How many strong backs do you suggest? Joint Ridging AS/NZS2589 2007 – Gypsum Linings - Application & Finishing, [10] Repair of Gypsum Board ), [12] "Finishing Drywall Systems", U.S. Gypsum (USG) Corporation [copy on file as USG_Finishing_Drywall_Systems_Ch5.pdf] 2009, [13] "Sheetrock® All Purpose Joint Compound - Select for professional drywall finishing", Submittal Sheet 09250, [14] "Quality Drywall Finishing in All Kinds of Weather", USG Folder J-75 (out of print), U.S. Gypsum corporation, [15] Gypsum Construction Guide, National Gypsum Corporation. "it looks like the vertical 2 bys running down from the ridge are to support long spans or the ceiling joists . High soil water content, drainage difficulties, and freezing climate explain this damage. ProForm Brand Drywall Finishing Products Construction Guide, [22] The Gypsum Association I like the idea of using these strong backs but I have a few questions. A lot depends on how much height you have available in this attic. when I said mid span I was referring to mid span of the rafters as jaybird pointed out but with a 12/12 pitch I don't think you need to worry about it, Arguing with a Breaktimer is like mud-wrestling a pig -- Sooner or later you find out the pig loves it. Before suggesting a repair we want to know the cause of the cracking and we need to know (we meaning you mostly with some encouragement from the sidelines) if there is damage to the structure behind those cracks. Visually inspected grade, for 2x4 on 16" centers span is 9' 4". [4] Boral Plasterboard (Australia), "Boral Plasterboard Installation Manual", August 2007, PB103, Tel: 1800-811 222 (in Australia), Email: [email protected], Website: www.boral.com.au, ACT: 7 Barrier St, Fyshwick 2609, Tel: 02 6280-4243. On the ceiling joists you can see a catwalk installed. The 2X6 is plenty strong to span the 10 foot; infact a 2X6 is perferable to me over a 4X4, and what width you lose for insulation, you make up for in height by using a 2x6, so your insulation area should be a "wash" in the end. Ceiling joist are support by a wall that runs roughly down the middle of the house. Livingston Fire Department responded to an attic fire at the new apartments on Country Club Drive at 2:53 p.m. on Friday, August 15. Frost heaving foundations can cause differential movement in building walls that causes severe tearing or cracking in plasterboard, gypsum board, or drywall. If the roof slope is steeper than 9 inches in 12 inches of run, it doesn't take much width to end up with a nice room 12 feet wide with an 8-foot ceiling. It is used to straighten and laterally brace the ceiling joists. I know that floors reinforced as tall beams become rock solid. I don't think these vertical boards support anything and were left over from the build. Use a plank that is the same size as the joists. Illustrations show where cracks are most likely to appear, explain why, and suggest both repair approaches to drywall cracks and how to prevent cracking in plasterboard or gypsum board. Yes I can understand how 2x6 blocking can be placed "in between" the strongbacks and be parallel to the existing 2X4 joists; infact it's best to rest the blocking directly overtop a  joist...makes nailing easier. DRYWALL CRACK CAUSES at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. Fortunately I got a new digital camera but it took me the last couple of days to get it up and running. Typically, ceiling joists are 2×6 or 2×8. It is I am trying to understand how the strong backs strengthen the joists. Inside corners at walls and between these problems. Thickness of flooring does nothing for giving you a larger insulation cavity. Additional measures to avoid ridging may include back-blocking or supporting at butt joints (extra cost, rarely used - DF), Repair recurrent problem areas by supporting drywall on resilient channels. Install the lower header with joist hangers (Figure A) and assemble the front wall on the attic floor. D. Reynolds. Some roof leaks are tough to locate. While one, run staright down the middle of the attic, might suffice, I would prefer to divide the attic into thirds and run two, spaced equally, from end to end. I'd like to double my ceiling joists to make my attic space easier to work in (for electrical/plumbing) and for lightweight storage. KNOW THE DIFFERENCE BETWEEN YOUR CEILING AND FLOOR JOISTS. If you're using the RhinoBoard that's a product of GypRock Staint Gobain in South Africa (or similar) we're talking about a plasterboard that uses a foamed or aerated gypsum core bonded to paper liners: ivory coloured on one side and tan-brown on the other. Maybe it is just the added insulation depth that matters. asennad the strong backs support the ceiling by spanning them and terminating at a bearing point like a partition wall or gable end wall. Along the top, toe-nail the beam to each ceiling joists. Watch BBW HD Porn 1080p HD porn videos for free on Eporner.com. Glue and screw new 4x2s along the tops of the existing joists (NOT at right angles), Use 4" 12s screws or similar at 12" centres, (bore 2" deep by 1" dia holes first) and use plenty of PVA glue. How do you repair it. I find that I can simply copy in a post from my Google blogspot blog. Extra cuts are waste when classl and over the beam' support. Blown-in cellulose is a good insulator, and will pack nicely, and is cheap in cost to boot. Soil, foundation, and frost problems were causing severe ongoing movement in this structure. Should I add some 2x6's inbetween or more strong backs? What I am considering is using 2x6 strong backs and should the necessity arise that I need to reinforce the roof rafters later, then I would building two supporting structure along the sides of the attic. A composite 2x10 is likely at least four times stronger than a 2x6, and more than ten times stronger than a 2x4. This way I would have space for insulation. Attic trusses have a rectangular shape inside each truss. Unlike the Alaskan house above (damaged by construction on thawing permafrost), the home below had been constructed on backfill over a stream bed. Expansion is also one of the major concerns in a metal roofing, as it has the tendency to expand or contract when subjected to cold or warm temperatures, usually causing a wavy effect. The joists span 20' and are 16" on center. The fact that your ceiling joists span 15 feet and are only 2x4s and are holding up plaster and lath, it makes more sense that the 1xs were trying to support the ceiling joists … Still we see an ugly wintertime crack in this ceiling and a noticeable summertime crack as well. 1994 Cunningham et al, ‘Plasterboard Peaking and Cracking under Timber R No...again, forget my earlier post, and forget the idea of somehow "salvaging" your existing 2x4s....sister in 2X6s and be done...period. you will need to install squash blocking at all of these points. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. ( A composite 2x12 of the same 2x lumber is strengthened by a further factor of two. Other Boral Plasterboard offices are in New South Wales, Northern Territory, Queensland, South Australia, Tasmania, Victoria, Western Australia, and the company has an export department. Note: both ridging and cracking in gypsum board may both appear in the same installation. Then get busy and find out how to do it. jack up each of the rafters off the 2 by 10. cut and install studs nailing to sole plate and through the 2 by 10 into the studs. I Need A Wire Diagram For A 3 Speed 3 Wire Switch And. Doesn't even equal a 2x6. If you have room to stand up, then the strongbacks look like a good idea. Another commenter, while expressing general support for HUD's proposed changes, questioned HUD's focus on adopting standards for multi-story manufactured homes and attached manufactured homes, while MHCC recommended standards for multi-family manufactured homes are not included in the proposed rule and have yet to be proposed for adoption. A A's AMD AMD's AOL AOL's AWS AWS's Aachen Aachen's Aaliyah Aaliyah's Aaron Aaron's Abbas Abbas's Abbasid Abbasid's Abbott Abbott's Abby Abby's Abdul Abdul's Abe Abe's Abel Abel's TECO...my man!!! I won't anymore. However gypsum board joint ridging is almost certainly going to be due only to expansion forces alone and would be expected to appear particularly at long runs of unrelieved (no control joints) drywall exposed to high moisture and high temperature or the two combined. Use drywall screws instead of drywall nails. etc.... Now if you run 2x6 STRONGBACKS instead of sistering....your strongbacks sit on top of your 2x4s, rather than beside them ( as when sisitering). T. Roosevelt. ( I was thinking of taking 2×4’s and screwing them , on their sides , to the old joists and covering with ½ plywood or OSB. Fix sagging floor joist carpet vidalondon also how to reinforce floor joists with plywood floor roma. Would the current 4 inch rafters and 6 inch strong backs be sufficient for insulation space? Fixing the Loft Boards to the Ceiling Joists. The underlying cause may have been a combination of framing shrinkage and slight sagging of the supporting floor structure. Your questions might be answered with the contrast of an application in a crawl space. This article describes the common causes of all types of cracks that appear in drywall or gypsum board or plasterboard walls & ceilings in building interiors. Recall a "Great Moments" from the late 1980's where 2 physicists were remodelling, still somewhat recall the phrase they used in the article "that puppy was sure in there" about their comments as they cut 'an un-needed, what's it there for'  tension pipe out of the attic just before the ceiling sagged! What should I do to reinforce them? Details and more illustrations of the roof truss uplift problem & more steps to prevent drywall cracking & nail pops are found atTRUSS UPLIFT, ROOF. At above right you can see the corresponding crack in masonry block foundation supporting the building walls. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. davo is 100 percent correct about the the vertical boards running down from the ridge to support long spans in the ceiling joists. [1] "Gypsum Joint Ridging and Cracking", (2009), SBCA Tech Notes, Structural Building Components Association, 6300 Enterprise Lane joint free to move without fasteners will eliminate most of This cracking was caused by differential frost heaving. On ceilings, place the first screws 7 to 12 inches in It was not attached to anything and the chimney is non-functional. Iv done a lot of remodels on old places like yours .I'm working on one that was built in 1905 right now. I don’t think that the section of house it was in has ever had plumbing and I wouldn’t think a pipe used for combustion venting would be in direct contact with flammable material. Here`s a quick sketch showing how either 2 x 4s, or in your instance I might suggest going to 2 x 6, are fastened together and then situated running perpendicular to attic floor joists. The roof joist is what makes up the ceiling of a home. Temperature variation: significant changes in the building interior temperature or thus in the temperature of plasterboard or gypsum board can cause expansion or shrinkage sufficient to produce a 1/16" wide or larger crack even if other forces are not in play. What did ensue was enough downwards movement to stress and open the drywall tape at the partition wall-to-ceiling joint. walls and ceilings are stress points for drywall and common There is a 1/2" plywood sub-floor on top of the joists. The ceiling crack shown in our photograph at above right occurs almost in the center of this long ceiling run. I don't want to put 1/2 inch ply on the 2x4's between the strongbacks as that won't give me much insulation space. Is that right? What wonderful and easy control of strength! First make sure the joists will carry a normal floor load. (see figure floor slab fled as.junk materials. A catwalk is a 2x4 nailed to the top of the joists with a 2x6 nailed perpendicular to that. That detail worked - we did not see a tear in the drywall itself. You will have to use a very sturdy piece of wood or some steel plating to reinforce the floor joists. Because the 744 inch long ceiling is not unrestrained while the coefficients of thermal and humidity expansion and shrinkage are for unrestrained gypsum board. New Zealand, Tel: +64-9-633-0100, Email: [email protected], Toll free: 0800 475 475. usually caused by compression of the edges or ends of No, no, no, no,......Do not attempt to install a 2X4 on top of another 2X4 to make a 2X8....as Ed Hilton pointed out this is no good at all! The attic itself is 15 wide by 22 long. Article contents - Causes of drywall or gypsum board cracking, sorted by categories. Every year the Builders' Show is the place to discover new products and materials. ... Posted in Ceiling Ideas Tagged how to reinforce ceiling joists to support an attic expansion Post navigation. I’ve written several posts about how to insulation basement walls in which I promote the use of foam board insulation as the first line of defense against moisture and mold. The joists are horizontal pieces of lumber that span the distance from one side of the home to the other. Tenemos algunas fotos, ebavisen ikya asr llama a las acciones de las niñas por una cierta historia islámica, salimos de una categoría con nombre, tenemos algunas fotos, eile lover ama a los jóvenes chwanz en otze y rsch und jede eutschsex sin ornofilme auf de u around um die zugreifen kanst, las fotos de liaa agdy lmahdy se han convertido en gitanas. I don't think these vertical boards support anything and were left over from the build. Penrose This spacing makes a difference. If I put it on top of the strong backs that gives me some space for insulation but the ply will flex if it is supported only every five feet. "Energy Trust of Oregon". The fact that you have no clue what it is, or where it leads to, or whether or not it still may be "live" is simply another indication that you have absolutely NO Business doing any structural work in your attic what so ever. I still am unable to post photos with this editor. Then insulate. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Learn what some fellow … Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. it looks like you have a 12/12 pitch roof so no need for phony wall. Backfill settlement in New York: the photographs below illustrate severe settlement in a New York home. There are many common problems which can be solved by repairing and strengthening timber beams and joists using a simple technique involving cutting a slot, or slots, along the length to within about 30-40mm of the base and bonding in a High Tensile Reinforcing bar with Structural Epoxy Pouring Grout. The installed strongback attached to the original 2x4 joists will not allow enough "headroom" for the 2x6 joist to be sistered into the 2x4...unless you notch the 2x6 at each strongback location. Find 2012 Weatherization Specifications. a day until they're level. So what I understand that you are saying, is to build a wall running the length of the house to support the peak of the roof. No deck, less-strong floor, and dangerous navigation with trampling of insulation. ix shrinkage may occur. Phone: +64-3-332-3159, and Winstone Wallboards Ltd Step 1 Cut a plank to fit the length of the joist run. A single header nailed to the cut joist and uninterrupted joists will work for openings less than 4 feet. 16 inch or 24 inch or something else? Start your subscription today and save up to 52%. That’s a big size and strength difference between the two types of attic joists, even if the joist spacing is the same. Metal corner beads are more crack and separation prone in drywall installations than plastic tape-on or glue-on (using spray adhesive) or mud-on corner bead material. Details of the coefficients of thermal expansion (or contraction) and the coefficients of moisture-related expansion and shrinkage of plasterboard are. For now, note that beam stiffness and strength are in linear proportion to thickness, and cubic to height. The average national cost for attic renovations is about $40,000, with a typical range of $4,600 to $80,000.Finishing ranges from $4,600 to $16,400, while a more comprehensive remodel runs $8,000 to $80,000.This translates into $30 to $200 per square foot, depending on the square footage of usable space, the amount of work and the materials used to bring the room to life. 219 Opawa Road Permafrost settlement in Alaska: The two photographs above show severe plasterboard cracking in the same Alaskan home illustrated at the top of this page. As for that galvanized pipe running into your chimney...it could very easily be a plumbing vent pipe...or it could be  a vent pipe for a gas appliance...more likely a plumbing line vent...but as earlier pointed out, it could be one of a number of things and like it or not, may still be in operation. it was common place in them days to do that, and even though it was one by. Otherwise a cosmetic repair may be wasted and a more-serious problem such as a leak, structural damage from loading, rot, or insects, may need to be repaired. As for the random vertical boards attached to your rafters.... from the only photo that you presented depicting these boards, it appears that your rafters have collar ties attached and the vertical 1x hanging down from the collar tie, could easily be just that, a hanging support designed to be attached to your 2X4 joist to keep the ceiling joist from sagging. That is, by times 4.5. I go way beyond compensating for the divot. I feel it as I walk and work, in about a dozen homes where this has been applied so far. It seems to me that they would be strongest if run the same direction as the joists. Oh yea, I almost forgot..... you stated your intentions about using the strongbacks, but then asked the following question...to which I'm para-phrasing here: " I'm going to take the good advice presented to me and install 2X6 strongbacks running the length of the attic...........the only other issue I have is what type of flooring material to use.....if I put it on top of the strongbacks the ply will flex if supported only every 5 feet..... "Should I add some 2x6s in-between ( the 2x4s) or (add) more strongbacks? Ceiling joists are typically 2×8 lumber, floor joists are usually 2×10 or 2x 12 lumber. For example, ridging may appear when forces (thermal expansion, moisture expansion) cause the material to expand, while cracks or tears may appear in plasterboard or gypsum board when the opposite site conditions (cooler temperatures and more dry conditions) cause gypsum board to contract. [4a] Boral, "Plasterboard Specifications", retrieved 12/11/2013, original source: http://www.boral.com.au/plasterboardexport/ plasterboard_specifications.asp. Do not hang gypsum board on wet or pressure treated framed ceilings or walls without special design provisions such as the use of resilient channel supports. Below is a second example of a similar effect. I've come across pipe this size that was used for plumbing vent lines. I don't think it was a plumbing vent, maybe an old stove? Robert Milner, BE, MEngSc, Locate the wire inserted through the ceiling, and then locate the ceiling rafter that is closest to the spot. Exactly what I was thinking....great minds and all I guess.J. one by in them days was stronger than most two by we have today. and also DRYWALL MOLD TESTING.Details are at PLASTERBOARD EXPANSION COEFFICIENTS. Plumb the corners with a level and brace them with 2x4s. “with the strong back at mid span …..increase the 2 by six to say 2 by 10 then the 2 by 4 flat part of the strong back becomes the sole plate for a pony wall to take the sag out of the roof. ", http://www.southernpine.com/spantables.shtml, First Day at the Virtual IBSx: Stuff You Won't Want To Miss, Plus, get an extra 20% off with code GIFT20, Simple Way to Make Old Walls Straight and Plumb, Expert insights on techniques and principles. In another post it was suggested I need 14 inches of space to insulate my ceiling properly for this climate - Toronto Canada. At the ends, use metal hurricane straps to connect the beam to the jack studs. The only other issue I have left to resolve is what type of flooring material to use. What would that be used for? They were definately put there by someone for a purpose. Moisture or humidity variation: significant changes in the building moisture level or thus in the moisture content of plasterboard or gypsum board can cause expansion or shrinkage sufficient to produce a 1/16" wide or larger crack even if other forces are not in play. One of the things that I am ecstatic about completing now that we are settled in, is turning the run-down garage that came with it into a fully functional shop. Drywall tape type used for corners: do not use mesh type drywall tape in building corners nor at ceiling/wall joints. Avoid driving nails within an inch of each other or an inch of the board's edge to prevent cracking or splintering the wood. This crack pattern appears here in a stucco exterior, but it was duplicated on drywall interiors as well. from the edges or ends being forced together from exposure to alternating periods of high and low Use that new attic ladder of yours to haul your butt down out of there ...before you fall down out of there and bring the house down with you! GRC or gypsum ridging and cracking has been reported world-wide, with most writers commenting from Australia, Canada, New Zealand, the U.K. and the U.S. [1][2][4], The Gypsum Association's definition of ridging is. lumber and proper detailing, however, drywall problems as per jaybirds drawings if you were to increase the 2 by six to say 2 by 10 then the 2 by 4  flat part of the strong back becomes the sole plate for a pony wall to take the sag out of the roof. install 2x6 strong backs running the length ( 22 feet ) of the attic. Aren't we all eager to learn new things, and to do better? InspectAPedia tolerates no conflicts of interest. If 16 inch OC, then for light storage, doubling up on the 2x4s to make them 4xs should be OK. The ceiling we’re wanting to clad is the bottom of the concrete second floor slab which is 4-years old and has had no moisture issues in the past. OPINION: As we note below, many experts opine that the dominant forces in drywall cracking or tears are probably framing shrinkage and building movement - a view with which I agree. I needed to cut one of those 2 x 6’s out to make our attic access larger. All fixings to the joists or rafters should be done by screwing the panels down. Inspect, document, and correct site drainage, footing drain defects, building leaks and other sources of abnormal building moisture or of abnormal building movement, settlement, framing shrinkage. Foam Board Insulation Types. string line the bottom of the rafters. Sep 10, 2017 - Discussion on the integrity of 2x6 ceiling joists holding up heavy loads. Interior Job Condition Specifications For The Application of Drywall Joint Compounds, DWFC. Manage building & gypsum board humidity and temperature: Document the building humidity and temperature at the time of drywall application [and we recommend documenting as well the actual temperature and humidity level or moisture level of the drywall product being installed), and document abnormal variations in building temperature and humidity indoors beyond its design parameters. Status Quo: 2x4's (actual size) spaced 16" on-center running the width of the building uninterrupted, with the ends resting on top of the wall top plate. "I have learned so much thanks to the searchable articles on the FHB website. We have 171 full length hd movies with BBW HD Porn 1080p in our database available for … This beam bears more load than any other in my crawl space, yet suffers a carve-out passing the bathtub drain. Couldn`t tell you what that pipe was...coulda been any of a number of things....I`d make damn sure it wasn`t still live before attempting to remove it.J. The fact that you simply asked this question...about using 2 different systems at the same time in order to provide a better nailing base for your intended flooring, simply suggests that you really haven't grasped the structural concepts of what role a joist plays and how it affects the structural integrity of everything connected to it. I'm currently planning to reinforce the loft floor by sistering new joists to existing ceiling joists in order to lay a floor and make it more useful rather than just very very light storage. In a demonstration that the ceiling crack stress point sketch is not just theory, our photos just above show cracks at the taped intersection of ceiling to partition wall at a natural stress point. I am back, to see what happens with my post. D. Reynolds. wall panels. Gypsum Association, 6525 Belcrest. Often it is sufficient to just do all that the situation allows for strength and insulation, as in availability of headroom. Now it is time to use some wood and screw it into place on the original joist as well as the cross beam. The use of joist hangers facilitates this repair. Do you see the logic here? The drawings of roof truss uplift and corrective measures for truss uplift shown here are provided courtesy of Carson Dunlop Associates and appears in their Illustrated Home. So I have posted some pictures. Why do we see that the actual ceiling crack is not nearly this wide? The long sides of the loft boards should be laid at 90 degrees to the joists and the ends of every board should always meet on a ceiling or floor joist. Where, when & why does drywall crack? Australia, ‘Walls & Ceilings’ Magazine ‘Drywall Cracking on a Global Scale’ By Greg Campbell March 9, 2001 temperature and humidity extremes due to thermal or hygrometric expansion. Exterior walls of wood-frame construction shall be designed and constructed in accordance with the provisions of this chapter and Figures R602.3(1) and R602.3(2) or in accordance with AF&PA's NDS. To transfer the weight that the now cut ceiling joist would need to carry I needed to add a header to either end of the now cut 2 x 6. www.smartwood.org, [24] "Joint Compounds", United States Gypsum Company, 125 South Franklin ST., PO Box 806278, Chicago, IL 60680-4124, retrieved 8/16/12, original source: http://www.usg.com/interiors/joint-compounds.html [copy on file as Mud_Types_USG.pdf], [25] Gypsum Construction Guide, National Gypsum Corporation, [29] Plastering Skills, F. Van Den Branden, Thomas L. Hartsell, Amer Technical Pub (July 1, 1985), ISBN-10: 0826906575, ISBN-13: 978-0826906571 [purchase at Amazon.com], Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. The attic itself is 15 wide by 22 long. A broken roof joist is a serious problem that must be taken care of immediately. Here we see a complex soffit structure carrying windows and suspended from a conventionally-framed 2x12 ceiling structure. As for insulation, rent a macine and blow in cellulose insul in the remaining cavities. In response to your comment, I have added another photo to my album of examples, as attached here. Long runs of continuous drywall, especially if more than 30 feet or about 10 meters in its long dimension are likely to suffer expansion/contraction cracking and possibly ridging if control joints are omitted. Cracking and Building Movement, Dickinson & Thornton, 2006, BRANZ Bulletin 418 July 2001 ’Providing for Thermal and Moisture Movement’, NZS 3602 Timber & Wood Based Products for use in Building, Wood Processing Newsletter SCION July 2003 Simpson & Turner, ‘A Field Study of moisture performance of roofs Recommended Specification for Preparations of Gypsum Board Surfaces Prior To Texture, GA. GA-214, Recommended Levels of Gypsum Board Finish. now your ceiling is flat and so is your roof. Continue reading at DRYWALL CONTROL JOINTS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Nail the strongback to the joist that are flat and add a 2x4 block to tie the vertical 2x6 to the ceiling joist. Hopefully the … The ceiling width is interrupted near one end by the distant partition wall you can see in the left hand photo, but the ceiling continues to open up into another room at that end of the house. D. Reynolds. More times than not, the floor structure of an existing attic is actually a ceiling joist. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. The size of the joist determines how much "insulation cavity"  space you can have beneath your floor covering...in your case, a 2X4 is 3-1/2 inches wide, so in this instance, your insulation cavity underneath your new proposed flooring will give you 3-1/2 inches for insulation.