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Insulation Standards Flashcards

7 cards from real BPI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Insulation Standards flashcards as text

  1. What is the key advantage of continuous exterior insulation over insulation installed only between framing members?

    Answer: It eliminates thermal bridging through structural framing

    Continuous exterior insulation wraps the entire wall surface including studs, eliminating the thermal bridging that reduces effective R-value in cavity-only insulation systems.

  2. According to BPI protocol, when should an energy auditor recommend replacing existing insulation rather than adding on top of it?

    Answer: When existing insulation is wet, moldy, pest-infested, or severely settled

    Existing insulation should be removed and replaced when it is compromised by moisture damage, mold, pest infestation, or significant settling that degrades its thermal performance.

  3. What does an 'R-value label' on insulation packaging indicate per FTC regulations?

    Answer: The thermal resistance of the insulation product as tested under standardized conditions

    The FTC R-value Rule requires insulation manufacturers to disclose the product's thermal resistance (R-value) on packaging, tested per ASTM standards under defined conditions.

  4. A crawlspace with vented foundation walls in Climate Zone 5 should be insulated according to BPI by placing insulation where?

    Answer: On the underside of the floor joists in the crawlspace

    In a vented crawlspace, BPI recommends insulating the underside of the floor joists (floor above) to maintain conditioned space boundaries, though encapsulated crawlspaces are often preferred.

  5. Which ASTM standard governs the test method for measuring thermal resistance (R-value) of insulation materials?

    Answer: ASTM C518 or ASTM C177

    ASTM C518 (heat flow meter) and ASTM C177 (guarded hot plate) are the primary standards for measuring steady-state thermal transmission properties of insulation.

  6. What is the recommended indoor relative humidity range to prevent condensation problems within wall insulation assemblies during winter?

    Answer: 30–50%

    Maintaining indoor relative humidity between 30–50% during heating season reduces the vapor pressure driving moisture into wall assemblies and helps prevent interstitial condensation.

  7. In a BPI energy audit report, which measure is used to quantify the cost-effectiveness of adding insulation to an attic?

    Answer: Simple payback period or return on investment (ROI)

    BPI auditors typically present simple payback period (cost divided by annual energy savings) or ROI to communicate the economic benefit of insulation upgrades to homeowners.