Can You Pour Concrete Against Foundation? A Comprehensive Guide

Are you looking to build a patio or other outdoor structure? Concrete is a great option for its affordability and durability. But when it comes to pouring concrete against the foundation of a house, there are certain steps you need to take to ensure the safety of both structures. In this article, we'll discuss the importance of expansion strips, the proper way to pour concrete against a house, and other tips for a successful project. When pouring a concrete slab against an existing wall, it's important to install expansion strips between the patio and the wall.

This will protect both structures from the effects of temperature changes in the concrete and the ground beneath it. You can lay new concrete on top of old concrete, but any unsolved problems with the old concrete, such as cracks or frost, will be transferred to the new concrete if not fixed. Make sure that any wood in your house does not end up in contact with the backfill under the slab or bare concrete. If you have a brick exterior, you don't need an expansion space next to the house as the slab will expand away from it as needed.

However, if you have a wood exterior, you should place a strip of expansion material right against the house before pouring the concrete directly onto it. When pouring concrete against the foundation of a house, you should never pour it directly onto any coating as this can cause problems later on. Instead, install an expansion joint between the house and the slab. This can be done by introducing a short piece of reinforcing bar so that its top is level with the concrete.

After the surface is set, push the reinforcing bar further into the concrete so that it is well below the surface. It's also important to make sure that your concrete is at least two inches thick. If you're using Structural Insulated Panels (SIPS) for your project, consider stopping them one foot above ground level and using several layers of EPS below that on the ground and extending down so that it covers at least one foot of your concrete base.

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