This finished tile floor is installed over a plywood and cement backer board subfloor. Blocking and cross bracing helps transfer part of a floor load to the adjacent truss or joist. Bouncy Floor Laminated-veneer lumber (LVL) Steel beam New concrete footing poured flush with existing slab Lally column permanently supports new beam. Sloping floors are often one of the warning signs that structural engineers look for when analyzing a house. They are usually spaced 12, 16 or 24 inches apart; the size and spacing is based on the length of the span and load (weight) that they’re carrying. It may consist of carpeting, tile, vinyl, linoleum, laminated flooring or other similar products. Dearohdear4 Mon 22-Jul-19 17:34:58. Check out the previous episode where we discuss the plans for this kitchen. If the sub floor is not strong enough to span the distance between the floor joist, trusses or supporting beams, then sponginess may occur. Revolutionary wood product which allows you to eliminate bounce and vibration in wood frame construction floors. Load bearing wall removed or altered on first floor. Thus, damaged or cracked trusses or joists. Basically, undersized floor joists or trusses, or spacing too far apart may lead to sponginess. What are they a sign of and what can be done? Trusses undersized, spaced too far apart or sub floor not proper strength for span, 7. A springy or spongy feeling could … In some of our articles we provide links to products that may be beneficial given the subject matter of the content. The Joists are laid out in two area. This does not happen very often. Does anyone have or have had bouncy floors upstairs? Bouncy upstairs wooden floors?! Will Water Softener Improve My Drinking Water? There will be a … Floor trusses are engineered framing members which are manufactured off site and transported to the building site by truck. My bedroom is over a double garage. Our floors are somewhat bouncy, especially in big rooms with long joists. Replies: 9 Views: 839. Home » Interior » Floors » Bouncy and Spongy Floors Can Be A Structural Concern Or Merely An Annoyance. The first floor has now developed a significant bounce which wasn't there before when we last inspected 12 weeks ago. Mr Sparkle 8 Jan 2019. However as you can see on the following video new floor is bouncy (and it looks even worse than on the video). How To Measure If Your Floor Is Sloping, Level Or Sagging: When Serious? We show you how to lay floor boards over the leveled joists, how to cut the floor boards to the right shape and how to use a chalk line. Life Expectancy Of A House: Will It Last 50,100 or 200 Years? Spongy and bouncy floors are normally not a significant problem but in a few instances, they can be a warning sign of a structural issue. The floor in the bedroom has a lot of bounce in it. This may indicate that there could be more than one cause of the spongyness or that there should be a little higher level of concern. Floor joists, whether they be solid wood, engineered lumber like yours or even steel, can deflect or bend under a given amount of weight and a given amount of span. Plumbing or roof leaks that go undetected or not repaired in a timely fashion can cause deterioration of the structural strength, resulting in sponginess. A cracked floor joist or truss may weaken the support holding up the sub floor. Once weakened it will no longer be as stiff but may be spongy, especially if there are two or three framing members that are cracked or damaged next to one another. Usually the sponginess will only be in a small area (i.e. Matt knew all about bouncy floors and insisted that his wood-frame bedroom floor be as stiff as a steel-reinforced concrete slab set on steel i-beams! When thinking about why a floor is spongy or bouncy, step back a think about some of the reasons listed below, see if any of them explain why your floor is spongy or bouncy. Mr Sparkle, 23 Dec 2018, in forum: Floors, Stairs and Lofts. Tom's solutions for fixing bouncy floors, shown here in order of effectiveness, are easiest on the first floor, where joists are accessible from the basement or crawl space. Depending on a number of factors, if you have a floor that spans 10 feet in length, then a defection of a 1/4 or 1/3 of an inch might be acceptable. Excellent for retrofitting your floors. Sloping floors are most often caused by normal and acceptable deflection (bend) in the wood joists which comprise the floor structure. The joists are 190 X 70 placed at 400 Centres. As homeowners we quickly get used to a floor that has a little bouncy or spring to it as we walk across it and seldom give any thought to whether there is a problem. If you take a 2x10 solid lumber floor joist that is spanning 16 feet and place a 94-pound sack of cement in mid span, the floor joist will bend downwards a given distance. Foundation Cracks: Causes, Seriousness and When To Worry. per square foot.Using some quick math and a good bit of Googling, I figured out that my little upstairs bedroom could safely hold quite a bit of weight. OSB board and plywood will not stand up to water over time; the glues that hold these two products together easily fail after prolonged exposure to water. The old-fashioned mud method of floating a thick mortar bed in preparation for the tile has given way to using cement backer board over a plywood subfloor. In some cases (i.e. I think that the main cause is that they used 2x8 joists on 15-20' spans. 'bouncy' upstairs floors. Flooring specialist advised us that installing plywood boards and porta nailing would not be necessary in our case. Lack of “Cross Bracing” or “Blocking” where beneficial, If a concrete slab but finish floor is spongy in places, Causes of Houses Settling: When Serious And What To Look For, Sloping and Sagging Floors: What's Acceptable and When A Structural Concern, House With Sloping Or Sagging Second Floor but First Floor Level. Flatness of the floor. There are two things that can cause Victorian house upper floors to become excessively bouncy. 12d or 16d nails spaced 16 in. Paranoid about my house and bouncy floors Tags: Miscellaneous I just bought a 1982 house whose previous owners knocked out a wall so that the kitchen, dining room and living room are all open. Their added strength will … - See 1,054 traveller reviews, 134 candid photos, and great deals for Tavistock, UK, at Tripadvisor. This process normally requires an engineer to calculate what size the foundation is required, what size of rafters and how far apart they should be and to calculate what size of floor joist or trusses are needed; including the type and thickness of the sub floor. Log in. I never thought my collection (which is stored in an upstairs room in a UK house built 15 years ago) was that big: It consists of: a 40cm Ikea Billy bookcase with all 6 shelves full of omnis and masterworks and two 80cm Billies each with 3 of the 6 shelves full of omnis, masterworks, TPBs and Absolutes. At times there may be spongy floors that appear to slope or sag, as well as, being spongy. If the concrete slab is not flat but dips in places or has a hump, then the flooring laid on top of the slab may bow or be spongy when stepping on the areas that dips or does not have a fully flat surface. Common reasons for sloping or sagging second story floors. Bouncy and Spongy Floors Can Be A Structural Concern Or Merely An Annoyance. You can also pull up the subfloor and look at it from above, but this is not the best option. Not only will they note how much movement there is, but they will also listen for creaking or popping sounds and look for other “Red or Yellow Flags” of structural issues. Installing tile over a wood subfloor is a lot easier today than it was when I started my remodeling career. Bouncy floors are one of the most vexing problems faced in houses, both new and old. Since one of the warning signs of foundation or framing problems is a spongy or bouncy floor, engineers will usually examine why a floor or section of a floor is spongy. If no permit was obtained, the likely hood of improper engineering or poor workmanship increases, and problems may arise; anywhere between minor to major. © 2020 Buyers Ask. He knew the building code allowed simple 2 x 10’s to span the width of the addition but he instructed the architect to put in wood floor trusses that were 20 inches tall! If a finish floor is laid directly on a concrete slab and it’s spongy, then the reason may relate to. A sub floor generally lays on top of floor joists or floor trusses and will normally be laid perpendicular to the joist or trusses: it should be considered structural in nature, not cosmetic. Replies: 6 Views: 532. © 2020 BuildingAdvisor.com®; All rights reserved. Many of the causes for spongy and bouncy floors may also be associated with sagging floors or floor failures. Damage from rain and snow doing construction, 4. Spongy and bouncy floors generally are of little concern unless the cause relates to a serious structural issue. A few, very few, will just have the concrete slab exposed with no covering: often stained or polished as the finished floor. Your email address will not be published. Homes with a concrete slab often have tile, carpet, laminated or other types of wood flooring or some form of vinyl or linoleum flooring laid on top of the concrete. No one likes the feel of a supposedly solid floor bouncing or sagging underfoot. Trusses that are undersized for the weight that they are carrying will often sag, be bouncy or spongy when walked upon. After some research, I discovered that an upstairs floor in a modern home (this may not apply to older homes) is rated to hold between 30 and 40 lbs. Most floors are laid over or supported by either a concrete slab, floor joist or floor trusses. Bouncy Floor Remedy. How To Install Two-Ply Roof Underlayment. Given that we'll have access to the subfloor, what can be done to make the floors less bouncy? 7 Common causes of spongy or bouncy floors, 2. We are going to replace/install hardwood in several areas. These floor joists are often 2 x 6, 2 x 8, 2×10 or 2 x 12 pieces of lumber running parallel to each other that the sub-floor is laid on. Sagging can be the result of undersized joists, an undersized support beam, or support posts that have rotted at the bottom or settled into the ground. Is that thundering on the floor in the flat above ever going to stop, or is it just the short bit where your upstairs neighbour does a few burpees before Sunday, December 6, 2020 11:14 AM They basically serve the same purposes as a floor joist but are often more economically and can be used on longer spans. Sloped floors are common in older homes, and even in homes as new as 15 to 30 years. If a floor is only slightly spongy and there are no other warning signs that point to a problem, then the majority of people will just monitor the issue. A long piece of wood will tend to bow when weight is placed on it, this is natural, however, building codes and engineers have guidelines on how much is acceptable or safe. A gym at home is super convenient, but some of us don’t have room in the basement, garage, or first floor, or we’re stuck in an apartment building. Note. It’s this situation where you have to consider whether your upstairs or second+ story floor can support your gym safely. We receive a small commission if you choose to purchase a product or service after following one of our affiliate links but the price is the same for you. Floor joists or trusses may crack because there was too much weight put on them, i.e. The finish floor layer is the top layer. The flooring is 18MM Tongue and grove chipboard. Whats funny is that a first time visitor or home buyer will notice that a floor is spongy; they will often stop when they notice it and even shift their weight up and down to verify that it is spongy. Contractor Filed a Lien – What Are Our Options? If dark discolorations are noted, then there may be a mold and mildew, which usually means that there is a moisture problem. Both upstairs bedrooms and the landing are very bouncy. If the floor deflects a 1/2 of an inch there may be a concern. Stiffening upper floors typically requires removing some or all of the finished ceiling below. For a bouncy ground floor, you need to get under the house or look at the floor from the basement. older homes on a raised foundation) with a post and beam support system; 4×4’ or 4×6’s may be used in place of floor joist or trusses. ... UK … These are often in 4 x 8 sheets and 1/2 to 1 inch thick and either nailed or screwed down to the floor joist or trusses. Have you investigated and solved the issue causing the bounce? Peruse the extensive selection of new static caravans for sale, have lunch in the restaurant and pop upstairs to The Images Function Suite where we will take care of entertaining the kids. Over the years this type of damage and deterioration will cause a floor to flex or feel spongy and if not attended to, it will fail. If there is a second floor or a raised section of a floor that is framed, rather than directly on the concrete. These are the ones that seem to have the most bounce. The most common sub flooring materials being used to in homes today are OSB, Oriented strand board and plywood. The closer that floor joists or trusses are together, all other things being equal, the more weight that they can carry and there is less bounciness or deflection. Wood floor joist are horizontal structural framing members placed on their edge running from wall to wall or wall to beam. Years ago, while working as a carpenter, I helped stiffen a bouncy floor by nailing a new 2×10 to each of the 2×10 joists that supported the floor. Knowing some of the reason why floors are spongy and the causes can help one determine whether further investigation should be done. when building the home the contractor put a heavy pallet of floor tile in center of the floor or a large stack of plywood that was just too heavy for how the floor was engineered. Floors creaking may be related to the installation of the floor or to the homes' foundation settling a little. In the UK, most modern building have 8' x 4' chipboard sheets screwed into the joists, and the "floating" floor lays directly on these sheets. However, if there has been remodeling, an addition or walls moved and there was not a set of engineered plans, then problems may arise. The floor has a real bounce and it's a bit of a pain because it also sags meaning it's not level which is a pain with some furniture. John D v2.0 11 Jun 2019. Crack damage may occur for a number of reasons. 2 to 4 square feet) and not the entire floor. This project is about levelling old timber floors, repairing and replacing timber joists. As homeowners we quickly get used to a floor that has a little bouncy or spring to it as we walk across it and seldom give any thought to whether there is a problem. (3 Posts) Add message | Report. Don't guess if a floor is sloping or out of level, because there are five quick and easy ways to measure. In addition to the floor being bouncy or spongy, you may see cracks in the tile or grout, if it’s a tile floor or hear a snapping or creaking sound if its a laminated type of floor. on center Steel or LVL beams can be used in lieu of dimen-sional lumber. Some run across the span (16. Levelling Floor Joists. Robbox, 4 Jun 2019, in forum: Floors, Stairs and Lofts. How to Fix Springy and Spongy Floors. During construction if the wood sub flooring (OSB Board or Plywood) gets wet, especially for prolonged periods of time, the sub floor loses a portion of its structural strength. Igloos - Are they heated, do they have windows and how long does it take to build one? Check the base boards and lower portions of the wall for stains as well. Hi, our house is approx 160 years old and pretty solid except one of the upstairs floor. Termites love to dine on wood and in doing so they will weaken it, eventually to the point where it loses much or all its structural strength. We will be there Saturday and Sunday with bouncy castles, surf simulator, giant garden games and more. Settlement may cause damage to a house, but some settlement can be prevented or reduced. How long will a house last is a question that many wonder about when they buy a house. Musty odors are another indication of mold or mildew. Actual floorboards (generally older buildings in the UK) are usually lengths of softwood about 6" wide spanning the entire room. If a load bearing wall is removed on the first floor, then the second story floor joist or trusses may drop down in the area where the load bearing wall was removed. Who does wonder about a spongy or bouncy floor? Taylors: Springy floor upstairs !! It is not uncommon for this type of construction to have post piers that will settle or shift over time. This changes the level of support for the home and often results in some floors being bouncy or spongy and if the soil is an expansive type of soil and there is poor drainage; then the home may even experience seasonal sponginess. In older homes the sub floor may be 2×6’s or 1×6’s laid perpendicular or at a 45 degree angle to the floor joists or trusses. There may be no or insufficient cross bracing or blocking between the joist or trusses. Homes that are built on a concrete slab seldom have spongy floors, but there are two conditions where they may have a spongy floor. If a second story floor is spongy or bouncy and the first-floor ceiling under the spongy area has drywall cracking in the ceiling or cracked and damaged plaster, then there should be a higher level of concern. - Terms & Conditions - Contact Us. Homes that are built during the rainy season and fail to get roofed and wrapped properly are more susceptible to this type of damage. If during a storm a heavy tree came crushing down on the home, it could damage the joists or trusses. Just as floor joist, they usually carry the sub floor. We're adding a large open plan extension with a couple of bedrooms on the floor above it - posi trusses went in 16 weeks ago with yellow tongue on the floor upstairs. Cracks develop in wall and ceiling areas. Termite damage to floor joist or truss, 5. Ultimately you will have a level floor with well fitted boards. It has floorboards and does'nt appear to have hardly any gap between it and the downstairs ceiling which has exposed beams. If your foundation has a crack or cracks know what to look for to determine if they are major or minor. Many homes on raised foundations may have a post and beam construction supporting the floors. A concrete slab is usually poured on top of the soil (ground) and is about 4 to 6 inches thick with steel reinforcement in the concrete to make it stronger and reduce cracking. Most floor bounciness or sponginess relates to layer number one or layer number two issues. Joists). If the sub floor is 1/2 inch thick and it should have been 5/8 or 3/4 of an inch thick, then you may get sponginess or sagging. Insulating A Cathedral Ceiling With Foam Board. Floors, roofs, foundations and many other components of a building are required by code to meet certain structural requirements. Bounciness is usually caused by undersized floor joists. Also, they didn't realize the time it takes to build one and about the entrance feature. Moisture stains on the floor may indicate that there has been a leak or moisture issues. We moved into a Victorian terrace house over a year ago- the survey didn't raise any concerns but recently we've noticed that the floor in the living room bounces a little when we walk across it - the bounce is localised to one part of the living room - how can we distinguish loose floorboards from something structural (e.g. Sloping floors may be a warning sign of structural problems. Should an engineer miscalculate or the builder fails to follow the plans, then a flooring system may sag, be spongy or even fail. Contributing editor Mike Guertin teams up with structural engineer David Grandpré to detail six common, and not-so-common, ways to stiffen up the joists and keep the china cabinet from wobbling. 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