Insulation increases comfort and reduces utility bills. Foil faced insulation is the best type of insulation for retaining heat in the winter and keeping heat out in the summer. This insulation product is designed to slow heat transfer and enhance acoustical performance. It also works as a barrier for methane, radon, vapor, termites and other vermin. Foil faced insulation is designed for non-exposed applications only. At Lampert Lumber, we carry a variety of different types of insulation including thermal foil faced. Speak with a professional about the individual requirements of your space and together we will find an exceptional insulation solution for your project.
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Foil faced insulation is designed with one side of reflective foil in order to eliminate heat loss. Typically, the foil side is installed facing the warm air surface in order to reflect energy back toward the interior of the building or home. Depending on your geographical location, there may be different local practices or building codes that require certain standards. The foils used in foil faced insulation are combustible. Therefore, this type of insulation is designed for non-exposed applications only and it can be a serious fire hazard if used incorrectly.
Foil faced insulation is cost-effective and flexible. This type of insulation can be used in a variety of different residential and commercial applications. It drastically improves the thermal performance of walls, ceilings, attics and roofs. There are multiple thicknesses available and its light weight makes handling and installation simple.
At Lampert Lumber, we carry top-of-the-line building materials, including foil faced insulation. We have over 100 years of experience dealing with roofing and insulation products. We will listen to your individual needs and walk you through the selection process.
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I am in the process of remodeling my basement. I&#;m in climate zone 7.
A previous owner had insulated the concrete basement walls with 1.5&#; of foam with thin wood paneling attached directly on top. In some areas there was fiberglass insulation in a 3.5&#; cavity directly against the concrete. Totally inadequate and not up to code. The basement is relatively dry and it rarely gets very humid here. I have already removed everything down to the concrete.
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I&#;m planning on installing 1.5&#; of EPS foam followed by a 2×4 advanced framed wall filled with fiberglass batts. I believe the basement was unfinished when the house was built, so the ceiling has R-19 faced fiberglass batts currently. I am planning on removing it since the basement is now heated and reusing it in the 2×4 walls. I understand that the R value will be reduced to around 15 since it will not have the space of the 2×6 ceiling cavity. This will be covered in typical drywall.
I&#;ve chosen EPS since I have read studies that show XPS significantly degrades in its thermal properties over time (and costs over 2x as much) and polyiso is a poor insulator in cold temps.
Three questions:
1: Is it really that much of a problem to use foil faced EPS boards? Everything I have read on GBA blog posts and on buildingscience.com white papers specifically shows the use of UNfaced boards since you don&#;t want a vapor barrier between the concrete and the inside area. However, I have both read that a vapor retarder before the batts is likely okay, and I have also seen that the manufacturer installation documentation (R-Tech and Polyshield) both show the use of foil faced EPS in basement wall applications.
Home Depot and Lowes seem to only stock foil faced EPS. I can try sourcing unfaced EPS from another supplier, but I am in the mountains away from any large city so I imagine the cost would be quite high to get it here.
2: Should I be fine reusing the R-19 faced batts in the wall, and just slashing the facing to remove the vapor barrier?
3: Is there anything else about my plan that you would advise against, or anything that I otherwise got wrong?
New to GBA and thanks in advance!
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