Crawl Space Drying >> How To Remove A Moldy Smell From A Crawl Space


In an unconditioned basement, you must: Insulate the floor above the basement. The required R-value depends on the results of your compliance analysis. Insulate the stairwell between the basement and conditioned first floor. Insulate heating pipes and air ducts in the basement. How To Remove A Moldy Smell From A Crawl Space Seal the ducts in the basement. 

Seal air leaks in the floor system between the basement and the first floor, such as wiring and plumbing penetrations, and weatherstripping on the basement door. Include the basement door in your calculations. How To Remove A Moldy Smell From A Crawl Space Slab perimeter (edge) insulation must be installed where the slab is part of the conditioned space of the house. 

This includes a slab-on-grade house or addition, the walkout portion of a heated basement, or a breezeway that shares a slab with the garage. How To Remove A Moldy Smell From A Crawl Space Slab perimeters must be insulated where the top edge of the slab is above grade, or less than one foot below grade (see Figure 6.6). The R-value to use depends on the results of your compliance analysis. 

If the slab edge insulation is on the exterior, the insulation must be protected with a rigid, opaque and weather-resistant barrier that extends at least 6" below grade (ECCCNYS 102.4.1). How To Remove A Moldy Smell From A Crawl Space Slab perimeter (edge) insulation must be installed where the slab is part of the conditioned space of the house. 

This includes a slab-on-grade house or addition, the walkout portion of a heated basement, or a breezeway that shares a slab with the garage. How To Remove A Moldy Smell From A Crawl Space Slab perimeters must be insulated where the top edge of the slab is above grade, or less than one foot below grade (see Figure 6.6). The R-value to use depends on the results of your compliance analysis. 

If the slab edge insulation is on the exterior, the insulation must be protected with a rigid, opaque and weather-resistant barrier that extends at least 6" below grade (ECCCNYS 102.4.1). How To Remove A Moldy Smell From A Crawl Space Slab perimeter insulation must run all the way to the top of the slab. 

It may go down, or down and across, for a total of 24" (climates less than 6000 HDD) or a total of 48" (climates more than 6000 HDD). If you are using the ECCCNYS Chapter 6 tables, 48" slab insulation is required in climates over 5,500 HDD according to table 602.1. How To Remove A Moldy Smell From A Crawl Space See Figures 6.7-6.8 for examples. 

Note: "Heating Degree Days"(HDD) are a measure of how severe the heating season is How To Remove A Moldy Smell From A Crawl Space. With the exception of the southeast corner of the state (Orange, Putnam, Rockland and Westchester Counties, New York City and Long Island), all of New York has a climate of greater than 6000 HDD. 

Crawlspace The floor over a vented crawlspace construction must be insulated to the same R-value as a floor over an unconditioned basement, according to the compliance analysis. How To Remove A Moldy Smell From A Crawl Space The walls of an unvented crawlspace must be insulated according to the R-value shown in the compliance analysis for "crawlspace walls." 

Slab perimeter insulation must run all the way to the top of the slab. It may go down, or down and across, for a total of 24" (climates less than 6000 HDD) or a total of 48" (climates more than 6000 HDD). How To Remove A Moldy Smell From A Crawl Space If you are using the ECCCNYS Chapter 6 tables, 48" slab insulation is required in climates over 5,500 HDD according to table 602.1. 

See Figures 6.7-6.8 for examples. Note: "Heating Degree Days"(HDD) are a measure of how severe the heating season is. How To Remove A Moldy Smell From A Crawl Space With the exception of the southeast corner of the state (Orange, Putnam, Rockland and Westchester Counties, New York City and Long Island), all of New York has a climate of greater than 6000 HDD. 

Crawlspace The floor over a vented crawlspace construction must be insulated to the same R-value as a floor over an unconditioned basement, according to the compliance analysis. How To Remove A Moldy Smell From A Crawl Space The walls of an unvented crawlspace must be insulated according to the R-value shown in the compliance analysis for "crawlspace walls." 

ENERGY STAR To achieve the ENERGY STAR rating, you may need to put slightly more insulation in your basement walls (or the floor over the basement) than you would to meet the code. How To Remove A Moldy Smell From A Crawl Space Other recommendations: Install at least 4" of uniform sized, washed stone underneath the slab floor. This acts as a capillary break to help prevent absorption of ground moisture. 

It also makes it easy to add a sub-slab ventilation system for radon mitigation, if radon is found after construction (see page 116). Insulate basement slabs, even in unheated basements. How To Remove A Moldy Smell From A Crawl Space 1" of rigid polystyrene foam under the slab will keep it warmer in summer and reduce the chance of condensation which can wet the slab and lead to mold and mildew. 

This will also improve comfort and reduce moisture problems if the basement is finished off later. Do not install carpeting on below-grade slab floors unless the slab is insulated under its entire area, and the foundation is well drained. How To Remove A Moldy Smell From A Crawl Space Moisture from condensation on an uninsulated slab, or drawn up by capillary action can lead to hidden mold and mildew problems in carpets. 

Always insulate under the entire surface of radiant heated slabs, even though the code does not require it. How To Remove A Moldy Smell From A Crawl Space Most radiant equipment manufacturers specify insulation under the slab; if you are heating the slab, the insulation will reduce heat loss and improve comfort. 

Because of the high temperature of radiant heated slabs, a minimum of R-15 rigid insulation is suggested even though manufacturers may recommend less. Try to avoid crawlspaces. How To Remove A Moldy Smell From A Crawl Space Where you do build over a crawlspace, be certain that the vapor retarder on the crawlspace floor is completely sealed at all seams and penetrations, and sealed to the wall. : 

The stone surrounding the perimeter drain, under the slab and/or under footing must be uniform in size and washed (with no fine grains), to prevent settling or undermining. How To Remove A Moldy Smell From A Crawl Space TIP: 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 Remove A Moldy Smell From A Crawl Space All vertical and horizontal joints in the 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 Remove A Moldy Smell From A Crawl Space Use vinyl or fiber-cement components for baseboard trim.

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