Floor Insulation ConstructionInsulating the floors of your home

Floor insulation: the principle

The Principle

The walls of the house are the only barriers between the inside of the house and the outside air.

The larger the surface area of these walls, the greater the heat loss.

Just like the walls and the roof, it is important to insulate the floors as well.

The heat loss in a house is most often

due to poor insulation.

Every part of the house facing the outside presents a risk of heat loss.

The consequence is ruthless: an over-consumption of energy to heat the house.

It is therefore very important to insulate your house properly.

SIMPLICITY OF THE WORK

Floor insulation does not require major work in your home.

The installation of insulation is done in less than a day.

IMMEDIATE ENERGY SAVINGS

As soon as the floor is insulated, the energy consumption for heating is significantly reduced.

The return on investment is not long in coming.Floor Insulation Construction

Floor insulation: how does it work?

How does it work?

The walls of the house are the only barriers between the inside of the house and the outside air.

The larger the surface area of these walls, the greater the heat loss.

Just like the walls and the roof, it is important to insulate the floors as well.

10% heat loss avoided.

By insulating the floor of your house you can save up to 10% of the energy costs for heating.

The importance of the choice of insulation.

The role of insulation is to retain heat in the house. The finishes of its installation are therefore very important and deserves to be done by a professional.

There are different insulation technologies.

We find them in two forms: rolls or flakes.

The flakes are dispersed in the smallest corners to avoid thermal bridges.

The insulating materials used have a high thermal resistance.

This is how they retain the heat of the house, not allowing any heat flow (either from the cold outside air or from the heat inside the house) to pass through them.Floor Insulation Construction

The insulation of the floors of your house: the implementation

Mise and oeuvre

Depending on the type of your low floor and its access, the type of insulation will be chosen.

INSTALLATION OF INSULATION IN ROLLS OR SHEETS :

Rolls or sheets of insulation are placed on the underside of the floor, either mechanically fastened or glued for floors in crawl spaces or unheated rooms.

For wooden floors, it is possible to install an insulated suspended ceiling. Rock wool is then inserted between the wooden floor and the insulated suspended ceiling.

In the case of a floor on a terrace, the only solution is to install insulation under a floating slab.

INSTALLATION BY A PROFESSIONAL

The quality of the insulation installation is very important since the finishes are decisive for the efficiency of the insulation.

It is important to check that there are no gaps between the insulations. This would generate an air leakage that would divide the thermal resistance by 5.

The superior quality of the insulation cannot compensate for this loss.

That is why, even if the installation of floor insulation could be done by a private individual, the technical competence of a professional will guarantee the thermal efficiency of the insulation work.

How to choose the right insulation for your home’s floors

Technical characteristics

There are three technical characteristics that should be kept in mind when choosing insulation materials:

Thickness in centimeters:

It is advisable to insulate at least 20 cm thick to obtain a satisfactory level of insulation. The thickness of the insulation will be defined according to the insulation itself. For Cellulose Wadding, it is advisable to insulate on 27cm, against 22.2cm for loose rock wool. For Hemp Wool in rolls it is necessary to insulate 23.4cm against 25cm of wood wool.

Thermal conductivity (W/m.°C)

Insulation materials must have very low thermal conductivity.

The lower the thermal conductivity of a material, the lower its ability to carry heat.  This makes your home better insulated.

Thermal resistance (m².°C/W)

Thermal resistance is the result of the performance of the insulation of the house. It is a function of the choice of the insulating material used and the thickness of the insulation.Floor Insulation Construction

How much does it cost to insulate the floors of a house?

What is the cost?

INSULATING THE ATTIC SPACE OF YOUR HOME PREVENTS HEAT LOSS AND

THUS REDUCING THE HEATING NEEDS OF THE HOUSE.

Roofing losses can result in a 10% waste of heating energy.

Its financial impact on a household’s energy budget is therefore just as important as the choice of heating method itself.

A LOW INVESTMENT COMPARED TO THE ENERGY SAVINGS ACHIEVED

The amount of work will depend on the choice of materials and its thickness.

Count about :

– 11 euros/m² for Rock Wool in bulk on 22cm thick,

– 15 euros/m² for Cellulose Wadding on 27 cm thickness recommended,

– 30 euros/m² for Hemp Wool in roll on 23cm thick,

– 45 euros/m² for Wool on 25 cm thick.

Be careful, mineral wools (rock wool) can be quite irritating.

It is therefore not recommended to use it if you plan to pierce the ceilings to integrate light spots for example.

Tax credit for floor insulation A REDUCED INVESTMENT THANKS TO THE TAX CREDIT.

The French state wishes to help the development of the use of renewable energies.

15% tax credit for materials laid by a professional.

What amount of expenses does the tax credit apply to?

The tax credit covers materials, excluding labour, meeting the characteristics.

What is the amount of expenses eligible for the tax credit?

For the same taxpayer and the same dwelling, the amount of expenses eligible for the tax credit may not exceed, for a period of five consecutive years between January 1, 2010 and December 31, 2015, the sum of € 8,000 for a single person, widow or divorced and € 16,000 for a couple subject to joint taxation. This sum is increased by €400 per dependant within the meaning of Articles 196 to 196B.

To find out your rights to the tax credit, you are advised to refer to the provisions of article 200 quater of the General Tax Code.

For the application of this measure, it is strongly recommended to refer to :

The website www.impots.gouv.fr (page on the tax credit)

Article 200 quater of the General Tax Code, Article 90 of the 2005 Finance Act, Article 83 of the 2006 Finance Act, Article 109 of the 2009 Finance Act and Article 80 of the 2010 Finance Act.

The tax instructions 5B-26-05, 5B-17-06 and 5B-17-07

The decrees of February 9, 2005, December 12, 2005 and November 13, 2007 issued for the application of articles 200 quater and 200 quater A of the general tax code relating to capital expenditure on the main dwelling and amending annex IV to this code

Sections 81 to 83 of the 2012 Finance Act

Financial aid for floor insulation from the REGIONAL, DEPARTMENTAL, and ANAH.

Some regions, town halls or the ANAH also subsidize the installation of photovoltaic panels by granting financial aid. Find out more directly from these administrations or from your ESPACE INFO ENERGIE.

A VAT REDUCED TO 7% FOR HOMES OLDER THAN TWO YEARS.

AN INVESTMENT THAT QUICKLY PAYS FOR ITSELF THANKS TO THE ENERGY SAVINGS MADE:

You reduce your energy consumption for heating your home.

This can represent several hundred euros per year.

Floor insulation: environmental impact

Environmental impact

THE HUNT FOR WASTE

By insulating the floors of your home, you limit heat loss from your home.

Your heating needs will be reduced as a result.

A good insulation is the guarantee of the control of its energy consumption.

The energy thus saved is as much energy to produce and as much greenhouse gas avoided.

The environmental impact is then immediate and lasting for many years.

BACK TO NATURE

Many manufacturers now offer completely ecological insulation materials made from natural products such as sheep wool, wood, etc…

Renewable materials with very low environmental impact, a way to become a little more Eco-Citizen.