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Semco Galvanized Large Flat Roof Jack, Mill Finish 5 in.
Regular price $57.50Orders start at $399 — combine any items to reach the minimum. Learn more
Semco Galvanized Large Flat Roof Jack, Mill Finish 5 in.
The Semco Galvanized Large Flat Roof Jack is a non-tapered, uncapped pipe flashing that protects vulnerable roof penetrations on standard pitch roofs. This listing is the 5 in. mill finish size, sold as one piece; the Semco range spans 4 in. to 24 in. diameters measured from the top of the stack.
Key Features:
- Rust resistant: Made from rust-resistant galvanized material.
- Protects penetrations: Shields vulnerable roof pipe penetrations from water entry.
- Non-tapered design: Non-tapered body with no cap, suited to standard pitch roofs.
- 5 in. diameter: This variant measures 5 in. at the top of the stack.
- Mill finish: Unpainted mill galvanized finish blends with most roofing.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Semco |
| Sell unit | 1 piece |
| Product line | Large Flat Roof Jack |
| Material | Galvanized steel |
| Color / finish | Mill |
| Available colors | Mill |
| Available sizes | Semco roof jacks range 4 in. to 24 in. diameter |
| Nominal size | 5 in. diameter |
| Diameter note | Measured from the top of the stack |
| Style | Non-tapered, no cap |
| Pitch | Standard pitch roofs |
| Intended use | Flashing roof pipe penetrations |
Fit and Compatibility:
Fits standard pitch roofs with a pipe stack of the matching 5 in. top-of-stack diameter; Semco's range covers 4 in. to 24 in. diameters if a different size is needed. Pipe boots and cap accessories, if desired, are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One 5 in. mill finish galvanized flat roof jack, sold per piece.
Q: How is diameter measured?
A: Diameter measurements are taken from the top of the stack.
Q: Does it have a cap?
A: No, this is a non-tapered roof jack with no cap.
Q: What roof pitch is it for?
A: It is designed for standard pitch roofs.
Q: Are other diameters available?
A: Yes, the Semco range spans 4 in. to 24 in. diameters.
Q: Will it rust?
A: It is made from rust-resistant galvanized material.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Match the jack's top-of-stack diameter to your vent pipe, not the pipe's nominal size, before ordering. Seat the base flange in a bed of roofing cement or sealant and integrate it into the shingle courses above so water sheds over, not under, the flange. For taller stacks or capped applications, confirm a capped model instead.
Seal the flashing properly at the penetration; an unsealed roof jack is a common leak point—work safely with roof anchors when installing.
Order the Semco 5 in. galvanized large flat roof jack to protect your roof penetrations.
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