Views: 0 Author: Site Editor Publish Time: 2026-01-12 Origin: Site
Shijiazhuang Qingquan Cellulose Co., Ltd.is a Chinese manufacturer of HPMC/PVA/CMC/MHEC/HEC. Hydroxypropyl methylcellulose (HPMC) is one of our key products, known for its excellent quality and reasonable price. It is widely used as a thickener and water-retaining agent in mortar for construction, and is popular with customers worldwide.
Thermal insulation mortar, as a functional building material, is widely used due to its thermal insulation and fire resistance properties. Below is a detailed introduction to its main application scenarios and standard construction methods.
I. Core Application Scenarios
The application of thermal insulation mortar mainly revolves around building insulation and fire protection:
Building exterior wall insulation: Used for the internal and external insulation layers of new or renovated building exterior walls, it can effectively improve the thermal insulation performance of the wall, and is a key material for meeting building energy efficiency standards (such as 50% or 65% energy saving rate). Due to its trowelable application, it is highly adaptable to irregularly shaped walls.
Fire isolation and special locations: It acts as a fire barrier in exterior wall insulation systems, especially when used on the outer layer of organic insulation boards (such as polystyrene boards), significantly improving the overall fire rating of the system. It is also suitable for places with strict fire protection requirements, such as high-density residential buildings, public buildings, and machine rooms.
Treatment of structural thermal bridges: Used to wrap thermal bridge areas such as balconies, door and window openings, structural columns, and beams, it can effectively reduce abnormal heat transfer and prevent indoor condensation and mold growth.
Roof and floor insulation: Used for the thermal insulation layer of accessible roofs, green roofs, basement ceilings, and the insulation layer under floor radiant heating (underfloor heating), improving energy efficiency and comfort.
Interior partition walls and separating walls: Used for interior insulation in stairwells, partition walls between units, kitchens, and bathrooms, improving sound and thermal insulation effects and enhancing the living experience.
II. Standard Construction Methods and Steps
Correct construction is crucial to ensuring the desired results. The main process is as follows:
1. Substrate Preparation
This is the first and most critical step. Dust, oil stains, and loose materials must be thoroughly removed from the surface of the base wall to ensure a firm and level substrate. Before construction, the substrate usually needs to be moistened with water, but there should be no standing water on the surface.
2. Application of Bonding Agent
Apply a special bonding agent (interface mortar) to the prepared substrate and create a serrated pattern. This seals the pores of the substrate, enhances the adhesion between the insulation mortar and the wall, and prevents delamination.
3. Establishing Verticality, Squaring, and Setting Reference Points
Based on the designed insulation layer thickness, use insulation mortar to create standard reference points or guides on the wall surface, serving as benchmarks for the plastering thickness. The spacing is generally 1.5-2.0 meters. This effectively controls the flatness and verticality of the entire wall surface.
4. Insulation Mortar Mixing and Application
Mixing: Mix the dry powder with clean water (water-to-powder ratio is approximately 0.35-0.45, see product instructions for specifics). It is recommended to use an electric mixer, mixing for 2-3 minutes until uniform and free of lumps. Let it stand for 5 minutes, then stir briefly before use. The mixed mortar should be used within the specified time (usually 1-2 hours).
Layered Application: Layered application is mandatory. The thickness of each layer should be controlled at 10-20 mm. The next layer can only be applied after the previous layer of mortar has initially set (usually after more than 24 hours). Continue until the total designed thickness is reached, and finally, level the surface with a trowel.
5. Curing
After the insulation layer construction is completed, it needs to be naturally cured for 3-7 days (depending on the ambient temperature). Avoid water, impact, and vibration during the curing period.
6. Anti-Cracking Protective Layer Construction
After the insulation layer is dry and cured, apply anti-cracking mortar (finishing mortar), simultaneously embedding alkali-resistant fiberglass mesh. The total thickness of the anti-cracking protective layer is approximately 3-5 mm. This step effectively prevents cracking of the insulation layer and provides a good base for subsequent finishes (paint or tiles).
III. Key Considerations and Selection
Environment and Materials: The construction environment temperature should be between 5℃ and 40℃, and construction should be avoided on rainy or windy days. Never add water to dried-out mortar and reuse it. The amount of mortar mixed at one time should be determined according to the construction speed to avoid waste.
Joint Treatment: Cement mortar should be used to create corner protection at door and window openings and inside and outside corners. In damp areas such as kitchens and bathrooms, waterproof mortar should be applied or waterproof coating should be painted on the surface after the insulation layer has dried.
Material Selection: Currently, the mainstream and recommended material is inorganic thermal insulation mortar (especially vitrified microsphere thermal insulation mortar). It has good fire resistance (Class A non-combustible) and strong durability, but its thermal conductivity is slightly higher than that of organic materials. However, polymer-modified polystyrene bead thermal insulation mortar (organic type) is restricted in many places with high fire safety requirements due to its poor fire resistance.
