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Crawl space drainage: crawl space below grade

Crawl space drainage: crawl space below grade

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Vented crawl space with concrete walls and insulated ceiling

Vented crawl space with concrete walls and insulated ceiling

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Concrete crawl space wall with interior spray foam insulation

Concrete crawl space wall with interior spray foam insulation

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Wrong – Polyethylene sheeting does not completely cover the aggregate and the footing

Wrong – Polyethylene sheeting does not completely cover the aggregate and the footing

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Drainage and waterproofing system components in a basement, single perimeter drain system, footing detail

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Right - The concrete basement wall is insulated on the interior with rigid foam; the footing detail is shown.

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Right - This concrete basement wall is insulated on the interior with rigid insulation; sill details are shown.

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Right - This concrete basement wall is insulated on the interior with spray foam insulation; sill detail are shown.

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Crawl space drainage: crawl space below grade with dual drains

Crawl space drainage: crawl space below grade with dual drains

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Crawl space interior insulation with EPS or XPS semi-permeable insulation on inside wall

Crawl space interior insulation with EPS or XPS semi-permeable insulation on inside wall

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Unvented crawl space with interior insulation - designed for termite resistance in heavily infested areas

Unvented crawl space with interior insulation - designed for termite resistance in heavily infested areas

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Back to Basics: Termites and Building Construction

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Video presentation from PMP TV covering different building strategies as they relate to different slab and foundation types and building materials to keep out termites.

Right – Polyethylene sheeting completely covers the aggregate and the footing with no tears or open seams

Right – Polyethylene sheeting completely covers the aggregate and the footing with no tears or open seams

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Right - Poured concrete basement wall showing exterior insulation and sill detail; above-grade wall has sheathing to the inside of the rigid foam.

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Right - The concrete masonry unit (CMU) basement wall has exterior insulation; the footing details include interior and exterior footing drain pipe.

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Right - Poured concrete basement wall showing exterior insulation and sill detail; above-grade wall has sheathing to the outside of the rigid foam.

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Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas

Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas

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Wrong - Polyethylene sheeting should be lapped up sides of walls and pillars and taped

Wrong - Polyethylene sheeting should be lapped up sides of walls and pillars and taped

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Right - This rigid insulation is correctly installed in a level layer over aggregate; the seams will be taped

Right - This rigid insulation is correctly installed in a level layer over aggregate; the seams will be taped

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Right - Concrete masonry unit (CMU) basement wall showing exterior insulation and sill detail; above-grade wall has sheathing to the inside of the rigid foam.

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Wrong – Polyethylene sheeting does not extend beyond edge of aggregate to separate the footer from the stem wall which will be poured next

Wrong – Polyethylene sheeting does not extend beyond edge of aggregate to separate the footer from the stem wall which will be poured next

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Poor drainage conditions can enable water to pool around the home.

Poor drainage conditions can enable water to pool around the home.

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Radon Mitigation in New Construction

Video

Video describing radon precautions taken for a construction project in a high-risk radon area in Alaska.

Right - Potential locations for crawlspace insulation: vapor sheeting should always cover the floor with insulation (a) outside walls, (b) inside walls, (c) both sides of walls, (d) sandwiched inside walls, or (e) under the first floor.

Right - Potential locations for crawlspace insulation: vapor sheeting should always cover the floor with insulation (a) outside walls, (b) inside walls, (c) both sides of walls, (d) sandwiched inside walls, or (e) under the first floor.

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Polyethylene Over Aggregate

Polyethylene Over Aggregate

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Rigid Insulation Over Aggregate

Rigid Insulation Over Aggregate

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Foil Bubble Pack: Subslab Insulation?

Reference

Article describing the effective R-values of various subslab insulation products, including foil bubble pack.

Insulating Crawl Space Floors in Existing Homes

Guide

Guide describing how to upgrade a crawlspace floor in an existing home by adding insulation.

There is no polyethylene sheeting installed in the crawlspace

There is no polyethylene sheeting installed in the crawlspace

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Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors

Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors

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