Made in the USA · Patented · Iowa DOT Approved
The FinCap® Adjustable Screed Support System is a complete, stay-in-place screed pipe support kit engineered for concrete slabs poured on vapor barriers, concrete overlays, and sand or rock subgrades. Each kit includes 100 FinCap® Screed Chairs, 100 FinStand® Adjustable Supports, and 100 Base Plate 4.5® — everything needed to set accurate, adjustable screed grade on ground-level and membrane-protected surfaces.
The Base Plate 4.5® is the key component that sets this system apart: its membrane-safe, non-penetrating design will not puncture vapor barriers, while its textured underside bonds securely with adhesive, screws, nails, or construction glue — giving contractors a rock-solid screed setup on even the most demanding substrates.
Threaded rod, hex nuts, and flat washers sold separately.
BUILT FOR THESE APPLICATIONS Vapor barrier slabs · concrete overlays · sand & rock subgrades · sloped slabs · bridge decks · super flat floors (FF/FL)
WHY CONTRACTORS CHOOSE IT
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Complete kit — no hunting for components; Base Plate, FinStand, and FinCap work as an integrated system
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Membrane-safe — Base Plate will not puncture vapor barriers; grips adhesive for secure placement
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Adjustable grade — up to 1-3/4″ (45 mm) of vertical adjustment handles slope changes and subgrade variation
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Stay-in-place design — assembly embeds in the slab permanently; no removal, no disruption
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Non-metallic — medical grade polypropylene; non-conductive and non-corrosive for harsh environments
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High load capacity — holds up to 1,000 lbs for consistent results on super flat floors
KEY SPECIFICATIONS
| Spec |
Detail |
| Screed Pipe |
Nominal 1-1/2″ (40 mm) galvanized, Schedule 40+ |
| Threaded Rod |
1/2″-13 all-thread (sold separately, cut to slab depth) |
| Vertical Adjustment |
Up to 1-3/4″ (45 mm) |
| Min. Assembly Height |
4.75″ (120 mm) from base plate to finished elevation |
| Load Capacity |
Up to 1,000 lbs |
| Spacing |
Every 3–4 ft (1 m) |
| Material |
Medical grade polypropylene |
| Coverage |
~3,000 sq ft (278 m²) per box |
Standards: ACI 302.1R-04 · ACI 117 · ASTM E1155 · Patents: 8,096,182 | 8,544,182
What's in the Box ✔ 100 FinCap® Screed Chairs (#08242FC100) ✔ 100 FinStand® Adjustable Supports (#08244STND) ✔ 100 Base Plate 4.5® (#08245BBP4.5) Threaded rod, hex nuts, and flat washers sold separately.
HOW IT WORKS
- Set your grade. Run a string line or laser at finished slab elevation.
- Establish your screed line. Snap a chalk line for a wood deck or follow deck flute on a metal deck. For use on vapor barrier use a rebar to setup and adhere with adhesive. Space supports every 3–4 feet.
- Install Base Plate + FinStand.
Snap together and secure to deck or adhere to vapor barrier.
- Cut your threaded rod. Cut based on slab depth. (Use steel all-thread for slabs over 6".)
- Secure the FinStand + Base Plate Assembly. Fasten to deck - use screws on metal deck or nails on wood deck. Be sure the FinStand+ Base Plate sits flat and solid.
- Install threaded rod. Thread into FinStand (minimum 1/2" embedment).
- Install the FinCap. Place on threaded rod (minimum 1" embedment).
- Adjust to height. Use the MAKO Driver and adjust rod until marker hits string line.
- Repeat spacing. Install screed supports every 3–4 feet along the screed run.
- Set your screed rail. Place 1.5" ID/1.9” OD screed pipe on the FinCaps. The top of the rail is automatically at finished grade. (A 2” or 1-1/4” screed pipe works as well but the stringline needs to be adjusted.)
- Place and screed. Strike off concrete with hand or mechanical screed, slide screed rail along screed chairs, fill the void with mud, and bull float over.
- Leave in place. FinCap assembly stays embedded in the concrete—no removal, no disruption to the slab.
DOWNLOADS
FinCap Product Data Sheet
FinStand Product Data Sheet
Base Plate Product Data Sheet
