Crawl Space Drying >> How To Fix Water Problems On A Concrete Crawl Spac

A choice of whether to insulate the basement is yours, unless you have an intentional heat supply. There are several reasons for and against constructing a conditioned basement space: People often want to use basements. Even if they are not finished space, people often use basements for laundry,
How To Fix Water Problems On A Concrete Crawl Spac projects, storage or other  uses. 

They really don't want the basement to be a very cold space in winter. If they do finish off the space later, How To Fix Water Problems On A Concrete Crawl Spac it will be easier if the basement is already insulated. It's easier to air  seal the foundation walls. Floors are usually far leakier than foundation walls, and are also harder to seal. 

There's no need to insulate HVAC ducts or pipes in a conditioned basement, which can  save money. How To Fix Water Problems On A Concrete Crawl Spac Warm basements are less likely to have condensation and related mold and mildew problems than cold basements. Insulating foundation walls has potential pitfalls. 

Exterior  insulation may provide pathways for insects, must be protected, and tied in somehow with the wall above. How To Fix Water Problems On A Concrete Crawl Spac Interior insulation cools foundation walls, and if drainage and  insulation details are not built carefully there is substantial risk of condensation and mold growth. Insulating walls often costs more than insulating the floor over a basement. 

Other issues to think carefully about when  planning foundation details include: Concrete movement and cracking can result in callbacks, air leaks and water entry in foundations. How To Fix Water Problems On A Concrete Crawl Spac EEBA includes a discussion of concrete movement and control joints—which can reduce or eliminate these problems—as well as other foundation issues. 

Moisture, drainage and capillary breaks—Foundations are built in the ground. Depending on where you build, the ground is either sometimes wet or always wet. How To Fix Water Problems On A Concrete Crawl Spac All foundations should be  built with good drainage and moisture protection. Insect entry—Termites and carpenter ants can tunnel through rigid foam insulation. 

If the foam insulation is between the ground and the wood frame of the  house, they can use it as a way to get to the wood without being seen. How To Fix Water Problems On A Concrete Crawl Spac For this reason some model codes have prohibited the use of foam insulation above grade in  termite-prone areas. 

While the Northeastern and mid-Atlantic states are not generally considered to be termite-prone, termite protection still warrants consideration. Termites don't eat foam  board, but they will eat wood, causing structural damage. How To Fix Water Problems On A Concrete Crawl Spac Carpenter ants don't eat either one, but they will nest in both and over long periods can cause structural damage. 

There may be ways to effectively block insect entry from  foam board to adjoining wood framing (or above grade foam sheathing); however, the details for such a system must be implemented very carefully. How To Fix Water Problems On A Concrete Crawl Spac The energy code (and common sense) requires  insulation in heated basements to the top of the foundation wall.

After all, most heat loss occurs where the  foundation wall is exposed above grade. How To Fix Water Problems On A Concrete Crawl Spac You can't cut exterior foam board off at grade, so it may be better to insulate conditioned basements on the inside of foundation walls than to attempt an  insect barrier between exterior foam and the wood framing. 

Alternative foundation systems—such as insulated concrete forms (ICFs) or precast concrete walls can speed up the construction  process (especially in the winter) and provide a pre-insulated, airtight assembly. How To Fix Water Problems On A Concrete Crawl Spac They can be very cost-effective,  when compared to a poured concrete wall with a built-up insulated stud wall. 

Crawlspaces—Historically, many building codes have required passive vents in exterior walls and  minimal vapor barrier protection for crawlspace floors. How To Fix Water Problems On A Concrete Crawl Spac While this strategy may have helped to reduce moisture loads at times, it also introduced moisture in the summer when out- door air is more humid than the  cool crawlspace. 

Building science has shown that ventilating crawlspaces often does more harm than good, and codes are starting to catch up with the more sensible approach of building a tight  crawlspace with good drainage and How To Fix Water Problems On A Concrete Crawl Spac vapor control. 

In fact, national model energy codes are beginning to include exceptions that allow for unvented crawlspaces that are either vented to the interior, How To Fix Water Problems On A Concrete Crawl Spac conditioned, or provide air to the  return side of a heat and/or air conditioning system (IRC R408.2). Basically a crawlspace should be built like a very short, conditioned basement (see Figure 6.9). 

There are three critical elements to consider: adequate footage  drainage, thorough vapor barrier installation, and insulated walls. The vapor barrier should be at least 6 mils thick, and all seams must be sealed with a good quality tape (like 3M contractor's tape or Tyvek sheathing tape) or How To Fix Water Problems On A Concrete Crawl Spac   acoustical sealant. 

It should be mechanically fastened to the exterior walls, and all penetrations (including piers) must be sealed. Like any basement, it's important to keep inside air away from the foundation wall to prevent  condensation. How To Fix Water Problems On A Concrete Crawl Spac All vertical and horizontal joints in the rigid insulation must be carefully sealed to prevent humid air from  reaching the cool foundation wall, where it can condense. 

TIP: Glass-faced gypsum board or cement "tile-backer” board is much less vulnerable to moisture than paper-faced drywall. It can be finished with the veneer (skim-coat) plaster. How To Fix Water Problems On A Concrete Crawl Spac Use vinyl or fiber-cement  components for baseboard trim. One inch of rigid foam insulation under the slab will reduce the potential for condensation in the summer. 

Even if the foundation walls do not enclose  conditioned space, condensation on the slab can contribute to moisture problems in the home. How To Fix Water Problems On A Concrete Crawl Spac If conditioned space is adjacent to an unconditioned space (e.g., in a partially finished basement), then the wall between these two spaces must be insulated  according to results of the compliance analysis. 

To avoid moisture problems in crawlspaces, install the same drainage and capillary breaks as for a full basement. How To Fix Water Problems On A Concrete Crawl Spac What is the best  way to clean sheetrock/plaster walls/crawlspaces after a flood? Remove all water-soaked sheetrock and insulation between wall joists to allow the wall cavity areas to dry. 

For plaster walls, openings can be made in the top and bottom of the walls to allow water to drain and air to circulate. How To Fix Water Problems On A Concrete Crawl Spac If power is available, use fans to circulate the  air and dehumidifiers to assist. Hiring a professional drying service may be necessary. Crawlspaces beneath the building may be difficult to clean and dry out. 

Bacterial growth can be a  significant concern in these areas. Crawlspaces are often small spaces to work and could be considered a confined space.  How To Fix Water Problems On A Concrete Crawl Spac Without proper ventilation and safety precautions do not enter these areas. Seek professional assistance to evaluate and clean these areas.

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