How to attach plasterboard to hardwood beam ceiling?

[HiBobb]

We have a shower and toilet area in our garage but it has no ceiling installed. My problem is two fold, 1) attaching what I assume will be a cris cross of timbers to attach the plaster board to and then 2) attaching those timbers to the large hardwood beams?

[EricL]

Hello @HiBobb, 

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about attaching a plasterboard ceiling. 

You're absolutely right a ceiling frame will need to be built and properly supported. This means it must be securely anchored to the roof trusses to ensure stability and durability.

Ceiling frames are typically constructed using timber or metal battens, depending on the type of structure and load requirements. The most common timber sizes for ceiling joists range from 90x45mm to 140x45mm, but the exact dimensions will depend on the span and weight the ceiling needs to support. For metal framing, furring channels and top cross rails are commonly used.

I strongly recommend consulting a qualified builder or structural engineer to determine the appropriate timber size and anchoring points for your ceiling frame. This will ensure compliance with Australian building codes and prevent issues like sagging or structural failure.

Once the frame is securely in place, you can begin covering it with ceiling plasterboard. Standard 10mm or 13mm plasterboard sheets are commonly used with thicker options available for enhanced soundproofing or fire resistance. Be sure to stagger the joints and use appropriate screws or adhesive to secure the sheets for a smooth and long-lasting finish.

If you need further assistance, please let us know.

Eric