12658 Wild Rose Ln. Nampa

Project Proposal: Drainage System Installation

The project involves the removal of the existing concrete slab at the rear of the house to facilitate a comprehensive foundation assessment. The demolition will be executed with precision to prevent unnecessary structural impact. Upon removal, a detailed inspection will be conducted to identify any underlying foundation damage, and necessary repairs will be completed prior to further site work. Additionally, seven structural support posts for the second-floor sunroom, currently embedded in the concrete being removed, will be replaced to ensure continued structural integrity. A new concrete landing will also be poured for the existing staircase leading up to the sunroom. Furthermore, the HVAC unit will be temporarily removed, and a new, properly reinforced concrete pad will be poured to support its reinstallation.

Site Grading and Drainage System Installation

To mitigate water intrusion and improve site drainage, the grading at the rear and west side of the property will be adjusted. A comprehensive drainage system will be installed in critical locations to optimize water redirection and prevent future foundation issues. A waterproof membrane will be applied to the foundation walls to enhance protection against moisture infiltration. A French drain system will be installed at the end of the former concrete patio and at the base of the backyard slope. This system will facilitate proper water runoff, preventing pooling near the foundation.

Drainage Run and Emitter System

A new drainage run will be excavated along the back of the home, extending to the west side and terminating at an emitter in the front-side yard. This system will feature a double-stack drainage design along the foundation to enhance water management. The drainage system will incorporate a 6-inch perforated PVC drain pipe, installed along the length of the trench. The trench will be backfilled with ASTM-approved drain rock and encased in high-quality filter fabric to prevent sediment infiltration and ensure long-term functionality. Water will be discharged at ground level through an emitter, directing flow safely away from the foundation.

Excavation and Material Handling (This will have to be hauled away)

All excavation work will be performed with precision to maintain the structural integrity of the surrounding area. Soil and debris from the excavation and demolition process will be promptly removed from the site and properly disposed of. This proposal ensures that the project is executed with engineering best practices, focusing on foundation stability, structural support replacement, efficient water management, and long-term site durability.