This Old House general contractor Tom Silva shows how to open up a wall for a large glass slider. (See below for a shopping list and tools.) SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse Shopping List for How to Install a Sliding Glass Door: - pressure-treated 2x4s [https://amzn.to/2KaRX26] - 2x4s [https://amzn.to/30Ra8Qk] - ⅝-inch-thick exterior-grade plywood [https://amzn.to/2WaTsVe]…