Crawlspace Encapsulation with Venting Channels and Insecticide Foam

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Crawlspaces in homes are porous, leading to inadequate sealing against moisture, heat loss, and insect infestation, while also failing to effectively vent gases like radon.

Innovation Solution

An insulated foundation and subflooring structure incorporating foamed polymer insulating joist plugs and panels with integrated insecticides, such as boron-containing compounds, along with a polymeric membrane for waterproofing and venting channels to address moisture, heat, and insect issues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If crawlspaces are left porous and unsealed, then ventilation is maintained, but moisture sealing and heat insulation are inadequate

Engineering Contradiction:

Improvemoisture sealingVSAvoidencapsulation system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The encapsulation system is divided into distinct functional components: polymeric membrane for moisture sealing, insulating panels for thermal insulation, and venting channels for gas ventilation. Each component addresses a specific requirement, allowing the system to achieve reliable moisture sealing while maintaining manageable complexity through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The insulating panels serve multiple functions simultaneously: they provide thermal insulation, incorporate venting channels for gas ventilation, and work in conjunction with the polymeric membrane for moisture sealing. This multi-functionality reduces the need for separate components, managing system complexity while achieving comprehensive protection.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of energy

If insulating materials are added to prevent heat loss, then thermal insulation improves, but insect protection is not provided

Engineering Contradiction:

Improveheat lossVSAvoidinsect infestation

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

The system combines thermal insulation and insect protection into a unified encapsulation approach. The polymeric membrane provides both moisture sealing and acts as a barrier to insects, while insulating panels are integrated with the membrane system. This merging of functions ensures heat loss prevention while simultaneously addressing insect infestation without requiring separate treatment systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The polymeric membrane and insulating panels form a composite barrier system that integrates multiple protective properties. The combination of materials provides thermal insulation, moisture sealing, and insect resistance in a unified structure, addressing both heat loss and insect infestation through material composition rather than separate measures.

Inventive Principle:

Principle #40Composite materials

3Reliability

If polymeric membrane is used for waterproofing, then moisture sealing improves, but gas venting capability is reduced

Engineering Contradiction:

ImprovewaterproofingVSAvoidgas accumulation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The insulating panels incorporate localized venting channels at specific positions within the encapsulation system. These channels provide targeted gas ventilation pathways while the rest of the polymeric membrane maintains its waterproofing function. This local quality approach allows the membrane to be impermeable to moisture while creating specific zones for gas venting.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The venting channels in the insulating panels act as intermediary pathways that allow gas to pass through the encapsulation system. These channels provide a controlled mediation between the waterproofing requirement of the polymeric membrane and the need for gas venting, enabling selective permeability for gases while maintaining moisture sealing.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution provides effective sealing against moisture and insects, reduces heat loss and gain, and allows for gas venting, creating a more stable and safe crawlspace environment.

Implementation Method 1

insulating joist plug compressibly fit between the floor joists... insulating panels fastened to a portion of the foundation wall... R value from about 10 to about 36

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 2

polymeric membrane that overlaps a portion of the insulating panels and covers the ground adjacent the foundation wall. The polymeric membrane is preferably waterproof and/or resistant to moisture and/or other vapors

Methodology Applied

Scientific EffectMoisture resistance: Hydrophobe

Implementation Method 3

insulating joist plug is made of a foam polymer having an insecticide dispersed within the foamed polymer... containing a boron-containing compound... disodium octaborate tetrahydrate

Methodology Applied

Scientific EffectInsecticide toxicity: Preservative

Data Source

PatentUS8635816B2Crawlspace encapsulation system

Publication Date: 2014.01.28 NISUS CORP

AI summary

A crawlspace encapsulation system that enables sealing and insulating of the crawlspace while allowing for the venting of gases trapped between the ground and the sealing and insulating system. The crawlspace encapsulation system includes an insulation joist plug, one or more insulation panels, and a polymeric membrane.