The Ultimate Guide to Floor Insulation

by Joe Fisher on June 08, 2024

Introduction to Floor Insulation

Insulating your floors is a smart investment that can lead to substantial energy savings and increased comfort in your home.

Whether you are building a new home or renovating an existing one, understanding the importance of floor insulation and the options available can help you make informed decisions.


Why Insulate Your Floors?

Energy Efficiency: Proper floor insulation prevents heat loss, keeping your home warm in the winter and cool in the summer. This reduces the workload on your heating and cooling systems, leading to lower energy bills.

Comfort: Insulated floors eliminate cold drafts and make walking barefoot in your home more pleasant, especially during colder months.

Soundproofing: Insulation materials can also act as sound barriers, reducing noise transmission between floors, making your home quieter and more serene.


Types of Floor Insulation

  1. Suspended Floor Insulation:
  • Description: This type of insulation is used for floors suspended above the ground, typically in older homes with wooden floors.
  • Benefits: Helps to prevent drafts and heat loss from below, improving overall thermal performance.
  • Ideal For: Older properties with wooden floorboards.
  1. Solid Above Floor Insulation:
  • Description: Insulation is placed directly on top of an existing solid floor, usually followed by a new layer of flooring.
  • Benefits: Enhances thermal efficiency without major construction work.
  • Ideal For: Homes with existing solid floors where adding insulation underneath is not feasible.
  1. Solid Below Floor Insulation:
  • Description: Insulation is installed below a solid concrete floor, either during construction or renovation.
  • Benefits: Provides excellent thermal resistance and reduces heat loss from the ground.
  • Ideal For: New builds and major renovations where the floor can be lifted.

  1. Acoustic Floor Insulation:
  • Description: Specially designed to reduce sound transmission between floors.
  • Benefits: Improves soundproofing, making it ideal for multi-story homes or apartments.
  • Ideal For: Urban homes or buildings with multiple living units.
  1. Screed Additives:
  • Description: Additives mixed into floor screed to improve its insulating properties.
  • Benefits: Enhances the thermal performance of the screed layer, contributing to overall floor insulation.
  • Ideal For: New constructions or renovations where a new screed layer is being applied.
  1. EPS (Expanded Polystyrene) Insulation:
  • Description: Lightweight foam boards used for floor insulation.
  • Benefits: Excellent thermal insulation properties, moisture-resistant, and easy to handle.
  • Ideal For: A wide range of floor types, including both suspended and solid floors.
  1. XPS (Extruded Polystyrene) Insulation:
  • Description: High-performance rigid foam insulation with superior moisture resistance.
  • Benefits: Provides excellent thermal insulation and is highly durable.
  • Ideal For: Areas exposed to high moisture levels, such as basements and ground floors.

Installation Tips


  • Assess the Area: Check for any moisture issues, repair leaks, and ensure the surface is clean and dry.
  • Measure Correctly: Accurately measure the area to determine how much insulation you need.


  • Safety First: Wear protective gear such as gloves and masks, especially when handling insulation materials.
  • Fit Snugly: Ensure the insulation fits tightly between joists or on the floor surface without gaps.
  • Seal Gaps: Use sealant or spray foam to close any gaps around pipes and edges to maintain the insulation’s effectiveness.


  • Cover Exposed Insulation: Use a vapor barrier or covering material to protect the insulation from moisture and physical damage.
  • Check for Air Leaks: After installation, check for any air leaks and seal them to maximize energy efficiency.


Benefits Over Time

Cost Savings: Although the initial investment can be significant, the reduction in energy bills over time results in substantial savings.

Increased Property Value: Homes with good insulation are more attractive to buyers, offering a higher resale value.

Environmental Impact: By reducing your energy consumption, you’re also reducing your carbon footprint, contributing to environmental conservation.



Floor insulation is a worthwhile investment for any homeowner. It not only improves your home's energy efficiency and comfort but also provides long-term savings and adds value to your property.

By understanding the different types of insulation and following proper installation methods, you can ensure your home remains cozy and efficient throughout the year.