DIY Butterfly Roof Carport Plans: 13x20 Modern Single Car Wood PDF

DIY butterfly roof carport plans in a 29-page PDF. Build a 13x20 modern single car wood carport with a V-shaped metal roof, center valley and rain chain, using step-by-step drawings.

- Product: Monarch butterfly roof single carport plans, 13' x 20' frame
- Format: Digital PDF download
- Pages: 29
- Paper Size: US Letter
- Units: Imperial (feet and inches), metric reference values in the cut list
- Dimensions: Frame 13' 0" x 20' 0", roof 14' 9-1/2" x 20' 1-1/2", front eave corners about 12' 7-3/8" above the piers
- Parking: One car or SUV, 12' 3-1/2" clear between posts, 20' deep, driven in at the front
- Entry Clearance: 8' 2-9/16" under the front cross beam, 7' 4-15/16" under the back one
- Roof: Butterfly roof, two 3/12 wings falling to a center valley, exposed-fastener metal panels on 2x4 purlins
- Drainage: Whole frame falls 1/2" per foot to the back, W-valley flashing and a rain chain at the valley outlet
- Frame: 8 pressure-treated 6x6 posts on concrete piers, 2x12 cross beams, doubled 2x10 side and valley beams, 4x6 and 4x4 knee braces
- Style: Modern, mid-century inspired freestanding post and beam carport
- Skill Level: Intermediate, 2 people, about 4 weekends
- Includes: 12 illustrated steps, shopping list, master cut list, cut diagrams, rafter and barge templates, brace, valley and eave details, framing plan, elevations, finished renderings
- Best For: Homeowners and DIY builders who want a modern covered parking spot for one car
- Delivery: Instant PDF download after purchase, no physical item shipped

## What's Included in These Butterfly Roof Carport Plans

These wood carport plans take you from layout and concrete footings to the metal roof and rain chain. New parts in each step are shown in color, so you always know what goes on next.

- Overview and specifications page with all key dimensions and clearances
- Front elevation, side elevation, roof plan and a top-view framing plan
- Exploded view of the main parts: posts, cross beams, side beams, valley beam, knee braces, rafters, purlins, V-barge boards and metal roof
- Before You Start page: permits, tools, lumber sizes, fasteners and safety
- Shopping list for lumber, foundation, hardware, metal roofing and finish materials
- Master cut list: 102 cut pieces from 82 standard boards, with imperial and metric lengths
- Cut diagrams that show which board each part comes from
- Rafter and V-barge templates, plus brace, valley and eave details
- A fall table for the post heights, since the frame slopes 10" from front to back
- 12 step-by-step construction pages, each ending with the cut list for that step
- Finishing and care notes, common questions and 6 finished 3D renderings

## Modern Butterfly Roof Design with a Rain Chain Valley

The Monarch is a modern single carport with a butterfly roof: two 3/12 wings slope down from the high side eaves into a center valley, forming an inverted V. The whole frame falls 1/2" per foot toward the back, so rain runs along the valley and drops down a rain chain at the valley outlet.

- Each post row has a 2x12 cross beam on both faces of the posts and a 6x6 valley block at the center
- A doubled 2x10 valley beam carries the inner ends of the rafters, which lap in pairs over it
- Black fascia and V-barge boards outline the butterfly shape against cedar-tone posts and beams
- Footprint: 260 sq ft frame, about 307 sq ft of roof surface
- Foundation: 8 concrete piers, 12" diameter on 24" bell footings, 42" deep or below your frost line
- Design basis: conventional post-and-beam practice for ground snow up to about 20 psf and ordinary inland wind, not an engineered design

## File Format, Paper Size and Units

The plan is a single PDF formatted for US Letter paper. Print it at home or a print shop, or open it on a tablet or laptop at the build site. All dimensions are in feet and inches to 1/16", and the cut list adds metric values for reference.

## Who This 13x20 Carport Plan Is For

This plan suits DIY builders with basic framing experience who want a modern carport with a striking roofline. It is an intermediate two-person build that takes about four weekends, and every cut, bolt and connector is listed in the plan.

## How to Use Your Carport Blueprint PDF

1. Buy the plan and complete checkout.
2. Download the PDF from the link on the order confirmation page or in your email.
3. Print it on US Letter paper or open it on your device.
4. Show the plan to your building department, then follow the shopping list, fall table, cut list and 12 steps to build.

Carport searches peak in spring, so the winter months are a good time to get permits and order lumber and metal panels.

## Digital Product Note

This is a digital download. No physical item is shipped. Your PDF is available right after purchase.

## License and Terms of Use

This plan is for personal use. You may build as many carports as you like for your own property. You may not resell, share or publish the PDF or its drawings. Always check local building codes, permit requirements and setbacks before you build.

## Frequently Asked Questions

### What is the point of a butterfly roof on a carport?

A butterfly roof gives a carport a modern inverted V shape and sends all the rain to one center valley, where this plan collects it with a rain chain. The high outer eaves also leave an open, airy feel around the car.

### What are the disadvantages of a butterfly roof?

The main drawback of a butterfly roof is that the valley must be kept clear of leaves and needles, and snow can drift into it. This plan uses W-valley flashing and a 1/2" per foot fall, and it asks you to clear the valley twice a year.

### Can I use shingles on a butterfly roof carport?

No, shingles need a steeper slope and do not work in a valley this shallow, so this butterfly roof carport uses metal panels.

### Can the rain chain be at the front of the carport?

Yes, reverse the post table so the longest posts are at the back, then put the valley spout and rain chain at the front.

### How do I download the PDF after purchase?

After checkout, a download link for the PDF appears on the order confirmation page and in your confirmation email. Click it to save the carport plans to your computer, tablet or phone.

Browse more DIY building plans in the KRMPLANS store, including other single, double and triple carports. If you have a question about this butterfly roof carport plan, send us a message and we will be glad to help.