Adjustable Pedestal Calculator

Choose your deck type to work out which Moonbay adjustable pedestals you need, how many, and where each one goes.

Moonbay Pedestal Tile Calculator

Enter your area and tile details to work out how many Moonbay self-levelling pedestals you need, which sizes go where, and what it costs. Then add the lot to your cart in one click.

Area

Length across the fall (m) Width down the fall (m)

Gap between tiles and walls or cladding (mm)Enter 0 if the edges are open, for example beside a pool or lawn.

Tiles

Tile length across the fall (mm) Tile width down the fall (mm)

Tile thickness (mm) Gap between tiles

Heights and fall

Top of tile to substrate at the shallow end (mm) Measure from the finished tile surface down to the membrane or slab at the highest point of the substrate. Substrate fall (1 in …)

Layout Pedestal configuration Add centre supports for heavy loads. Tiles 900mm or longer get extra supports automatically. Snap off any spacer tabs that would sit under a tile. Cut tile layout Only matters if whole tiles don't fit exactly. Add spares We recommend adding 2 to 5%. Substrates are rarely perfectly flat, and a few extra on hand covers low spots and extra support under cut tiles, so you don't fall short mid-job. Unused pedestals can be returned within 30 days.

Layout plan

Pedestal heights row by row

Pedestal height is from the substrate to the underside of the tile. Each row of pedestals runs across the fall, numbered from the shallow end. Row 1 sits along the shallow edge of the deck, the last row along the deep edge, and the rows in between sit under the lines where tiles meet. Mid-tile and centre supports sit under the middle of a tile side or the tile itself.

What you need

Optional extras

Not needed for every job, but handy for a neater finish.

Moonbay Pedestal Edge Buffer: sits on the pedestal head along walls to keep tiles spaced off the cladding.
Moonbay Stainless Steel Clips: hold cut tiles upright to close off the exposed sides of a raised deck.

This calculator is a guide. Substrates are rarely perfectly flat, so check heights on site before you order. Moonbay self-levelling heads compensate for falls of 0 to 5%. Ordered the wrong sizes or quantities? Unused products can be returned or swapped within 30 days, so get in touch and we'll sort it out. See our returns policy. Need help? Call 09 444 2260 or email mail@constructionproducts.co.nz.

Moonbay Pedestal Decking Calculator

For timber or composite decking on joists. Enter your deck, board and joist sizes to work out how many Moonbay self-levelling pedestals you need, which sizes go where, and how much joist, decking and screws to allow. Then add the pedestals to your cart in one click.

Deck

Length down the fall (m) Width across the fall (m)

Joists run down the fall so water drains along them.

Decking boards Board type

Board width (mm) Board thickness (mm)

Gap between boards (mm)Check with your board supplier.

Joists

Joist width (mm) Joist depth (mm)

Use timber or aluminium joists. Composite joists aren't suitable on pedestals.

Max joist centres (mm)Leave blank for auto: 400 for composite, 450 for timber up to 20mm thick, 600 for thicker timber. Max pedestal centres along joists (mm)Check your joist supplier's span table.

Heights and fall

Top of deck to substrate at the shallow end (mm) Measure from the finished deck surface down to the membrane or slab at the highest point. Substrate fall

Spares Add spares We recommend adding 2 to 5%. Substrates are rarely perfectly flat, and a few extra on hand covers low spots and joist joins, so you don't fall short mid-job. Unused pedestals can be returned within 30 days.

Also allow for

Timber quantities are a guide and don't include wastage. Allow extra for cuts and offcuts. Where joists are joined, put a pedestal under each join.

Layout plan

Pedestal heights along the joists

Each row is a line of pedestals across the deck, one under every joist, numbered from the shallow end. Pedestal height is from the substrate to the underside of the joist.

Pedestals

Optional extras

Not needed for every job, but handy for a neater finish.

Moonbay Stainless Steel Clips: hold timber or tile fascia upright to close off the exposed sides of a raised deck.

This calculator is a guide. Substrates are rarely perfectly flat, so check heights on site before you order. Joist and board spans depend on the timber you use, so confirm them with your supplier. Moonbay self-levelling heads compensate for falls of 0 to 5%. Ordered the wrong sizes or quantities? Unused products can be returned or swapped within 30 days, so get in touch and we'll sort it out. See our returns policy. Need help? Call 09 444 2260 or email mail@constructionproducts.co.nz.