How Much Heat is Lost Through the Roof Without Insulation?

A quarter of the heat generated by the boiler, furnace, or other heat sources will escape through the roof of an uninsulated house. Insulating the attic, attic, or flat roof is an effective way to reduce heat loss and lower heating bills. Around 35% of the heat is lost through walls and openings around windows and doors, while around 10% is lost through the floor. These elements create what's known as the “thermal envelope” which is designed to keep heat from escaping from the inside of the house to the outside in colder months and vice versa in hotter months.

Modern homes are usually built airtight so that heat doesn't escape. Older homes, however, can lose up to 30% of their heat if they aren't properly insulated. Insulation helps improve efficiency, maintain a comfortable indoor temperature, and save significant energy costs in the long term. Installing flat roof insulation can help you save similar amounts on your heating bills as insulating a loft.

When reviewing an insulated attic, it's important to check for moisture or any disintegration of the insulation or roofing materials. The ceilings must be insulated to create an air barrier between the living room and an unfinished attic or the space below the roof deck to prevent damage to the roof deck. Recent changes in insulation standards around the world have raised expectations for the thermal resistance of building structures to reduce energy loss for heating or cooling, which has increased the importance of thermal insulation. LogicFoam spray foam insulation is a revolutionary insulation method that has guaranteed homeowners an estimated savings of up to 35% on heating costs.

A layer of rigid insulating plate can be added over the waterproof layer of the roof or directly onto the wooden surface of the roof, with a new weatherproof layer on top of the insulation. Hot air rises to the attic from the living space below and exits the house through the roof if it isn't properly insulated.

Victor Mosbarger
Victor Mosbarger

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