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. Log in. Musty odors are another indication of mold or mildew. Who does wonder about a spongy or bouncy floor? 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. Also, they didn't realize the time it takes to build one and about the entrance feature. 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. Common reasons for sloping or sagging second story floors. The finish floor layer is the top layer. Joists). Load bearing wall removed or altered on first floor. Spongy and bouncy floors generally are of little concern unless the cause relates to a serious structural issue. 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. 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. Many of the causes for spongy and bouncy floors may also be associated with sagging floors or floor failures. This does not happen very often. Bouncy and Spongy Floors Can Be A Structural Concern Or Merely An Annoyance. Moisture stains on the floor may indicate that there has been a leak or moisture issues. 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. This project is about levelling old timber floors, repairing and replacing timber joists. Given that we'll have access to the subfloor, what can be done to make the floors less bouncy? Should an engineer miscalculate or the builder fails to follow the plans, then a flooring system may sag, be spongy or even fail. Contractor Filed a Lien – What Are Our Options? 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. Levelling Floor Joists. If the floor deflects a 1/2 of an inch there may be a concern. 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. Taylors: Springy floor upstairs !! Stiffening upper floors typically requires removing some or all of the finished ceiling below. Bouncy Floor Remedy. Home » Interior » Floors » Bouncy and Spongy Floors Can Be A Structural Concern Or Merely An Annoyance. 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. There may be no or insufficient cross bracing or blocking between the joist or trusses. How To Install Two-Ply Roof Underlayment. 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. The floor in the bedroom has a lot of bounce in it. 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. However as you can see on the following video new floor is bouncy (and it looks even worse than on the video). - Terms & Conditions - Contact Us. Basically, undersized floor joists or trusses, or spacing too far apart may lead to sponginess. There are two things that can cause Victorian house upper floors to become excessively bouncy. Homes that are built on a concrete slab seldom have spongy floors, but there are two conditions where they may have a spongy floor. In some of our articles we provide links to products that may be beneficial given the subject matter of the content. Sloping floors are most often caused by normal and acceptable deflection (bend) in the wood joists which comprise the floor structure. Trusses that are undersized for the weight that they are carrying will often sag, be bouncy or spongy when walked upon. Floor trusses are engineered framing members which are manufactured off site and transported to the building site by truck. Cracks develop in wall and ceiling areas. Mr Sparkle 8 Jan 2019. We are going to replace/install hardwood in several areas. Replies: 6 Views: 532. How long will a house last is a question that many wonder about when they buy a house. 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. 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. It has floorboards and does'nt appear to have hardly any gap between it and the downstairs ceiling which has exposed beams. The joists are 190 X 70 placed at 400 Centres. At times there may be spongy floors that appear to slope or sag, as well as, being spongy. 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. Trusses undersized, spaced too far apart or sub floor not proper strength for span, 7. Our floors are somewhat bouncy, especially in big rooms with long joists. 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. 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. (3 Posts) Add message | Report. If the sub floor is not strong enough to span the distance between the floor joist, trusses or supporting beams, then sponginess may occur. 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. 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. ... UK … Hi, our house is approx 160 years old and pretty solid except one of the upstairs floor. 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. Your email address will not be published. Sloped floors are common in older homes, and even in homes as new as 15 to 30 years. 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. 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. Don't guess if a floor is sloping or out of level, because there are five quick and easy ways to measure. © 2020 BuildingAdvisor.com®; All rights reserved. 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. Bounciness is usually caused by undersized floor joists. Other reasons include... People are surprised about beds in igloos and how they are made. 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. 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. Life Expectancy Of A House: Will It Last 50,100 or 200 Years? They basically serve the same purposes as a floor joist but are often more economically and can be used on longer spans. Just as floor joist, they usually carry the sub floor. Both upstairs bedrooms and the landing are very bouncy. Floor joists or trusses may crack because there was too much weight put on them, i.e. Flooring specialist advised us that installing plywood boards and porta nailing would not be necessary in our case. 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. Damage from rain and snow doing construction, 4. Crack damage may occur for a number of reasons. Sloping floors are often one of the warning signs that structural engineers look for when analyzing a house. Replies: 9 Views: 839. What are they a sign of and what can be done? 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. However, if there has been remodeling, an addition or walls moved and there was not a set of engineered plans, then problems may arise. Spongy and bouncy floors generally are of little concern unless the cause relates to a serious structural issue. 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. Insulating A Cathedral Ceiling With Foam Board. 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. Have you investigated and solved the issue causing the bounce? Foundation Cracks: Causes, Seriousness and When To Worry. Most floor bounciness or sponginess relates to layer number one or layer number two issues. A cracked floor joist or truss may weaken the support holding up the sub floor. A springy or spongy feeling could … 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 In some cases (i.e. Check out the previous episode where we discuss the plans for this kitchen. Usually the sponginess will only be in a small area (i.e. Some run across the span (16. 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. 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. on center Steel or LVL beams can be used in lieu of dimen-sional lumber. No one likes the feel of a supposedly solid floor bouncing or sagging underfoot. Ultimately you will have a level floor with well fitted boards. 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. Actual floorboards (generally older buildings in the UK) are usually lengths of softwood about 6" wide spanning the entire room. 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! Revolutionary wood product which allows you to eliminate bounce and vibration in wood frame construction floors. 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. Thus, damaged or cracked trusses or joists. Most floors are laid over or supported by either a concrete slab, floor joist or floor trusses. #1 The support: Concrete Slab, Floor Joist or Floor Trusses. 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! Will Water Softener Improve My Drinking Water? 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. Settlement may cause damage to a house, but some settlement can be prevented or reduced. Excellent for retrofitting your floors. John D v2.0 11 Jun 2019. Laminate flooring is susceptible to this and may even make a creaking of snapping sound when stepped on. 7 Common causes of spongy or bouncy floors, 2. Bouncy floors are one of the most vexing problems faced in houses, both new and old. Bouncy upstairs wooden floors?! 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. You can also pull up the subfloor and look at it from above, but this is not the best option. Doing this helps stiffen a floor and reduce sponginess or bounciness. Robbox, 4 Jun 2019, in forum: Floors, Stairs and Lofts. 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. Flatness of the 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. 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. 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. 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. 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. Blocking and cross bracing helps transfer part of a floor load to the adjacent truss or joist. It’s this situation where you have to consider whether your upstairs or second+ story floor can support your gym safely. Many homes on raised foundations may have a post and beam construction supporting the floors. Plumbing or roof leaks that go undetected or not repaired in a timely fashion can cause deterioration of the structural strength, resulting in sponginess. Does anyone have or have had bouncy floors upstairs? 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. How to Fix Springy and Spongy Floors. The first floor has now developed a significant bounce which wasn't there before when we last inspected 12 weeks ago. Homes that are built during the rainy season and fail to get roofed and wrapped properly are more susceptible to this type of damage. Note. This finished tile floor is installed over a plywood and cement backer board subfloor. These are the ones that seem to have the most bounce. Bouncy Floor Laminated-veneer lumber (LVL) Steel beam New concrete footing poured flush with existing slab Lally column permanently supports new beam. The flooring is 18MM Tongue and grove chipboard. 2 to 4 square feet) and not the entire floor. The most common sub flooring materials being used to in homes today are OSB, Oriented strand board and plywood. 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. 12d or 16d nails spaced 16 in. Floors creaking may be related to the installation of the floor or to the homes' foundation settling a little. How To Measure If Your Floor Is Sloping, Level Or Sagging: When Serious? 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. The Joists are laid out in two area. If a finish floor is laid directly on a concrete slab and it’s spongy, then the reason may relate to. Wood floor joist are horizontal structural framing members placed on their edge running from wall to wall or wall to beam. Dearohdear4 Mon 22-Jul-19 17:34:58. Check the base boards and lower portions of the wall for stains as well. There will be a … I think that the main cause is that they used 2x8 joists on 15-20' spans. 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. Their added strength will … 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. If during a storm a heavy tree came crushing down on the home, it could damage the joists or trusses. Installing tile over a wood subfloor is a lot easier today than it was when I started my remodeling career. 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. 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