To protect building fabric which one of these should be used when soldering:

• A. Heat proof mat
• B. Fire blanket
• C. Insulation foam
• D. Rubber mat

Answer: (A)

When you solder, a hot iron and molten solder can transfer heat to nearby surfaces, risking scorch marks or ignition of building materials. A heat-proof mat provides a dedicated, non-combustible barrier under the work to absorb and resist that heat, protecting the surface and catching any drips. It’s specifically designed to withstand the high temperatures involved in soldering, so it’s the safest and most reliable option for safeguarding building fabric. The other items don’t offer the same protective qualities: a fire blanket is for active fires, not as a work surface shield; insulation foam is flammable and not heat resistant; a rubber mat can melt or burn when exposed to heat.