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19 videos

  1. Ice Dam Heat Cables, Furnace Upkeep and Snow Blower Care

    Published: 8 Oct 2026

    A winter-weather episode of Ask This Old House covering ice dams, where an electrician installs a 60-foot electric heat cable with a temperature and moisture sensor on a roof, gutter and downspout.

    Call a pro?
    Permit or a pro may be required

  2. Insulating Basement Walls with 2 in. XPS Foam Board and Tape

    Published: 31 May 2026

    Josh shows how to insulate basement block or poured concrete walls with 2 in. Owens Corning FOAMULAR NGX XPS rigid foam board.

    Call a pro?
    DIY is fine

  3. Blocked Soffit Vents: How to Check and Fix Attic Ventilation

    Published: 3 May 2026

    Explains how a ridge-and-soffit attic ventilation system is supposed to work and why blocked soffit vents are the common failure.

    Call a pro?
    DIY is fine

  4. Attic Decking for Heavy Storage: Joists, Air Sealing and OSB

    Published: 2 May 2026

    Travis from Lowe's Home Improvement shows how to deck an attic floor for heavy storage.

    Call a pro?
    Permit or a pro may be required

  5. Installing Rafter Vents in an Attic Before Insulating for an Office

    Published: 27 Feb 2026

    The creator installs rafter vents between 16 in. on center rafters in an attic being turned into an office, keeping an air channel from the soffit vents to the ridge vent before adding blown-in…

    View project: Office Build
    Call a pro?
    DIY is fine

  6. Insulating a Shed Ceiling With Rigid Foam and Vented Rafter Bays

    Published: 3 Dec 2025

    Scott of Everyday Home Repairs insulates the ceiling of a 12x16 shed being converted to an office using 2 in. rigid foam board fixed to the underside of the rafters.

    Call a pro?
    DIY is fine

  7. Rim Joist Insulation: Batts, Foam Board or Two-Part Spray Foam

    Published: 7 Dec 2024

    Jeff compares three ways to insulate a basement rim joist in a 1974 home: batt insulation alone, rigid foam with spray foam and batts, and a two-part spray foam kit.

    Call a pro?
    DIY is fine

  8. Insulating an Old Basement: Slab, Walls and Rim Joist Moisture Control

    Published: 16 Nov 2024

    Explains how to insulate and air seal an old basement while controlling condensation: slab treatment with epoxy or a dimple mat, taped rigid foam or closed cell spray foam on walls, floating or…

  9. Insulating an Old Attic: Air Sealing Vented and Conditioned Roofs

    Published: 2 Nov 2024

    Explains how to insulate and air seal an existing attic without causing condensation and mold.

  10. Sealing a Vented Attic Ceiling With Siga Membrane, Not Drywall

    Published: 22 Mar 2024

    Matt Risinger and Steve Baczek stand in a house outside Boston and show how to complete the air barrier across the ceiling of a vented attic.

  11. Planning a Basement Renovation: Water, Permits and Layout

    Published: 31 Oct 2023

    A live show on planning a basement renovation, covering function, layout, permits and drawings, wiring, insulation, soundproofing and plumbing.

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    Permit or a pro may be required

  12. Blowing In Attic Insulation With an AttiCat: Seven Lessons Learned

    Published: 21 Mar 2023

    A couple insulated their attic with a rented AttiCat machine and expanding fiberglass blown-in insulation, and share seven lessons.

    Call a pro?
    DIY is fine

  13. Attic Air Sealing and Re-Insulation in a 1980s Texas House

    Published: 26 Jul 2022

    Matt Risinger and home performance contractor Quincy Bishop of True R Value re-insulate a vented Texas attic in a 1980s house by removing the old insulation, air sealing leaks, and blowing in new…

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    Permit or a pro may be required

  14. Basement Build: Foam Under the Slab, Link-Seal and Strapping

    Published: 24 Sep 2021

    Matt Risinger and builder Wade Paquin walk through three details for building a better basement: two inches of closed-cell spray foam under the slab and up the walls, Link-Seal gaskets to waterproof…

  15. Attic and Cathedral Ceiling Insulation: Baffles First, Then R38 Batts

    Published: 14 May 2021

    Andrew Phillips shows how to insulate an attic ceiling or cathedral ceiling with batt insulation.

    Call a pro?
    DIY is fine

  16. Turning an Old Joshua Tree Shed Into a Insulated Woodworking Shop

    Published: 23 Feb 2021

    Mike Montgomery starts converting an old barn-style shed on his Joshua Tree property into a woodworking workshop.

    View project: Shed to Workshop Conversion
    Call a pro?
    DIY is fine

  17. Blown-In Attic Insulation: Prep, Air Sealing and Machine Use

    Published: 28 Mar 2018

    Lowe's shows how to add blown-in fiberglass loose fill insulation over an existing layer in an attic.

    Call a pro?
    Permit or a pro may be required

  18. Insulating Basement Concrete Walls with Foam Board and a 1×3 Grid

    Published: 4 Nov 2014

    Tom Silva shows how to prepare bare concrete basement walls for wallboard.

  19. Attic Insulation: Cellulose, Fiberglass Batts and a Raised Platform

    Published: 30 Sep 2014

    This Old House general contractor Tom Silva adds insulation to an attic that had only about two inches of settled rock wool.