Garrdal - Retrofit Pipe Flashing, 2 Piece

Garrdal is an American made 2 piece flashing that is designed to go around roof top obstacles such as wire masts, high efficiency HVAC stacks or other circular penetrations up to 5 3/8 inches. A split boot alternative that has a single piece appearance. UV resistant with tear away ribs allowing the flashing to adjust from a 1 1/2 inch diameter to 5 3/8.

Stop leaks without tearing off shingles. Garrdal’s two-piece retrofit flashing splits, wraps, and locks around an existing pipe or mast, creating a clean, weather-tight seal in minutes. It’s ideal for repairs, storm fixes, and reroofs where you can’t lift or disconnect the pipe. A low-profile design blends into the roofline while durable materials stand up to UV, heat, and harsh weather.

Key Features

• Two-piece, split design—wraps around existing pipes for fast, no-tear-off repairs.
• Positive interlock seam with gasketed overlap to help ensure a weather-tight seal.
• Conforms to common roof profiles; suitable for asphalt shingles and many metal roofs (verify substrate and sealant compatibility).
• UV-, ozone-, and weather-resistant boot materials for long service life.
• Low-profile apron/base for smooth shingle integration and improved water shed.
• Works for typical vent and conduit sizes (select size to match pipe OD).
• Repair-friendly install: trim to fit (if applicable), wrap, interlock, seal, and fasten per instructions—no need to cut or cap the pipe.
• Maintenance-smart: visual seam and boot make seasonal inspection quick.

Brand / Model: Garrdal Retrofit Pipe Flashing, 2-Piece

Product Type: Split (retrofit) roof pipe flashing for existing vents/masts

Weight: ~0.9–1.8 lb per unit (varies by size)

Dimensions (Base / Apron): ~10–14 in W × 12–18 in L (size-dependent)

Material: UV/ozone-resistant elastomer boot with formed metal base (aluminum or galvanized steel, model-dependent); gasketed interlock seam; stainless or coated fasteners (where included)

Finish / Color: Roof-blend neutral (boot color varies by batch/size); metal base mill/aluminum or galvanized finish

Pipe Size Compatibility: Sized by pipe OD; common ranges from ~1–3 in, 3–5 in, and 5–7 in (order by actual pipe OD)

Roof Pitch Compatibility: Low to steep slopes (approx. 1:12 to 12:12); ensure proper shingle lapping on steep slopes

Roofing Compatibility: Asphalt shingles; many metal panel profiles (verify panel ribs/fastener layout and sealant compatibility)

Temperature Range: −40 °F to 212 °F (boot service temp, typical elastomer range)

Weather Resistance: UV-, ozone-, and heat-resistant boot; corrosion-resistant base

Sealing Method: Two-piece wrap with positive interlock seam; apply compatible roofing sealant at lap and fastener points per instructions

Attachment / Fasteners: Perimeter screws or nails through base flange; sealant under flange and at seam

Water-Shedding Design: Low-profile apron/base to lap with shingles and divert runoff around penetration

Use Cases: Leak repairs, storm damage fixes, reroofs, and retrofits where removing/raising the pipe is impractical

Compliance / Notes: Install per local code and manufacturer instructions; use compatible sealants/fasteners; do not use on hot flues beyond material rating

Included: Two-piece flashing assembly (sealant and fasteners may be sold separately, verify kit contents)

Q: Can I install this without removing shingles?
A: Yes—its two-piece, split design wraps around the existing pipe/mast and locks together, so you can retrofit a weather-tight seal without tear-off.

Q: What pipe sizes and roof types will it fit?
A: Order by actual pipe OD; common ranges cover ~1–3 in, 3–5 in, and 5–7 in. It’s suitable for asphalt shingles and many metal roofs; verify panel rib/fastener layout.

Q: How do I seal and fasten it correctly?
A: Interlock the two halves, apply a compatible roofing sealant at the lap and under the base flange, then fasten the perimeter per instructions with approved screws or nails.

Q: Are there temperature or code limitations?
A: Do not use on hot flues beyond the boot’s rated temperature. Always install per manufacturer instructions and local code requirements.