating to eliminate ponding and improve water drainage ... Basically, you need to know two terms: Pitch and slope, which basically describes ... Some deck owners let water drain through gaps in the wood. While this could work in some cases, it's not recommended since it can take too long ...

GacoDeck Kit · Gaco

The GacoDeck Kit can be applied to balconies, boat decks, lanais, plywood decks, ... GacoDeck Top Coat will maintain your GacoDeck waterproofing system by ... The coating system meets the recommended standards for accessible routes ...

Low Slope Roofing: Lessons Learned | JLC Online | Roofing ...

Slope is very important! One-quarter inch per foot is the code minimum, and it's a very good idea. ... Inadequate slope and poor drainage allows water to pond on a flat roof. The result ... Membranes. Instead of metals, we usually work with single-ply membranes. .... Still, pitch pockets are useful where a boot can't be installed.