# Horizontal, inner furring strips

### Problem

The horizontal, inner furring strip (for vertical paneling) does not account for window rough openings. As a result, the material list for inner furring strips is incorrect.

This issue applies only to horizontal furring strips (for vertical paneling); there is no such problem with horizontal paneling.

<figure><img src="/files/tenQRNmNyKXcdo9Vxw5D" alt="" width="563"><figcaption><p>Omission of the window opening in the visualization and summary</p></figcaption></figure>

### Solutions

1. Adjust the quantity of materials.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.diysauna.app/be-aware/horizontal-inner-furring-strips.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.