How to frame a floor in an unfinished crawl space?


I've got a "crawl space" (really an unfinished space) under the main floor in a 2-story-with-basement house. I'd like to build essentially a deck frame and cover it in 3/4" plywood so that we can more easily use it as a storage area.

Picture of the space:

I've been planning on attaching a band joist to the concrete foundation on the right side, and additional band joists attached to the support posts on the other side (left side of the picture). I'd then run floor joists between them (approx. 7.5' in length) supported by joist hangers.

Is attaching to the support posts a bad idea? Not being a structural engineer, I worry about the additional load, and the potential for weakening those posts by attaching the band joists with lag bolts. Should I be worried, or is there a better way to support that side of the floor that doesn't involve digging down and pouring concrete...

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Estimate how much insulation and materials you will need. Do this by measuring the length and width of areas to be insulated and figuring out how many square feet of insulation will be necessary to complete the project. Don't forget to measure the distance between your floor joists. Typically, joists are installed 16 inches on center and will measure roughly 14 to 15 inches in between. Knowing the average space between the joists will determine if you can purchase precut insulation or whether you will have to cut each piece separately to fit.

Determine which kind of insulation you will need for your project and what way your vapor barrier---the paper side---of the insulation will face. This will vary and is based on your location and climate. This kind of information can be found at your code enforcement office or materials supplier, or by visiting the manufacturer's website. Also decide whether to purchase batts or rolls (again, this will vary according to your project...

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Determine your ground floor layout before framing the floor. This is important because you must provide corresponding support beneath your floor for any future load-bearing walls. If you are unsure about this process, contact a builder or have an engineer look at your floor plan.

Install the sill plate that will form the bottom wood layer between your floor and the concrete foundation. When you poured the foundation, you installed anchor bolts into the concrete in anticipation of the sill plate. Drill holes in the sill plate that correspond with the anchor bolts. Slip the plate into place, attaching nuts to the bolts.

Use only treated lumber for the sill plate. The typical sill plate is 2-by-6 inch dimensional lumber. Any time wood encounters concrete, use only treated lumber. After placing the sill plate, fasten it to the foundation with concrete screws, approximately every 2 feet in addition to the anchor bolts.

Set the rim joist. The rim joist...

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Crawl Space
Learn about working with crawlspaces with, including information about controlling termites and mold, installing insulation, and more.

Crawl space encapsulation is a type of vapor barrier installed in a raw, unfinished space underneath a home to prevent, mold, mildew and dampness from entering the upstairs space.

Crawl spaces need to be insulated and protected from the elements in the colder climates. Warm climates tend to have semi-open crawl spaces, which are a place for moisture, mould and rodents to collect. There are a number of health issues that can be aggravated by moisture and mold.

With crawl space sealed off from cold and moisture, your crawl space can be linked to your household HVAC system via vents. That way, warm air is circulating under your floors, warming them up and helping to keep you toasty.

Crawl Space
A crawl space has several advantages over basements and slabs: ...

Crawl Space...

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how to lay a subfloor above a crawl space

Insulating a subfloor crawl space will help cut damp drafts rising. An insulation process you can use consists of laying a plywood subfloor over the concrete slab.

How to Install Hardwood Flooring Over Crawl Spaces. How to Install Incomplete Natural Hardwood Floor Planks Over a Wood Subfloor.

With Kraft-faced insulation, the facing is usually against the sub-floor. In an unvented crawl space. you’on the subject of about to install the insulation.

Deal with it that the floor of the crawl space is surrounded. If there is no concrete slab in your crawl space, lay a vapor barrier. as the plywood floors above act as.

To pour a floor...

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Related to : How to Deepen a Crawl Space How to Deepen a Crawl Space by Davidpaul007 in Home & Garden A crawl space is the open space beneath a house's first floor joists and within its foundation walls. Unlike a basement, it has no access from the building interior. Most have a dirt floor covered by a thin layer of plastic that prevents ground moisture from entering the space (see Reference 1). Lo
How to Turn Your Crawl Space Into a Living Space by picamiolo in Home & Garden Home renovations not only add value to your home but they also provide you with a sense of newness with the rejuvenation of the renewed areas. The possibilities of home renovation projects are numerous, and popular renovations include bathrooms and kitchens. If you are looking to increase the amo
How to Rid a Crawl Space of a Fox by Vlad Sirenko in Home & Garden Look at pictures of foxes and you might think that these little animals are too cute to be dangerous. In actuality, foxes cause a...
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Inadequate insulation lets heating or cooling energy escape through your walls and ceilings. To keep this energy in, and to keep your heating costs down, you need to wrap the entire living area of your house in the proper amount of insulating material. Easier said than done, right? Well, in this article you will find the answer to all of your insulating queries -- where to insulate, what to insulate with, and how to tackle tough insulating projects. Let's begin with a little introductory information about insulation.

Where to Insulate

Insulation should go between the floor and either a crawl space or unfinished basement, between the ceiling and an unfinished attic, between the attic and the roof if the attic is finished, and inside all exterior walls including those adjacent to an unheated garage. The goal is to envelop the entire living area in insulating material.

Types of Insulation

Insulation requirements are defined in terms of the R-value. A...

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InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

This article describes ten steps needed to get into, inspect, clean, and then dry out a building crawl space and keep it dry.

We add advice on how to keep the crawl space dry and clean so that this process doesn't have to be repeated.

This step by step crawl space entry, inspection, cleanout, dryout and keep dry guide explains how to get into or inspect a crawl space even if there is no ready access, how to assess crawl space conditions, how to stop water that is entering the crawl area, how to dry out the space, how to clean up and if necessary disinfect or sanitize the crawl space, and how to keep out crawl space water and moisture in the future.

Green links show where you are. © Copyright 2015, All Rights Reserved.

Damp or wet crawl spaces or basements are often a source of health and...

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For children and perhaps even many adults, the crawl space is shrouded in mystery. Rarely do we think of the dark, dingy, low-ceilinged, and dirt-floored crawl space as providing opportunity. And yet, with planning and elbow grease, you can make even the most intimidating crawl space into an ideal storage area for off-season items. Plus, many of the improvements you’d pursue to make the environment storage-ready would also contribute to overall home comfort and energy efficiency. You’ve got nothing to lose! Read on to learn what crawl space solutions other homeowners choose, then decide which are right for where you live.

What’s this going to take? That largely depends on the crawl space’s current condition. For most homeowners wishing to convert a crawl space into a storage area, moisture is going to be the main impediment. Your crawl space may not have a moisture problem, but there’s only one way to know: get down there and...

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An unfinished basement used for storage and exercise

A former


basement hallway

Cellars are often used in


to keep beer barrels connected to the bar at ground level.

A basement or cellar is one or more floors of a building that are either completely or partially below the ground floor. Basements are generally used as a utility space for a building where such items as the boiler, water heater, breaker panel or fuse box, car park, and air-conditioning system are located; so also are amenities such as the electrical distribution system, and cable television distribution point. However, in cities with high property prices such as London, basements are often fitted out to a high standard and used as living space.

In British English, the word "basement" is used for underground floors of, for example, department stores, but the word is only used with houses when the space below their ground floor is habitable, with windows and...

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A crawl space is an unfinished, accessible area below the first floor of a building. Remember, the main purpose of insulation is to enclose the living space in a thermal envelope. Therefore, if the space below a floor is unconditioned, either the floor or the walls below it must be insulated.

There are two types of crawl spaces: vented and unvented. Vented crawl spaces open to the outside, while unvented crawl spaces are part of the basement. How and what is insulated depends on whether the space is vented or unvented.

In a vented crawl space, the underfloor should be insulated, much as it is installed in ceilings. This may be done either before or after the sub-floor has been applied. JM ComfortTherm®, Kraft-faced and unfaced insulation are all possible products to use for this application. With Kraft-faced insulation, the facing is generally against the sub-floor.

In an unvented crawl space, you should insulate the perimeter walls.

How to...

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Crawl Spaces (also known as Retro Treasure Rooms) are small secret rooms which can be entered by touching trapdoors with ladders in them. They can be found in 5 different ways:

Using the We Need To Go Deeper! activated item (10% chance) Using the Ehwaz rune (8% chance) Bombing a Clean Bedroom rug (100% chance) Bombing a Dirty Bedroom rug (unknown chance) Destroying a rock (unknown very small chance)

Crawl Spaces only have one layout: They consist of 2 ladders and an Item, Chest, Trinket, or various pickups. These rooms are viewed from the side, rather than from above like the rest of the game, and Isaac will experience gravity pulling him to the floor while he is not walking on top of one of the ladders. Under the effects of flight, this gravity has no effect. However, Isaac cannot fly over the walls or floor.

When entering a room pre-determined to contain a Crawl Space entrance, a RNG roll is made using the floor seed. This value will be shifted and...

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To do the basement sub-floor, I’m using a product called Delta-FL, which I picked up at Rona. It’s basically a big roll of dimpled plastic, which sits on top of the basement slab and acts as a vapour barrier, adds an air gap that helps insulate the floor, and also raises the floor up off the ground to avoid water damage in case there is a tiny amount of water. On top of this, I’m putting...

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Crawl Space Waterproofing | Crawl Space Repair & Encapsulation

Many crawl spaces were built without a concrete flooring. They are typically dirt, gravel, sand, and even stone. When a crawl space is built like this water gets inside your home and causes problems. Water causes the deterioration of the support beams, wood flooring, and drywall. When the water sits in an enclosed area like a crawl space mold and mildew are formulated. Typically your ventilation system is located in the crawl space and when there is mold down there the mold spores travel through the house. Radon is another major problem that is associated with an unfinished crawl space in Illinois. There is a very high radon gas level in Illinois and having an exposed surface inside a home simply allows the gasses to flow freely throughout the house.

Basement Waterproofing Corp. is here to help turn your dirty unsafe crawl space into usable storage area while at the same time protecting your home and...

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Like many homes, our cabin is built over a soil crawl space. While crawl spaces offer simple construction and access to the underside of your home, they provide little protection from the environment, and can lead to structural and air quality problems within your home.

Standing water, high moisture levels, soil gas, dust and an abundance of rodents and other critters are common in unsealed dirt crawl spaces.

Our crawl space had all of these, including several inches of water after heavy rains. In addition to water, we also noticed odors and fine dust in our home that seemed to be coming from our heating and air conditioning ducts from the crawl space. We needed to do something.

After some reading, I decided to seal the space with a crawl space vapor barrier. After a few bids running in the $5,000 – $8,000 range (just for the membrane install), I decided to do some research and do it myself. Read on for the juicy details.

As most of you know, crawl...

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Winston Salem's Basement & Foundation Contractor

For over a decade Tar Heel Basement Systems has been the trusted basement and foundation contractor in Winston Salem. We provide permanent, warranted solutions to make sure your home is protected. Armed with patented basement & foundation products and trained professionals makes us the obvious choice.

Basement Waterproofing & Crawl Space Repair

Water and moisture in the basement or crawl space results in mold, rot and structural repair. We prevent this from ever happening by waterproofing your basement or encapsulating your crawl space.

If you are having water and moisture problems in your basement we install an interior drainage system. Any entering water is captured in the drainage channel where it flows to a sump pump that pumps it out and away from the home. A basement dehumidifier is installed for humidity and moisture control. Our system comes with a transferable lifetime dry-basement warranty....

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For new homes, vented crawl spaces should be illegal. That may seem harsh, considering the entrenchment of this common, code-compliant construction detail. I am on board for most local and common practices when they're done right, but it's tough denying that most building science research is condemning the classic vented crawl space in a humid climate. It's time for this building practice to be outlawed for new construction.

There are plenty of crawl spaces that seem to do fine, but even a dry crawl space can have negative effects on indoor air quality in the living spaces above. Most vented crawl spaces are not dry; they are building science disasters. Do you really think building a cave below your house is a good idea?

There is danger in breathing air that comes from open earth. RadonColorless, odorless, short-lived radioactive gas that can seep into homes and result in lung cancer risk. Radon and its decay products emit cancer-causing alpha, beta, and gamma...

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This rustic Craftsman style lodge is one of our best selling house plans and you can see why. The approximately 3,100 square foot home has three bedrooms, 2 and Ѕ baths and a two car garage with an option to finish the second floor. The second level of the home has an additional 732 square feet and, if completed, would offer a beautiful space for guests, older children or an in-law suite and includes a studio, bedroom, walk-in closet, bath and kitchen. This house design craves a beautiful setting in which to be built, such as a scenic mountain lot, serene lakefront property or golf course front property. Additionally, the home comes with the option of slab, crawl space or daylight basement; think of the possibilities if you were to add the basement option.
The use of rustic materials such as wooden columns and beams, stacked stone and gracefully arched windows in this home heightens the feeling of being “in tune with mother nature” and blends beautifully with its...

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Send us a description of the changes you want to make, using the form below. We will send you a confirmation email letting you know we are working on a quote.

Optional: For some changes, it may be helpful to print or download the floor plan drawings and mark them up. You may send marked-up drawings to us through the confirmation email we send to you, or by faxing the images and a copy of the email to us at 1-678-388-9651.

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2 Review Your No-Obligation Quote

One of our designers will review your request and provide a custom quote within 3 business days. The quote will include the price for the modifications, plus the time frame needed to complete the changes.

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3 Submit Payment & Hire A Designer

Once you approve the quote and submit payment, your designer will get to work!

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4 Receive Your...
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