DeckWise · Decking · reviewed September 14, 2026
What the manufacturer actually lists
Air-dried hardwood; the product page also lists composite/PVC. Consult the species chart before choosing the gap.
Named species / categories
Ipe
Explicit exclusions
Pine · Kiln-dried Tigerwood · Kiln-dried Garapa · Kiln-dried Massaranduba
Conditions that change the answer
- The linked Ipe Clip warranty requires authorized-dealer purchase and registration within 45 days, excludes improper installation, and does not pay removal/reinstallation costs. Read the current terms.
- The chart lists air-dried Ipe at 16–20% moisture for Extreme. This is the chart’s condition, not a universal site readiness target.
- Clip dimensions conflict: the 2014 specification gives width .995, tab .148 and leg .242 inch; the current graphic labels 1, .147 and .250 inch. Its fraction labels also conflict with its decimals. No envelope dimension is approved from these references.
- A species name alone does not approve the supplied profile, moisture condition, screw or exposure.
- For saltwater, pool chemicals or treated substrates, verify the complete metal combination and manufacturer corrosion guidance. A stainless insert is not a blanket marine approval.
Connection anatomy
See what the screw actually penetrates
The angled screw penetrates the clip, the first board, then the joist. The next board seats on the free wing; its opposite edge gets the next fastener.
Read with the exact product instructions. Features are simplified for visibility; these are not production drawings or structural details.
Read the dated envelope separately from fit approval
Needs Verification. This drawing visualizes the 2014 specification only. The current product graphic differs: width 1 in, tab .147 in, leg .250 in; some fraction labels contradict the decimals. Do not use either reference as an approved production drawing.
Published standard-height envelope, DeckWise architectural specification (2014), p. 2. Confirm the current part revision. This is not a manufacturing drawing; no tolerances, radii or screw-hole geometry are inferred. Tall versions differ.
Dimensions belong to different parts
Installed gap, clip size, board thickness and groove cut are separate measurements. Mill tolerances and the sold accessory match remain separate approvals.
| Measurement | Inches | Millimeters | Applies to / limitation |
|---|---|---|---|
| Installed gap | 0.09375 | 2.381 | Extreme; not Extreme-S or ExtremeKD. |
| Required groove cut | 0.15625 | 3.969 | Manufacturer interface requirement, not clip thickness. |
| Required groove depth | 0.5 | 12.7 | Centered vertically: lower edge = (actual thickness − cut) ÷ 2. |
| Clip overall width | Unverified | — | Needs Verification: 2014 specification lists 0.995 in. Current product graphic differs and includes inconsistent fraction/decimal labels. Do not use as approved geometry. |
| Clip overall height | Unverified | — | Needs Verification: 2014 specification lists 0.39 in. Current product graphic differs and includes inconsistent fraction/decimal labels. Do not use as approved geometry. |
| Clip tab thickness | Unverified | — | Needs Verification: 2014 specification lists 0.148 in. Current product graphic differs and includes inconsistent fraction/decimal labels. Do not use as approved geometry. |
| Clip leg height | Unverified | — | Needs Verification: 2014 specification lists 0.242 in. Current product graphic differs and includes inconsistent fraction/decimal labels. Do not use as approved geometry. |
Metric values are calculated conversions, not added manufacturing precision.
The screw is part of the system
#8 × 2-inch stainless T15 is a published kit configuration. Other lengths/alloys exist; match the supplied kit and joist. Do not treat all stainless screws as interchangeable.
Installation sequence
Establish the starter-board face attachment and plug detail. Verify the selected board and kit before routing.
For the documented Ipe Clip interface, center a 5/32-inch cut, 1/2 inch deep. Check the actual supplied groove.
Hardwood: predrill a 1/8-inch pilot through the board at approximately 45°. Drive the screw through clip, board and into the joist.
Seat the next board on the exposed clip wing. Fasten its opposite edge; do not screw both boards through the same clip. Avoid overdriving.
Composite/PVC uses the manufacturer’s vertical screw path instead. Check the decking brand’s own instructions and kit. Resolve ends, perimeter and board joints separately.
Manufacturer instructions for this record
DeckWise Extreme product and interface requirements ↗
DeckWise installation instructions ↗
DeckWise species and drying-condition chart (legacy Extreme4 naming) ↗
Current Extreme dimension graphic — conflicting labels ↗
DeckWise architectural specification, October 20, 2014, p. 2 ↗
Read the current instructions for the purchased model. This reference does not certify wall capacity, warranty coverage or an Ipe Woods milling match.