At a glance
- Type: Roof flashing, part of the DuraTech LDC chimney system
- Diameters: 10", 12", 14" and 16"
- Listing: UL 103 Type HT (10" to 16"); UL 103 (18" to 24")
- Clearance: At least 2" to combustibles
- Made by: DuraVent
Description
Seals the roof where the chimney passes through; choose it by roof pitch. DuraTech LDC is the large-diameter DuraTech chimney, 10 to 24 inch, listed to UL 103 Type HT in 10 to 16 inch and UL 103 in 18 to 24 inch.
Specifications
Dimensions
| Part | Diameter | Style | Finish | Weight |
|---|---|---|---|---|
| 10DT‑F6HT | 10" | Adjustable Flashing 0/12‑6/12 | — | 1.0 lb |
| 10DT‑FFHT | 10" | Ventilated Flat Flashing | — | 1.0 lb |
| 12DT‑FF | 12" | Flat Roof Flashing | — | 4.5 lb |
| 12DT‑F6HT | 12" | Adjustable Flashing 0/12‑6/12 | — | 7.5 lb |
| 12DT‑FFHT | 12" | Ventilated Flat Flashing | — | 4.5 lb |
| 14DT‑F6HT | 14" | Adjustable Flashing 0/12‑6/12 | — | 8.0 lb |
| 14DT‑FFHT | 14" | Ventilated Flat Flashing | — | 6.0 lb |
| 16DT‑F6HT | 16" | Adjustable Flashing 0/12‑6/12 | — | 10.0 lb |
| 16DT‑FFHT | 16" | Ventilated Flat Flashing | — | 6.0 lb |
Documents
Details
| System | DuraTech LDC |
|---|---|
| Listing | UL 103 Type HT (10" to 16"); UL 103 (18" to 24") |
| Clearance to combustibles | At least 2" to combustibles |
| Price basis | DuraVent 2026 list price (MSRP), effective July 1, 2026 |
Questions
What size do I need?
The appliance's own instructions set the chimney diameter; match it, and keep the whole chimney one diameter.
What clearance does it need?
At least 2" to combustibles, per DuraVent's listing. Never fill the clearance space with insulation.
Can I mix DuraTech with other brands?
No. DuraVent's instructions require authorized DuraTech parts only, to keep the chimney listed.
Where are the installation rules?
In the documents above: supports, firestops, enclosures and chimney height are set by DuraVent's instructions, and the installer follows them.
Why is there no photo?
DuraVent images are being added; the part numbers and sizes on this page are from DuraVent's 2026 list.
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