![Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam](https://m.media-amazon.com/images/I/41srDZgZznL.jpg)
Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam
![Gibraltar Building Products 5-1/2 in. x 7-1/2 in. Foam Vent Plug (2-Pack) DVBPSM-EA - The Home Depot Gibraltar Building Products 5-1/2 in. x 7-1/2 in. Foam Vent Plug (2-Pack) DVBPSM-EA - The Home Depot](https://images.thdstatic.com/productImages/943954c1-ffb2-475c-8d5f-6bd18dbadf45/svn/gibraltar-building-products-foam-temporary-ventilation-dvbpsm-ea-64_145.jpg)
Gibraltar Building Products 5-1/2 in. x 7-1/2 in. Foam Vent Plug (2-Pack) DVBPSM-EA - The Home Depot
![Closing Crawl Space Vents in the Winter - Good or Bad Idea? | News and Events for Basement Systems, Inc. Closing Crawl Space Vents in the Winter - Good or Bad Idea? | News and Events for Basement Systems, Inc.](https://cdn.treehouseinternetgroup.com/cms_images/215/crawlspace-vent-cover-winter.jpg)
Closing Crawl Space Vents in the Winter - Good or Bad Idea? | News and Events for Basement Systems, Inc.
![Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam](https://m.media-amazon.com/images/I/41PIPksHg9L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam
![Gibraltar Building Products 5.5-in x 15.5-in Polystyrene Foundation Vent Plug in the Foundation Vent Plugs department at Lowes.com Gibraltar Building Products 5.5-in x 15.5-in Polystyrene Foundation Vent Plug in the Foundation Vent Plugs department at Lowes.com](https://mobileimages.lowes.com/productimages/d00e139e-e996-4b7c-a11a-94dff69ef027/00402375.jpg?size=pdhism)
Gibraltar Building Products 5.5-in x 15.5-in Polystyrene Foundation Vent Plug in the Foundation Vent Plugs department at Lowes.com
![Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam Amazon.com: Pre-Cut Foam Block | 8.25” X 16.25” Width X 1” Thick | Crawlspace Vent Block, Standard Vent Size | Arts & Crafts Foam | Polyethylene Foam Sheet | Insert Packing Foam](https://m.media-amazon.com/images/I/41srDZgZznL._AC_UF894,1000_QL80_.jpg)