Perlite as a Construction Filler
Expanded perlite’s high insulating qualities, light weight, and versatility make it an essential part of the construction industry for loose fill insulation and lightweight insulating concrete. It is the ideal construction aggregate filler for masonry fill insulation, roof decks, floor systems and other significant areas that need insulation.
Perlite and Gypsum Products
Perlite plaster aggregate mixed with gypsum provides an ideal base coat for plaster for interior walls, membrane fireproofing to the underside of the floor and roof assemblies, and for structural steel members.
Perlite and Joint Compounds
Joint compounds produced with perlite are lightweight and easy to work with. Perlite also improves the bonding properties and provides greater uniformity.
Cavity and Block-fill Perlite
There are countless reasons why nearly 50% of manufactured expanded perlite is used as a construction filler. Some of the reasons include high insulating qualities, light weight and its adaptability. But what it really comes down to is economics and the monetary savings of using perlite. The return on investment when using expanded perlite for loose-fill cavity and construction block-fill can be reached rather quickly as reductions in energy consumption are quickly achieved. In addition, businesses are saving money every day because expanded perlite is light weight, pours easily and efficiently into place without a general investment in equipment and experience. Expanded perlite for loose-fill cavity and construction block-fill insulation can be poured straight into the cavity walls or a self-dumping hopper. This allows for easy guidance and smooth operation along the wall to direct the moving perlite into the cores of the cavity, mitigating any voids and air pockets.
Advantages of perlite masonry fill are as shown below:
- Energy Saving Insulation
- Fills All Voids and Cavities
- Easy installation
Perlite Uses and Applications as a Construction Filler
Nearly 50% of expanded perlite worldwide is used by the construction industry, largely in part because of its versatility. Some construction applications include:
- Aggregate in lightweight insulating concrete
- Insulating and lightweight plaster
- Loose fill insulation material for concrete masonry blocks, cavity walls, in residential homes
- Fireproofing sprays
- Chimney fills
- Interstitial floors
- Acoustical sprays
- Green roof soils
- Fireproof insulating door cores
- Plaster Aggregate
- Textured paint
- Decorative stone
- Tape joint compound
- Cultured marble
- Ceiling tiles
- Underslab insulation
- Cement stucco
- And more
Ceiling Tiles, Pipe Insulation, Roofing Board, & Fire-rated Door Cores
Expanded perlite makes a lightweight concrete for roof decks and an insulative base for in-ground vinyl pools Perlite is used as an extremely lightweight aggregate for insulating concrete in roof decking, floors, decorative stone products, bricks and tiles, tilt-up panels, pottery, cast sculpture, and more. By following speciﬁc procedures, typical ready-mix batching equipment and trucks can be used for perlite concrete.
The largest use of perlite ore in North America is its expansion and use in ceiling tile manufacturing.
Benefits of Expanded Perlite for Ceiling Tiles
Some Ceiling Tiles Contain up to 70% by Weight of Expanded Perlite because of its Numerous Benefits
- Fire resistant
- Improved acoustical properties
- Reduced water absorption
- Energy savings
Wet-Felted Acoustical Ceiling Tile and Panels
Expanded perlite (40-50%) is also present in a unique wet-felted acoustical tile and ceiling panel composition. It has been presented that expanded perlite is favorable in the production of ceiling tiles and panels to reduce the tendency to retain water in a composition containing expanded perlite, mineral wool, and a secondary binder such as starch or clay. It has been found that an acoustical tile composition containing wet-felted, mineral fiber and lightweight expanded perlite help to promote an efficient installation, anti-sag performance and prevent mold and mildew.