Aerogel felt construction process

Since aerogel felt is a special material, ordinary workers may not have seen it before. Special attention should be paid to the two core points of “hydrophobicity” and “dust protection” during construction .

Construction Guidelines for Aerogel Felt Window Frames/Cold Bridge Areas

1. Preparations (Protection First)

• Protective measures : Aerogel powder is extremely fine and absorbent; contact with skin can cause dryness and a rough feel. Construction workers must wear masks (N95 recommended) , goggles , and latex gloves .
• Cutting tools : Prepare a large utility knife and a long ruler.
• Base requirements : The cement base at the junction of the windowsill and the wall must be flat, firm, free of dust and oil stains.

2. Cutting and Pre-laying

• Precise measurement : Cut the aerogel felt according to the depth of the window frame (usually 10-20 cm ) to minimize joints.
• Pre-laying : Place the cut strips along the edge of the window frame to ensure that the corners are flat.

3. Adhesive application (key step)

Note: Aerogel is extremely hydrophobic and must never be directly bonded with cement mortar!

• Adhesive selection : Nail-free adhesive, modified polyurethane structural adhesive , or special aerogel adhesive must be used .
• Adhesive application method : Apply adhesive to the back of the aerogel felt using a “dot bonding” or “strip bonding” method, and press it evenly onto the cement base.
• Fixing : After compaction, if the surface rebounds, it can be fixed with construction tape or temporary wooden strips for 12 hours.

4. Surface corner protection and leveling

• Install corner protectors : Plastic corner protectors must be installed at the corners of the window frame to protect the aerogel from being flattened and to facilitate subsequent plastering.
• Interface treatment : Since the aerogel surface does not absorb water, applying putty directly will cause it to peel off. It is essential to first apply a layer of interface agent (or adhesive backing) to the aerogel surface , or apply a full layer of fiber mesh , before proceeding with the subsequent putty application.

5. Acceptance Criteria

• Flatness : There is no obvious wobbling when touched, and it fits tightly with the window frame and wall.
• Coverage : Ensure that the aerogel is completely covered by the subsequent topcoat (putty or latex paint) without any white showing.

💡 Tips to Avoid Pitfalls

• Do not wet the surface with water : If the worker has a habit of wetting the wall with water, please stop him. Although water will not damage the aerogel, it will prevent the adhesive from bonding properly.
• Do not over-compress : Aerogel relies on nanopores for insulation, so do not compress it too much when nailing the insulation nails. Maintaining its original thickness will achieve the best effect.
• Sealing : If there are gaps at the edges of the window frame, fill them with expanding foam first, cut them flat, and then apply aerogel.