Self-adhesive aluminum foil

Application of self-adhesive aluminum foil in building insulation: performance advantages and construction technology analysis

1. Core performance advantages of self-adhesive aluminum foil in building insulation

Heat reflection and radiation barrier
The aluminum foil layer can reflect up to 90% of infrared and thermal radiation, significantly reducing the heat gain of buildings in summer.
Compared with traditional insulation materials (such as foam boards), reflective insulation is more suitable for high temperature difference environments.

Moisture-proof and airtightness
Aluminum foil naturally blocks water vapor, prevents condensation water from penetrating, and protects building structures (such as roofs and inside walls).
The self-adhesive layer (mostly acrylic glue) fits tightly to the substrate, reducing air leakage and improving insulation efficiency.

Lightweight and construction convenience
The thickness is usually 0.03~0.1mm, which hardly increases the building load and is suitable for renovation projects.
The self-adhesive design eliminates additional adhesives and reduces labor costs.

Fireproof and durability
The aluminum foil itself is non-flammable (in line with Class A fire protection standards), and the adhesive layer needs to choose a high temperature resistant formula (such as some products can withstand 120℃).
The UV-resistant version can be used in exposed scenes (such as roof surface).

2. Typical application scenarios and cases

Roof insulation system
Usage: Paste on the inside of the roof or cover on the surface of the insulation cotton to form a reflective insulation layer.
Case: For sloped roof houses in the southern region, the top floor room temperature can be reduced by 3~5℃ when used in combination with the air layer.

Wall insulation auxiliary layer
Usage: Paste on the outside of the insulation board (such as XPS) to enhance moisture resistance and reflect external heat radiation.
Note: Avoid single use in cold areas to prevent indoor heat from losing to the outside in winter.

Pipe and duct insulation
Usage: Wrap air conditioning pipes or hot water pipes to reduce heat loss/condensation, which is common in commercial buildings.

3. Analysis of key construction technologies

Substrate pretreatment
Clean the surface (no dust or oil stains), and the wet base surface needs to be dried before construction.
It is recommended to apply primer (such as epoxy resin) to the uneven base surface to improve the bonding strength.

Pasting process
Cutting: Cut as needed, leaving 5%~10% overlap.
Pressure: Use a roller to compact and remove bubbles (especially at the edges).
Joint treatment: Use aluminum foil tape to seal the overlap to prevent thermal bridge effect.

Common problems and solutions
Debonding: Choose a weather-resistant adhesive layer (such as modified acrylic adhesive) to avoid direct exposure to high temperature and high humidity.
Reflection failure: The aluminum foil surface needs to retain an air layer (at least 10mm), and direct contact with other materials will reduce the effect.