BASC Search | Building America Solution Center

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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Insulation Installation Achieves RESNET Grade 1

Guide

Guide describing RESNET Grade 1-level installation of insulation in walls, attics, and floors.

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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West Virginia Stormwater Management and Design Guidance Manual

Reference

Manual showing how to properly use grass swales to manage excess water runoff.

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

CAD File

Rigid Insulation Over Aggregate

Rigid Insulation Over Aggregate

CAD File

Insulating Garages in Multifamily Buildings

Guide

Guide describing how to properly insulate garages in multifamily buildings.

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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The seams of the rigid insulation are not taped and it will not provide a complete capillary break

The seams of the rigid insulation are not taped and it will not provide a complete capillary break

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There is 6 mil. polyethylene sheeting installed and sealed in the crawlspace

There is 6 mil. polyethylene sheeting installed and sealed in the crawlspace

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Lapped and taped polyethylene sheeting

Lapped and taped polyethylene sheeting

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Wrong – Driveway is not sloped away from the house

Wrong – Driveway is not sloped away from the house

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Wrong – No polyethylene sheeting vapor barrier is installed on the crawlspace floor

Wrong – No polyethylene sheeting vapor barrier is installed on the crawlspace floor

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Taping polyethylene sheeting at interior pier footings

Taping polyethylene sheeting at interior pier footings

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Right – Driveway is installed to slope water away from the house

Right – Driveway is installed to slope water away from the house

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Wrong – The final grade does not slope away from the house

Wrong – The final grade does not slope away from the house

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Right – The final grade slopes away from the house

Right – The final grade slopes away from the house

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Vertical Radon Ventilation Pipe

Guide

Guide describing how to install a radon-mitigating vertical ventilation pipe in new and existing homes with various types of house foundations.

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