We Deliver!

Serving homeowners & builders for over 50 years!

Commercial Lumber & Building Supply-logo Celebrate20Years


Ceiling bed

A great drywall contractor relies on precision skills but also depends on quality products. At Commercial Lumber & Building Supply, we carry superior drywall supplies that ensure you of the best final results.


From Firecode sheetrock and cement board, to joint compound and drywall tape, we really do have everything you need. For your convenience, we offer delivery of these heavier building materials.

Products that ensure precision drywall work

Our drywall-related products

Gypsum products

  • Moisture resistant

  • Firecode (5/8")

  • 1/2" lightweight

  • Densarmor - mold guard

  • DensGlas Gold-exterior sheathing

  • DensShield - tile board

  • Shaft wall liner - Coreboard


Joint compound

  • All-Purpose (green)

  • All-Purpose lightweight (blue)

  • All-Purpose medium (purple)

  • Easy sand - 20 minute, 45 minute, and 90 minute

  • Plaster of Paris

  • Structolite


Cement board

  • Durock

  • James "Hardi" board

Get FREE local delivery within 5 miles! Call



Visit us at: 130 Main Street,

Islip, NY 11751

Sheetrock All-Purpose

We'll go the extra mile to get your drywall delivered promptly

Drywall tapes and drywall bead

  • Paper tape rolls

  • StraitFlex

  • Fiber mesh tape


Trim Tex drywall bead

  • Flex arch bead

  • Mud on ceiling bead

  • J and L bead

  • Vinyl corner bead


Drywall bead and fiberglass tape

  • Mesh fiberglass tape

  • Corner bead (8' and 10' lengths)