Tent Terminology
Explained

The highest-quality canvas construction available. In Army Duck weave, both the crosswise and lengthwise threads are made by twisting two individual threads together into one — meaning every thread in the fabric is a doubled thread. This produces a denser, stronger fabric with greater abrasion resistance and longevity than single-fill or dual-fill alternatives of the same weight.

A canvas construction where only the crosswise threads are doubled (two threads twisted together to form one). The lengthwise threads remain single. Dual fill offers an intermediate level of durability — better than single fill, not as strong as Army Duck. It is a mid-grade construction used in many mid-price-point tents.

The basic canvas weave where all threads — both crosswise and lengthwise — are single (not doubled). Single fill is the lowest-tier weave construction. An entry-level wall tent at a budget price point is typically single fill.

Expressed in ounces per square yard (oz/sq yd). Common wall tent canvas weights are 10.10 oz and 12.63 oz. Heavier canvas is not inherently better — it is heavier, which matters for pack-in camps, and it tends to be more abrasion-resistant at the same weave grade. The weave type and treatment determine quality; weight is a secondary consideration.

A proprietary water and mildew treatment applied to cotton duck canvas during the manufacturing process. One of three common treatment grades (alongside Marine Grade and Paraffin Finish). Sunforger-treated canvas will not shrink significantly when wet, resists mildew under normal storage conditions, and has UV inhibitors integrated into the fiber. CTC uses Sunforger as our standard canvas treatment.

A water and mildew treatment for canvas tents comparable to Sunforger. "Boat shrunk" refers to the process of pre-shrinking the canvas during treatment. Canvas treated to marine grade standards will not shrink upon first wetting and resists mildew. Often marketed with different brand names by different manufacturers.

A heavy canvas treatment that provides water, mildew, and fire resistance simultaneously by impregnating the canvas with paraffin wax. Paraffin finish is effective but adds significant weight to the finished tent — more so than standard water/mildew treatments. It is one of the few treatments that combines all three protective functions in a single application.

A separate treatment from water/mildew protection. Canvas treated to CPAI-84 standard will not readily catch or spread fire — it will only burn when a continuous flame source is directly applied. When the flame is removed, fire-resistant canvas will stop burning. Untreated canvas, by contrast, will ignite and continue burning.

Cotton duck canvas in its natural state, without water, mildew, or fire treatment. Untreated canvas is naturally somewhat water-resistant due to the tight weave, but will shrink significantly (10–15%) upon first wetting, and will mildew rapidly if stored or used damp.

The point where the tent roof meets the side wall, typically with a 2–4 inch overhang. The eave creates a small roof extension over the wall, which helps shed rain away from the wall seam and keeps weather off the sod cloth. On higher-end tents, the eave overhang is reinforced with additional canvas layers at the seam point.

Sewn openings at the ends of the tent eaves that allow connection to an external frame system, porch frame, or cook shack frame. Eave socks are a feature used when attaching extensions to a tent — the extension frame pipes slip through the eave socks to create a continuous roof line between tent and extension.

A strip of material (typically 9–10 inches wide, usually vinyl) sewn to the bottom of all tent walls, running around the entire tent perimeter. The sod cloth lies on the ground and acts as an air seal between the tent base and the ground. It prevents drafts, keeps insects and small animals out, and keeps the interior cleaner since vinyl doesn't absorb ground moisture.

A reinforced opening in the tent roof, typically at the front-side corner, designed to pass a stovepipe through to the outside. Stove jacks are standard on all CTC wall tents. The opening is lined with a heat-resistant material and sized for standard stovepipe diameters. The fly, if used, has a corresponding cutout over the stove jack position.

Sewn-in metal D-shaped attachment rings running around the perimeter of the tent base. D-rings are the primary attachment point for the removable vinyl floor system — the floor grommet tabs clip to the D-rings, pulling the floor tight around the perimeter. They can also be used to stake the tent body to the ground in high-wind situations.

The interior height at the peak of the tent's roof ridge — the tallest point inside the tent. Ridge height is determined by the frame, not just the tent body. CTC standard tents range from 7'10" (10×12) to 10'3" (18×30). Ridge height affects usable standing area — the taller the ridge and the wider the tent, the more floor space where you can stand comfortably upright.

A historically-styled canvas tent designed to replicate the appearance of shelters from the Civil War, Revolutionary War, or fur trade era. Reenactor tents intentionally omit modern features — no zippers, no nylon hardware, no synthetic materials. All closures are traditional lacing, rope, or button systems. Primarily used for historical reenactments, living history events, and period demonstrations.

An extension of the tent roof only. An awning has no side walls and no front enclosure — it provides overhead shade and rain protection for the area directly in front of the tent door, but is open on all sides. Awnings can be sewn permanently to the tent or added as an extension with an 8–12 inch roof overlap. Best used in fair-weather camps where shade is more important than weather protection.

An extension that adds both a roof and side walls to the front of the tent, with the front remaining open. A porch provides significantly better weather protection than an awning — you get a covered area that's shielded from wind and rain on three sides. Ideal for boot removal, gear staging, and keeping a work area dry without it being inside the main tent body. Porches can be sewn to the tent or attached as extensions with an 8–12 inch overlap.

A fully enclosed extension of the tent with its own roof, walls, and a door in the front. The cook shack creates a completely separate room attached to the main tent body — used for cooking, food storage, and dining in a space isolated from the sleeping area. Can be sewn permanently to the tent or added as a detachable extension with 8–12 inch overlap sealing.

A frame pipe end that has been necked down (swaged/swedged) to a smaller diameter, allowing it to slide directly into the end of another frame pipe or coupler fitting. Swedging eliminates the need for separate sleeve connectors in many joint configurations. CTC internal frames use a combination of swedged pipe ends and coupler fittings depending on joint location.

Cast or machined metal fittings that join frame tube sections at angles — typically at ridge-to-upright junctions and wall-to-floor connections. Coupler weight varies by tent size and configuration. CTC couplers are designed specifically for 1⅜" steel tubing and are sold as a matched set for each tent size.

A freestanding frame system that assembles inside the tent body and pushes outward against the canvas to tension the walls and roof. Internal frames create a more uniform wall tension and generally plumb walls compared to external pole systems. CTC uses 1⅜" 16-gauge steel tubing with swedge-fit couplers. The frame breaks down into sections for transport.

A removable vinyl floor panel that attaches to the tent's perimeter D-rings after the tent is set up and the frame is in place. The D-ring system is our standard floor configuration. It is significantly easier to install and remove than a sewn-in floor and allows the floor to be taken out entirely — useful when positioning a stove on bare ground or cleaning out the tent at season end.

A floor that is permanently stitched to the bottom of the tent walls, creating a bathtub-style enclosed floor. Provides the best seal against drafts, insects, and ground moisture. However, set-up with an internal frame is significantly more difficult — you must stake the tent perimeter down before the frame can be assembled inside. Typically requires additional ground stakes and takes longer to pitch.