We use the latest software and state of the art equipment to fabricate duct and fittings. This allows us to provide incredibly short lead-times and competitive pricing, while maintaining the highest level of quality.

Straight duct is fabricated in numerous configurations. Upon request, sealant can be applied inside of longitudinal seams. All duct is shipped unassembled unless assembly is requested. Cleats has two state of the art coil lines that fabricate straight duct with the following options:

Material Thickness Coating Length Seam Connection
Galvanized 26 - 18 ga G-90 4',5' Snaplock or Pittsburgh TDF - S D - Raw
Paint Grip 26 - 18 ga A-60 5' Snaplock or Pittsburgh TDF - S D - Raw
PVC 24 - 18 ga 4X4 - 4x1 5' Snaplock or Pittsburgh TDF - S D - Raw
Aluminum .032 - 0.50 3003 H-14 5' Snaplock or Pittsburgh TDF - S D - Raw
Stainless Steel 24 -20 ga 304 - 316 5' Snaplock or Pittsburgh TDF - S D - Raw

TDF Flanged Connection

Transverse Duct Flange is a 4 bolt duct connection system that eliminates time and waste. Rather than using separate connectors to assemble your system, TDF® flanges are rollformed onto duct during the manufacturing process. This connection minimizes leakage and installation costs. All necessary hardware will be delivered with your order to ensure that you have everything you need to hang your ductwork.

Slip & Drive Connection

Cleats manufactures all slip and drive connectors you need to meet your specifications. Connectors can be shipped cut-to-length at your request to minimize field assembly time and reduce material waste costs.

Seams & Sealant

Rectangular duct is fabricated using Snaplock or Pittsburgh lock longitudinal seams. Upon request, sealant can be applied inside of the lock seam. Our sealant is a synthetic polymer-based, non-oxidizing, non-drying sealant that is applied to duct joints at the roll-forming line.

Duct Liner

Cleats stocks a large amount of duct liner. You may specify thickness, density, and material to meet your specifications. Anything from 1/2" up to 2" thickness is available upon your request. Our liner is applied with 100% adhesive coverage and both of our coil lines use weld pins for the most secure method of fastening.

Internal and External Reinforcements

We will reinforce duct with internal tie rods or external angle iron in accordance with SMACNA standards or per your specifications.


Cleats will ship ductwork with any of the above options to your jobsite knocked down. Upon request, we will assemble your ductwork prior to shipment for an additional charge. This greatly reduces field labor time and helps minimize and control your costs in a competitive marketplace.

Plastic Wrap

When required, all duct openings and pallets of material will be protected with self-adhesive, puncture resistant plastic wrap to prevent the intrusion of contaminates.

SMACNA Standards

Cleats will fabricate all duct and fittings to meet or exceed SMACNA standards.

Union Workforce

We are proud to be a union shop in the city of Chicago! All duct will be shipped with Yellow Union labels.