
Frame & sash construction
Multi-chamber UPVC profiles use internal chambers to interrupt heat flow. Corners are precision mitered and fusion welded; selected profiles can be foam injected.
Classic vertical operation with strong value.
Open the full RLWD configurator with this product preselected. Enter dimensions, options, installation and project details there, then add the finished configuration directly to your order.
These reference photos illustrate the major construction systems and product details used in each product family. Exact certified ratings, dimensions and component substitutions are confirmed against the final product documentation for the final ordered configuration.

Multi-chamber UPVC profiles use internal chambers to interrupt heat flow. Corners are precision mitered and fusion welded; selected profiles can be foam injected.

Configure 7/8" double-pane or 1 3/8" triple-pane units with warm-edge spacer, argon fill and project-appropriate Low-E coatings.

Casement and awning units use compression sealing and multi-point locking; sliding/hung units use weatherseals, tracks and cam-style locking.

Tempered glass is heat treated for safer breakage. Laminated security glass bonds glass to an interlayer that helps retain fragments after impact.