Carport Gap Connector: Weatherproof Seal for Joining Adjoining Sloped Roof Structures.

is looking for a way to keep water out of the space between two carports where both roofs slope inward. This is a common headache for homeowners with multiple outdoor structures, as standard flashing or simple gutters might not be up to the task or easy to install correctly in this specific "valley" setup.

Product Opportunity: A specially designed, flexible, and durable sealing kit to bridge and waterproof the gap between two inward-sloping carport roofs.

Product Suggestion: "Flexi-Valley Carport Seal Kit"

Description: A comprehensive kit made for DIY installation, designed to create a waterproof seal over the central gap formed by two adjacent carports with inward-sloping roofs. The main component is a wide, heavy-duty, UV-resistant EPDM (Ethylene Propylene Diene Monomer) or TPO (Thermoplastic Olefin) flexible membrane.

Kit Components & Features:

  1. Wide Flexible Membrane:
    • Material: High-grade EPDM or TPO rubber, known for its excellent weather resistance, UV stability, and long lifespan (typically 20+ years).
    • Width: Available in various widths (e.g., 18 inches / 45 cm, 24 inches / 60 cm) to effectively span the gap and allow for adequate overlap on both roof surfaces.
    • Length: Sold in standard roll lengths (e.g., 10 ft / 3m, 15 ft / 4.5m, 20 ft / 6m) to suit common carport dimensions.
  2. Fastening System:
    • Includes specialized termination bars (e.g., aluminum strips) and appropriate self-drilling, gasketed screws designed for securing the membrane edges to metal carport roofs without causing leaks.
    • Alternatively, or as an add-on, high-bond EPDM/TPO compatible seam tape and/or liquid adhesive/sealant for ensuring a watertight bond along the edges.
  3. Surface Preparation Supplies:
    • Cleaning wipes and/or primer to ensure proper adhesion of sealant or tape to the carport roof surfaces.
  4. Detailed Instructions:
    • Clear, step-by-step installation guide with illustrations, tailored for DIY users.

Expected Benefits for the User:

  • Effective Water Ingress Prevention: Reliably seals the gap, channeling rainwater away and preventing it from leaking into the space between the carports, thereby protecting stored items (vehicles, equipment) and the underlying ground.
  • Increased Usable Space: Transforms the previously wet and unusable area between the carports into a dry, sheltered space, enhancing its utility for storage, as a walkway, or for other activities.
  • Durable and Long-Lasting Solution: Offers a significantly more robust, weather-resistant, and permanent fix compared to temporary solutions like tarps, basic plastic sheeting, or improperly applied caulk.
  • Easy to Install: Designed for straightforward DIY installation with common household tools, saving on professional labor costs.
  • Aesthetically Pleasing: Provides a cleaner, more integrated, and professional look than ad-hoc, makeshift solutions. Can be offered in colors (e.g., black, grey) that blend with typical carport finishes.
  • Cost-Effective: A more affordable alternative to custom metal fabrication, re-roofing, or constructing a new single, wider roof structure.

Target Audience:

  • Homeowners with two or more adjacent carports, sheds, or similar outdoor structures where roofs create an inward-sloping valley.
  • Small businesses or agricultural operations with multiple open-sided shelters.
  • DIY home improvement enthusiasts looking for practical solutions to common property maintenance issues.

Origin Reddit Post

r/diy

What would be the best way to connect these two carports together from water getting in the middle?

Posted by u/Turbulent_Yak_533405/28/2025

Top Comments

u/Jorvall
Could probably make a gutter down the middle work. Run the water away from it.
u/--RedDawg--
Heavy plastic sheets folded into a U shape trough thay is outside the vertical supports but inside the metal sheets to catch the water coming off each roof, sloped to one side or the other. T
u/frix86
Due to both sloping in that direction, water is going to run that way no matter what you do. Maybe you can put a gutter between them with some flashing caulked to the roof to help the water
u/eerun165
Put another car port on top to span the downsloping edge of both of them. Really, there’s no nice way of stopping it here with this type of construction without effort, you’d need to span a
u/5WattBulb
How wide is the gap between them? I have a metal shed that's a similar design near to a wall and I attached a rain gutter to it. Bridges the gap and divers the water to a downspout on the end

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