By Jonathan Smith · Reviewed by Reynaldo Carrasco · Last updated July 1, 2026
Stone warning: Granite, quartz, marble, and quartzite island tops should be templated and installed by your fabricator. This guide covers laminate and butcher block DIY — not 3cm slab field installs.
Before You Start
- Cabinets level and screwed together
- Island anchored to floor if code requires
- Overhang planned: stone needs corbels beyond ~10″ unsupported
Step 1: Measure Overhang
Seating sides: 12–15″ knee clearance typical. Reynaldo’s rule: no stool seating on less than 12″ unsupported stone overhang without corbels.
Step 2: Build Substrate Strips
Without ¾” buildup strips on cabinet rails, laminate lips bind drawer openings. Glue and screw strips on perimeter and every cabinet seam before setting the top.
Step 3: Adhesive + Screws
- Construction adhesive bead on buildup strips
- Pilot holes from below — screw length = buildup + ½” max into laminate
- Coarse-thread screws every 8–12″ on strips
Butcher Block
Wood moves — use slotted holes or clips allowing seasonal expansion. Don’t glue all edges on butcher block.
When the Top Is Stone
Fabricator sets on shims, silicone on rails — not homeowner screws through slab. See choosing a fabricator.
