3302 56TH ST SW 2016-01-01 MF Import

� ��:� lossee. In a wet location, a 2 inch concrete "rat alab" laid oe the ground over the moisture barrier would eubatantially reduce moisture from the eoil. In locatioas vhere rgdon is preaent in'significant amounts in the soil,�a heated crawl epace may not be advieable. It is poseible that radon gas from the soil wo+sld be carried into the'living sp+�ces becauer. it cannot ,.1, vent to the outside. 4. INSTALLING SIIB-FLOOR SNSULATION ��"Insulatiaa can be supported in a number of vaye, including chicken wLre, � "Z-Wire", wood lath, and Tyvek. The support is actually etronger than x;. neceasary to support dry fiberglass batte. However, if the batta are •oaked by rain before floora are laid, the value of atrong support will be evident. The aupport ahould never droop because that will allov air to s� : flov between the insulation and the fYoor, reducing or eliminating ite }::�� effectiveneas. This hae been a, problem with some plastic aettinge. J. . In post-and-beam constructioa, the aupports need to be attached properly at the foundation vall ao that ineulation csn be extended all the waq to the rim. A reco�ended solution is to attach a nailer atrip to the foundation �or inlay it into the concrete forms before pouring) to give the aupport a eolid place to attach.) Usually, unfaced batte are used with one of the above supporte. To increase from R-19 insulation to R-30 requires an additional 3 inches of depth. in post-and-beam floor conetruction, one option is to increase the depth of the beama to 4 x 10. The unit coet for pieces of material will be more, but the 4 x 10's allow spans and spacing to be increased to reduce the total amount of material needed. The coats ahould balance out. The 4 x 10 depth allowa the full 9" needed for R-30 fiberglase insulation. 4-52 b....H..�w.w..� ... . ..,. . � . ._.:,,..a,,...._ . _..,