Awning and Casement sash sizes are regularly queried and this post provides recommendations for double glazed sashes controlled by friction stays suited to a 33mm x 13mm stay cavity.
Snubber Block
The maximum sash sizes are determined by the friction stay limitations of height (awning), width (casement) and weight. So in the case of an awning sash 1500mm wide, the height will be determined by the 20kg max sash weight. Typical sash sizes are shown here.
Sashes at or near the maximum weight often require restrictor stays to assist with control. Typically the stays and window fasteners secure the sash but long or tall sashes may require snubber blocks to control the long side of the sash not secured by the window fasteners. Snubber blocks are a two piece component concealed in the stay cavity which secure the sash from pulling away from the frame under negative wind pressure.
In the next post: oversized casement sashes achieved with hinged panels.
August 23, 2010 at 7:35 am
We had a new house buil approx 7 years ago with aluminium windows/ranchsliders – which have rimu reveals. The builder installed a lot of the windows with large nails thru the rimu reveal. Yet other windows have no nails.
How are aluminium windows with expensive rimu reveals usually installed? How can we cover up the very large nail holes now?
[Reply]
Rob Campion:
August 24th, 2010 at 2:10 pm
Hi Andrew
Its not uncommon to install windows/doors by nailing through liners which are to remain unpainted. Most importantly is that all nail holes should be pre-drilled. There are two finishing options to tidy up the nail holes; punch nails and apply colour-matched putty or punch nails deeper, drill out the hole and apply timber plugs.
[Reply]