0000085908 00000 n Roof decking is typically 7/16” and comes in 4’x8’ sheets. The roof deck is the section of the roof where everything else is placed. Sure, it can support foot traffic and the occasional snow load that will become an inevitability with any roof out there. Roof deck rib openings are usually narrower than floor deck rib openings. The substrate to which the Firestone roof system is installed must: Be structurally sound Be dry, smooth, flat and clean Be free of sharp fins, or foreign materials that could damage the membrane Meet the minimum requirements for the system 3. 905.1 Roof covering application.Roof coverings shall be applied in accordance with the applicable provisions of this section and the manufacturer's installation instructions. Our lightweight steel deck profiles have depths that range from 13⁄ 8” to 71⁄ 2”. The roof deck must be strong to: Support the roofing materials and workers. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures. nailed to the trusses or rafters. 0000016536 00000 n 0000096529 00000 n 0000052556 00000 n 0000003675 00000 n Roof replacements shall comply with Section C402.1.3, C402.1.4, C402.1.5 or C407 where the existing roof assembly is part of the building thermal envelope and contains insulation entirely above the roof deck. For buildings constructed in accordance with the IBC, the requirements are fairly complex and depend on the type of construction, use group, and rating of the wall, as well as fire separation distance between buildings and the construction of the roof assembly. Where the roof profile allows a space between the roof covering and roof decking, the spaces shall be constructed to prevent the intrusionof flames and embers, be fire-stopped with approved materials or have one layer of minimum 72 pound mineral-surfaced non-perforated cap sheet complying with ASTM D 3909 installed over the combustible decking. Generally speaking, this is a highly durable and stout kind of roof decking. %PDF-1.4 %���� Having a proper roof deck is the foundation of any good roofing system. 0000040476 00000 n Among them are the following reasons: The decking of your roof plays an important part in supporting the overlaying material. Much like the foundation of your building, the roof decking is the basis on which the rest of the roof operates. If roof decking is spaced more than ½” between boards, new roof sheathing will also be required. Again, if this type of decking is discovered during the tear off of the roof shingles, a thorough inspection must be made to make sure that it is in good overall condition and that the gaps between the individual boards does not exceed ¼” to ½”. In short, the roof deck is the roofing material that lays between the structural components of a roof (the joists and trusses), the insulation, and the waterproofing layers (coatings, roofing materials, layers, etc). 5. Roof deck acts alone in transferring horizontal and vertical loads into the building frame. 0000030773 00000 n Roof Deck Sheathing: Roof deck shall be minimum 7/16” OSB (15/32” Plywood). When it comes to plywood or OSB sheathing, you may have seen it before under the false term of Wafer Board. Roof decks are subject to many additional code requirements that vary by jurisdiction. %%EOF If you have any questions, leave your info below and we'll call you. X�����I� IX��D�$�0e00l`�i|�`��dʠ��p� � �Lf�JX�T3;0Lc`���y H��V�NI}���Gx�vW�[�"q1�]c�Q,/v�$,����S�3��B®:U�������j��>|���?�T�[�mP�$���ԗə��W��Tc��iR7��Q7����(Y�t�\7�Ӎn�I��QE�b��Y[E�t6��M�no~�C��q��e��z�Ґ��&E"�k�霽+K�'U(E�31�������:|l�k���@��� )��7Y����^A�|�k�;�@+���{�m��n���G��n���C{�ܭx��y�{�I��Aw�x�Q�(�_]I(�cBo�S�}��MN����n�W3�ތo_�7Ķ����E�1z-�$���|>�f�w�uo�M�n��2*����Je��V�^��������bz~9���N�R�]�wf�G�l�q3���«��&0d���yg�Xv��tQ;{��ޮ�H��nv�P(ko�����3��d�8�O��_�߶��o��~��n�����i����Z��(�M��߁wmCp���MSvij�W�M�*����m@�#8�=��:O��Ȑ�5�(!�v��u���Ba$�k�b�α�M:���`^�J��N�e��Ѩ�d��ĵD�\oj1����`�@��;��jW. The requirement became effective on October 1, 2007. Wood shingles tend to be expensive when it comes time to tear down and replace them, so using re-sheathing over the entire roof is a far cheaper method. This provides adequate sup-port of rigid thermal insulation board. Safely resist impact loads, such as a pile of shingles. <<55569C2A33E9514291D839806BE9EB9F>]/Prev 1206510/XRefStm 1624>> 0000010356 00000 n Because of this, it needs to be strong enough to hold weight and be durable enough to cope with having some give. There should also be a sufficient number of fasteners to prevent any kind of buckling and each board should be fastened with at least two nails in each rafter to ensure that it is held securely but without too much force. 0000096490 00000 n There are a number of reasons that property owners should be interested in the type of deck that is on the building and the condition that it is in. All the wood boards used have to be properly conditioned to be at a moisture equilibrium. 0000014366 00000 n The building code requires (in Section R502.2.2.4 of the 2009 IRC) that "Wood/plastic composite deck boards shall be installed in accordance with the manufacturer's instructions." Shall be nailed 4” o.c. When a number of those adjacent boards join on the same support or rafter, it can be possible for the deck to move due to all that distortion to a crack line in the singles. The type of material used depends on just how much weight that it needs to carry. 0000023297 00000 n Where exterior plaster or adhered masonry veneer is provided on the vertical sidewall, the base flashing shall be provided in accordance with this section and Section R703.6.3. Fasteners shall be minimum 8d common (0.131 x 2.5”). Residential buildings will likely use wood for the roof decking because it stands up to the weight of just about anything that will be placed on top of it. Take into account any additional snow weight if your area sees heavy snowfall so that your deck does not bow and crack under additional pressure. There are a number of reasons that property owners should be interested in the type of deck that is on the building and the condition that it is in. The Asphalt Roofing Manufacturers Association (ARMA) recommends that the structural roof deck meet certain minimum requirements to be an acceptable substrate for the specified roofing system. Roof deck is typically installed to endlap approximately 2” over supports. Most … 0000001800 00000 n If you’re tearing off old roofing, the roofer can look for damage that needs to be repaired once the deck is bare. 0000105644 00000 n There are other factors involved including the weight of any air conditioning equipment, rainfall in the area, and any potential build up of snow. The most common roof covering for residential structures in Texas is asphalt shingles. "Somebody gets a bright idea: Why not put a deck up there? 0000060076 00000 n PLANK DECKING – In older homes, plank decking may have been used for the roof decking (substrate). 114 0 obj <> endobj Special features, something like walking decks or rooftop swimming pools or bars may also be needed for extra support. C503.3.1 Roof replacement. 0000006252 00000 n h�b``�g``�b``�[ǀ Panel lengths range from 5 feet to 45 feet. The owner may wish to maintain the architectural appearance; therefore, roofing nail penetrations of the underside of the decking may not be acceptable. REQUIREMENTS FOR ROOF COVERINGS. If it was originally secured using staples or 6D nails, it must be completely re-nailed to the new standard. 0000016422 00000 n What is Roof Decking? xref Hello! Make sure to install the boards using staggered vertical joints and make certain they are parallel to the ridge line. bearing elements include any column, girder, beam, joist, truss, rafter, wall, floor or roof decking that supports any vertical load in addition to its own weight or any lateral load. The most common rafter spacing is 24 inches, and 5/8-inch plywood is recommended for that. 7 | P a g e If that brittleness occurs, it can really compromise the structural integrity of your roof as a whole and you will have to have very costly repairs or replacements done immediately to prevent any safety hazards. R905.2.8.4 Other flashing. By Jim Cory. 2. h�bbbd`b``Ń3��'` )�� Plank sheathing, meanwhile, is typically something that was used before plywood. There are a few points that you should definitely be aware of during the installation process. Make certain to properly ventilate your attic in order to eliminate any excess moisture that can be absorbed by deck panels. Roof deck deflection should never exceed 1⁄240 of the span under total … You can then focus on implementing the roofing materials that you need to get the right roof for you. 0000006799 00000 n Builders began using this method because it has strength and longevity against splitting. It is also important to stagger your joint boards. Allowable uniform load based on deflection of 1 / 360 of span is 100 pounds per square foot except the span rating of 48 inches on center is based on a total load of 65 pounds per square foot. A proper roof decking will meet design requirements like component anchorage technique, deflection resistance, fire resistance, surface characteristics, and dimensional stability. Generally speaking, you roof deck is meant to hold the fasteners to secure the roof. Exposed, open beam ceilings are where the underside of the roof decking can be viewed from below. Those plywood panels should be installed with 3 mm spacing between each panel unless it has been stated differently by the manufacturer. trailer Be sure to take a long look when going over your tongue and groove roof decking. existing roof decking must comply with section 507.2.2 of the Florida Existing Building Code or be re-nailed utilizing fasteners on a specified spacing (again as defined by the new regulations). Understanding the different kinds can give you a good idea of what to expect out of each. Plank sheathing is generally susceptible to distortion thanks to weather changing. Tongue and groove decking is usually done with a 2×6 “tongue” formed on one edge of the board. Save yourself a lot of time and labor by making certain that your roof decking is installed properly and rated to handle the weight that will be on your roof. Although you can’t see it, roof decking is … 0000052813 00000 n 0000009887 00000 n The roof deck should be a stable, smooth and solid surface where shingles can be easily and, more important, securely installed. Roof decking is the foundation of your roofing system that connects the roof to your house. But do it carelessly, and you've got potential liability problems. The type of roof decking varies based on whether you have a commercial or residential need. 0000074742 00000 n Several of the changes apply to both new construction and roof replacement. 0000040966 00000 n This is meant to fit snugly into the “groove” in the board that is adjacent to it. 0000005069 00000 n Please refer to the manufactures specifications on roof decking requirements for manufactures warrantee. 0 Typically, plank decking material is either 1”x6” or 1”x8” lumber. 0000023916 00000 n Whether this applies in your case depends on whether your deck boards came with manufacturer's instructions. 0000068767 00000 n 0000075000 00000 n 0000015602 00000 n [Click any table or … All roof deck surfaces, regardless of type, should be clean, dry, and free of debris, protrusions, dust and oil prior to the installation of underlayment or asphalt shingles. 0000016648 00000 n The only time that it will need to be repaired is when it has had any extensive exposure to moisture. Roof deck is not designed to act compositely with other materi-als. 6. 0000001956 00000 n 0000003725 00000 n It will support roof loads for most situations and is … 0000003086 00000 n 0000007403 00000 n (Definition + Tips), California City Selects Conklin For Energy Rebates and Savings, Case Study About Longevity of Foam & Coatings. 0000075365 00000 n 0000013248 00000 n Random Length Continuous L 2' BEAM SUPPORT = wL4 130El Fb = wL2 6.67S L BEAM SUPPORT = wL4 El 5 384 Fb = wL2 8S L BEAM SUPPORT = wL4 … Many changes strengthen the code to improve the resistance wind and water infiltration damage. Generally speaking, there are three different types of roof decking to keep in mind: tongue and groove, plywood or OSB sheathing, and plank sheathing. ROOF ASSEMBLIES Section R703.7.2.2. 2. 0000003328 00000 n 0000030345 00000 n North Carolina remodeler David Tyson sees them all the time down at beachfront properties on the coast. 0000011527 00000 n ROOF DECKING INSTALLATION INSTRUCTIONS ... structural wood requirements, residential or commercial. 0000008670 00000 n 7. 0000060711 00000 n edges and 6” o.c. q Commercial Property Number of Squares_____Color_____Number of Buildings_____ Date of Installation_____ Cost of Installation_____ To be eligible for the Golden Pledge® Ltd. Warranty, you MUST fulfill these requirements: 1. Building Codes for roofing reqiure a minimum 1x4, and the spaces between battens should not exceed 3 1/2 inches ( Figure 2-46 - wood shingles over spaced sheathing, and Figure 2-47 wood shakes installed over wood sheathing are illustrated below). * Type of Structure: q Single-family, detached residence q Multi-family q HOA/Condo Assoc. 0000000016 00000 n From traditional to contemporary styling, the magnificence of Western softwood is the foundation on which architectural dreams are based. Generally, all decks should be clean, dry, and securely fastened to the building structure with no abrupt level changes exceeding 1/8”. This reduces the amount of shrinking and swelling that the wood experiences, helping it last for longer without turning brittle and breaking. 0000085947 00000 n This can include anything from wood to cement, concrete to steel. The manufacturer should indicate compliance with these requirements on … These methods became more and more popular in the early 1980s and 1990s and is now almost exclusively used by builders across the industry. It is also important to ensure that you have sufficient support with an absolute maximum of 600 mm between the two rafters. endstream endobj 163 0 obj <>/Filter/FlateDecode/Index[6 108]/Length 26/Size 114/Type/XRef/W[1 1 1]>>stream The material itself is certainly important for keeping the elements away and holding up to the constant wear and tear that comes with exposure to the elements, but it doesn’t do its job with the proper roof decking. P��W���M� ��0H;0Y3���`��4�����6�� … The IBC and IRC have specific requirements for roof construction where certain types of fire-resistance-rated walls that terminate at the underside of the roof decking. Owens Corning® asphalt shingles should never be installed directly over insulation board of any type. Requirements for decking a roof Decks over living space seem like a homey idea. Fasteners; roofing nails that extend through the underside of the roof sheathing, or a minimum of ¾” into the roof decking. 0000012930 00000 n 164 0 obj <>stream It’s the base that lays on top of the structural trusses—the “bones” of your attic—to cover the rafters and support the weight of the roofing shingles. The deck is meant to resist gravity loads as well as lateral loading from things like the wind and other seismic forces. The vertical joints that are between the boards have to be supported along the whole length and need to be nailed securely. If you are using asphalt shingles on your roof, select shingles tested to meet the ASTM D 3161 Class F or ASTM D 7158 Class H requirements. startxref The roof sheathing (plywood or OSB) has to be be nailed with 8D (eight penny) ring-shank round head nails at six inches on center. This can result in constant expansion and contraction that can wear down those planks over time, making them brittle with enough expansion and contraction. 0000001624 00000 n Roof repairs (not an entire roof replacement) does not require re-nailing of the entire roof deck however you would be required to re-nail any decking that is to be exposed and does not meet current requirements!! Regardless of what style of roof decking that you choose, you need to make certain that it is installed properly so that you get the proper weight support that your roof needs. 0000053423 00000 n 0000009492 00000 n Roofing Materials: Deck Re‐nailing FBC – Existing Building Section 706.7 establishes the requirement that the roof decking is 0000040221 00000 n in field designed and/ or tested to resist (for gable ends, the gable rafter and fly barg shall be considered an edge). 0000068507 00000 n But with no thought to loads, weight, or waterproofing." If that wood is compromised, it might not be able to provide the level of holding power that will allow the roof to last its suggested lifespan. How Much Weight Can a Concrete Roof Support. The owner provides the option of maintaining this appearance. 0000030088 00000 n 114 51 Roof deck prep and repair . 0000069206 00000 n This can be something of a challenge to replace as it is something that is not readily available in most lumber yards. There are a wide variety of materials that can be used for roof decking. Without a proper roof decking, your roof will eventually buckle under the pressure and need to be replaced. Roof Warranty In America” Featuring the gaF LiFetime rooFing SyStem! 0000060337 00000 n Allowable load at maximum span. 0000023565 00000 n several key changes to the requirements for roof assemblies. endstream endobj 115 0 obj <>/Metadata 4 0 R/Pages 3 0 R/StructTreeRoot 6 0 R/Type/Catalog/ViewerPreferences<>>> endobj 116 0 obj >/PageWidthList<0 612.0>>>>>>/Resources<>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/Properties<>/XObject<>>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 117 0 obj <> endobj 118 0 obj <> endobj 119 0 obj [/Indexed/DeviceRGB 255 133 0 R] endobj 120 0 obj <>stream A proper roof decking will meet design requirements like component anchorage technique, deflection resistance, fire resistance, surface characteristics, and dimensional stability. The roof decking is the layer of plywood or O.S.B. �����v2Mh ������]�� �c``�eeʰ�20l0 ̢(& 0000001342 00000 n Residential Co.