In the process of using fiberglass mesh, many construction teams and users encounter various problems, such as mesh cracking, exposure, hollowing, and poor adhesion, which affect the construction effect and service life of the project. In 2026, with the widespread application of fiberglass mesh in construction and industrial fields, mastering the solutions to common problems is essential for improving construction efficiency and ensuring project quality. This article summarizes 7 common problems and corresponding solutions to help you solve practical troubles quickly.
1. Problem: Fiberglass Mesh Cracks After Installation. Reason: The mesh specification is too small (low GSM), insufficient tensile strength; the base surface is uneven, and the stress is uneven during use; the mortar is not fully cured before subsequent construction. Solution: Select mesh with appropriate GSM and tensile strength according to the project; ensure the base surface is flat and solid before installation; wait for the mortar to fully cure (at least 48 hours) before carrying out subsequent construction.
2. Problem: Mesh Exposure After Mortar Coating. Reason: The mortar thickness is insufficient (less than 1mm); the mesh is not pressed into the mortar in time; the mesh is laid too loosely. Solution: Ensure the total thickness of the mortar is 2-3mm (two layers of coating); press the mesh into the mortar before the initial setting of the mortar to make it fully bonded with the mortar; lay the mesh flat and tight, avoiding looseness and wrinkles.
3. Problem: Hollowing Between Mesh and Base Surface. Reason: The base surface is not cleaned thoroughly, with floating ash and oil stains; the mortar is too thin or has poor adhesion; the mesh is not wetted before installation (for non-self-adhesive mesh). Solution: Clean the base surface thoroughly to remove floating ash and oil stains; configure the mortar according to the standard ratio to ensure adhesion; wet the mesh with clean water before installation to enhance the bonding force with the mortar.
4. Problem: Mesh Aging and Brittle Breakage in Short Time. Reason: Using regular fiberglass mesh in alkaline environments; the coating is unqualified, lacking effective alkali-resistant treatment; long-term exposure to sunlight and rain without protection. Solution: Replace with alkali-resistant fiberglass mesh for alkaline scenarios; select products with qualified coating quality; take protective measures (such as painting) after construction to avoid long-term exposure to harsh environments.
5. Problem: Poor Adhesion of Self-Adhesive Fiberglass Mesh. Reason: The base surface is uneven or has dust; the ambient temperature is too low (below 5℃) during installation; the mesh is not pressed tightly after pasting. Solution: Level the base surface and remove dust before pasting; choose to install when the ambient temperature is above 5℃; press the mesh tightly after pasting to ensure full contact with the base surface.
6. Problem: Mesh Shrinks and Deforms During Use. Reason: The mesh is not cut according to the standard, and the lap length is insufficient; the weaving density is too low, and the dimensional stability is poor; the mortar is not cured uniformly. Solution: Cut the mesh according to the construction requirements, ensuring the lap length meets the standard (external wall ≥70mm, internal wall ≥50mm); select mesh with high weaving density and good dimensional stability; ensure uniform curing of the mortar, avoiding local overheating or moisture loss.
7. Problem: Mesh Discoloration and Delamination. Reason: The coating material is inferior, and the anti-aging performance is poor; long-term contact with corrosive substances; improper storage before use (moisture, sun exposure). Solution: Select mesh with high-quality coating and good anti-aging performance; avoid contact with corrosive substances during use; store the mesh in a dry, ventilated, and shaded place, avoiding moisture and sun exposure.