A scrim wall refers to a traditional method of constructing interior walls using scrim and sarking before modern materials like plasterboard became prevalent.
Scrim and sarking is an old fashioned technique used to construct walls. Scrim (a woven piece of cloth or sacking) was stapled to wooden panels (sarking) to form walls suitable for wallpapering. This method was common in older buildings, particularly pre-dating the widespread adoption of plasterboard in the 20th century.
Components of a Scrim Wall
This historical wall construction typically involves two main elements:
- Sarking: These are the wooden boards or panels that form the structural base of the wall. They provide a solid surface for attaching the scrim.
- Scrim: This is the fabric layer applied over the sarking. As the reference notes, scrim is a woven piece of cloth or sacking. It acts as a substrate, covering the gaps between the sarking boards and providing a relatively smooth surface ready for finishing.
Historical Context and Purpose
Before the invention and common use of plasterboard (also known as drywall or gypsum board), builders needed alternative ways to create smooth, interior wall surfaces over structural framing. Scrim and sarking offered a practical solution.
- Preparation for Wallpaper: The primary purpose of applying scrim over the sarking boards was to create a surface suitable for hanging wallpaper. The cloth layer helped bridge the gaps in the wooden sarking and provided a more uniform texture.
- Breathability: Unlike modern impermeable barriers, walls constructed with scrim and sarking were often part of building envelopes that allowed for natural ventilation and moisture movement.
Comparing Scrim Walls to Modern Construction
| Feature | Scrim and Sarking Wall | Plasterboard Wall |
|---|---|---|
| Base Material | Wooden boards (Sarking) | Gypsum core between paper layers |
| Surface Layer | Woven cloth/sacking (Scrim) | Paper facing |
| Finish Ready For | Wallpaper (often) | Paint, Wallpaper, or other finishes |
| Installation | Stapled or tacked cloth to wood base | Screwed or nailed boards to studs |
| Prevalence | Older buildings | Modern and contemporary buildings |
Common Issues in Scrim Walls
Due to their age and materials, scrim walls can present specific challenges during renovation or repair:
- Fragility: The scrim fabric can become brittle over time.
- Uneven Surface: The underlying sarking and the scrim layer may not be perfectly flat, leading to unevenness.
- Difficult to Repair: Patching or repairing damage can be more complex than with plasterboard.
- Fire Resistance: Generally less fire-resistant than modern materials like plasterboard.
When dealing with scrim walls, professionals often recommend careful assessment, as modernizing or overlaying with plasterboard might be necessary for durability and a smoother finish.
