Product Overview
Grey U Packers for the precise positioning of window and door frames. They can be easily slid around existing fixings without removing screws, helping to maintain accurate datum and line during set-out.
Each packer is colour-coded for quick on-site identification. The rigid, non-compressible polymer provides a stable bearing under typical frame loads, while the internal comb design ensures a secure grip that resists movement during tightening and final fixing.
The material is non-absorbent and non-staining, ensuring a clean, professional installation against both frames and substrates. These U shaped shims reduce stacks and speeds set-out on variable bases.
Used singly for confident pack-off or combined with finer sizes to tune level and reveal, they maintain consistent plane across the bearing face to protect frame profiles and finishes.
The 10mm thickness is suited to extra-large gaps or specialist fitting where a significant correction or stand-off is required.
Features & Benefits
- Colour coding: Grey body provides quick visual confirmation of size in mixed sets and on busy sites.
- U-shaped profile: Slides around screws and anchors without removal to speed placement and adjustment.
- Internal comb: Interlocks with substrate or fastener line to resist slip and creep during tightening.
- Non-compressible polymer: Maintains level and square under typical frame and trim loads without crushing.
- Moisture and rot resistance: Non-absorbent material suitable for interior and exterior use.
- Clean edges and flat faces: Distributes bearing evenly to protect frame finishes and substrates.
- Reusable during set-out: Can be repositioned during dry-fit and left in place for final fix.
- Thickness: Suited to extra-large gaps or specialist stand-off with minimal stacking; 10mm.
Applications
- Door frames and portals: Establishing substantial stand-off where substrates vary greatly.
- Subframes and carriers: Packing mounting rails to a fixed datum over irregular bases.
- Heavy hardware seating: Backing sizeable plates, rails, and brackets needing strong bearing.
- Threshold and ramp interfaces: Creating consistent levels where significant build is required.
- Façade and cladding prep: Levelling over coarse masonry or uneven concrete with large offsets.
Installation Guidance
- Assess substrate: Ensure bearing areas are sound, clean, and free from debris before packing.
- Dry fit and level: Position packers at known load points to establish line, level, and plumb.
- Slide around fixings: Use the U-slot to place packers without removing screws or anchors.
- Stack with control: Combine sizes only as required, keeping full face-to-face contact.
- Fix and check: Tighten gradually and re-check plumb/level after each adjustment.
- Trim and leave in place: Do not remove after fixing; packers form part of the final assembly.
Compliance & Performance
- Material: Rigid, non-compressible, non-absorbent polymer suitable for frame setting and packing.
- Durability: Resistant to moisture, rot, and common site contaminants; non-staining against most frames.
- Temperature stability: Remains reliable across typical site temperature ranges during installation.
- Use limitation: Intended for setting and packing; not a structural load-bearing shim.
- Important note: Always maintain full bearing and verify the load path; wear appropriate PPE during installation.