Does timber need to be treated on wall plate?

Yes, treat the timber for longevity. C16 suffices for standard loads; opt for C24 for heavier demands.

Hi there, you can use C16 timber for the wall plate. The timber would be better being treated but its not required. Thanks

Hello Rick,
Treated timber is recommended for wall plates, especially if they are in contact with masonry or exposed to moisture. Treated timber provides better resistance against decay, insects, and fungal growth.
While NHBC guidance doesn’t explicitly specify timber treatment, it’s generally advisable to use treated timber for wall plates to enhance their durability and longevity.
The choice between C16 and C24 timber depends on the load-bearing requirements and the span of the wall plate.
C24 timber is stronger and more suitable for longer spans or heavier loads. It’s commonly used in situations where higher structural performance is needed.
C16 timber is adequate for many applications, especially when the spans are shorter and loads are moderate.
Consider the specific design requirements, roof structure, and local building practices when selecting the timber grade.
Kind regards.
Craig

Yes it should be treated for longevity

Hi Rick! When it comes to bedded wall plates, especially in contact with mortar and brick walls, it's generally a good idea to use treated timber to prevent decay and ensure longevity. Treated timber is resistant to rot and fungal decay, which can occur in damp environments like those found in contact with masonry.

As for whether to use C16 or C24 timber, it depends on the structural requirements and regulations in your area. C24 timber is generally stronger and more suitable for heavy loads or spans, while C16 is adequate for lighter loads and shorter spans. If the NHBC guidance doesn't specify, you might want to consult with a structural engineer or building inspector to determine the appropriate grade of timber for your specific application.

In any case, using treated timber will help ensure the durability and integrity of your wall plate over time.