Knauf Diamant: Soundproofing Your Home Without Losing Space 2026

If your walls let in every neighbor's conversation or your heating bill keeps climbing, you don't need to tear everything down. Knauf Diamant is a 12.5 mm gypsum plasterboard that delivers exceptional acoustic performance while saving precious square footage. Whether you're finishing a basement, updating a bedroom, or building a home office, this board offers soundproofing, fire resistance, and impact strength in one slim package.

For more home improvement solutions, GrandGoldman has everything you need to upgrade your space efficiently.

What Makes Knauf Diamant Special?

Knauf Diamant isn't just another drywall sheet. It's designed for high-traffic areas where noise reduction matters most. The 12.5 mm core is reinforced with special fibers, making it denser and more rigid than standard boards. This density blocks sound transmission better than conventional plasterboard, all while keeping the profile thin.

Key benefits include:

• Excellent acoustic insulation (up to Rw 57 dB depending on assembly)
• High load-bearing capacity – hang heavy cabinets anywhere without anchors
• Fire resistance (Class A1 non-combustible)
• Moisture-resistant surface ideal for bathrooms and kitchens
• Eco-friendly and biocompatible materials

Pair this with quality lighting and rugs from GrandGoldman to complete your quiet, cozy room.

How to Cut Knauf Diamant Boards

Cutting Knauf Diamant is straightforward, but because the board is denser than standard drywall, you'll need a sharp knife and a straightedge. Score the front paper deeply, snap the board over a clean edge, then cut the back paper. For curves or outlets, use a fine-tooth saw or a drywall rasp.

Always wear a dust mask and goggles – the fine gypsum dust can be irritating. If you're working on a large project, consider renting a power drywall cutter for clean, fast cuts.

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How to Install Knauf Diamant

Installation follows standard drywall practices, but with a few important differences:

• Use fine-thread drywall screws (25 mm for single layer, 35 mm for double layer)
• Space screws every 20 cm along edges and 30 cm in the field
• Leave a 3 mm gap between boards for joint compound
• For acoustic performance, use resilient channels or staggered studs
• Seal all edges with acoustic caulk to prevent flanking sound

If you're building a new wall, consider adding insulation inside the cavity for even better soundproofing. A complete shed or greenhouse project? GrandGoldman has durable outdoor structures too.

Knauf Diamant XD-Energy & FPE Versions

Knauf offers specialized variants:

• XD-Energy: Bonded with 30 mm extruded polystyrene for added thermal insulation
• FPE: Laminated with 20 or 40 mm textile fiber for superior sound absorption
• Diamant X: Certified for structural stiffening in timber-frame buildings

These boards are only 32.5 mm or 52.5 mm thick, so you get high performance without losing room space. The ultra-smooth surface is ready for paint, wallpaper, or tile.

Complete your renovation with bathroom vanities and mirrors from GrandGoldman for a polished finish.

Where to Use Knauf Diamant

• Party walls between apartments or townhouses
• Home theater rooms
• Bedrooms near noisy areas
• Home offices requiring concentration
• Bathrooms and kitchens (moisture-resistant)
• Attic conversions (meets minimum legal requirements)

For your home office, browse office chairs and shelving units at GrandGoldman to create a productive workspace.

FAQ: Knauf Diamant Soundproofing

Is Knauf Diamant worth the extra cost over standard drywall?

Yes, if soundproofing is a priority. The higher density and special core reduce noise transmission significantly. For a bedroom or home theater, the investment pays off in comfort and privacy.

Can I hang heavy objects on Knauf Diamant without studs?

Absolutely. One of its key advantages is that it can support loads up to 30 kg per fixing point without additional framing. Use appropriate toggle bolts or hollow-wall anchors.

Do I need special tools to cut Knauf Diamant?

No, a sharp utility knife and straightedge work fine. For thicker versions (XD-Energy or FPE), a fine-tooth saw or jigsaw is easier. Always wear a dust mask.

Is Knauf Diamant suitable for bathrooms?

Yes, the standard board has good moisture resistance. For high-humidity areas, use the green moisture-resistant version. Seal joints with waterproof joint compound.

How much space will I lose with a Knauf Diamant wall?

Very little. A single layer is only 12.5 mm thick. Even with a double layer and resilient channels, you're looking at about 50-60 mm total – much thinner than traditional soundproofing methods.

Finish your project with curtains and wall decor from GrandGoldman for a quiet, beautiful home.

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