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We have a new construction in blocks on which we would like to bring back an external insulation and cladding knowing that inside we realized a insulation Placo® + wool semi-rigid ep. 120mm. What do you recommend as external insulation? Is it necessary to have an air gap between the block and the insulation?

If your house is "new", it is normally in compliance with the 2012 Thermal Regulation and normally does not require any additional insulation.
Mineral wools represent the best technical-economic ratio, polyurethane foams are the most efficient at given thickness, expanded polystyrene are the cheapest, wood wools are appreciated for their phase-shift qualities (summer comfort), insulation so-called "bio-sourced" present for some real ecological virtues... the choice is vast.
With cladding, the ventilated air gap is between the insulation and the cladding. The insulation must therefore be fixed against the support wall.

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Which insulation for exterior insulation?

FAQ - 💬

❓ What R-Value is best for exterior walls?

👉 R-13 to R-23Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy's (DOE) ranges for recommended levels of insulation below.

❓ What is used for external wall insulation?

👉 This barrier is attached to the outside of your walls in several layers. The main insulating component is normally made of expanded polystyrene (EPS), phenolic boards or mineral wool. EPS is most commonly used. This is the main insulation - it is normally made of either expanding polystyrene or mineral wool.

❓ What is the best insulation for cold weather?

👉 Fiberglass InsulationFiberglass Insulation This type of insulation material is widely available and comes in various shapes and sizes. For cold climates, Loose-fill Fiberglass Insulation is the best as it has an R-Value of 60.

❓ Should I use faced or unfaced insulation?

👉 Faced insulation is easier to install. This is because the insulation is held together by the paper vapor barrier, allowing the faced insulation to be rolled, moved, and stapled without falling apart. Unfaced insulation does not have the same cohesive strength, so it's more susceptible to tearing during installation.

❓ How thick should exterior wall insulation be?

👉 Essentially all home and building designs can accommodate ICF construction. However, the standard thickness of ICF exterior walls is 12 inches, reducing room sizes and minimizing the home's square footage.

❓ Is R60 too much insulation?

👉 Recommended R-Value Varies by State You need exactly as much as the area you live in determines. Here, where temps get pretty hot for much of the year, attics should have from R30 to R60 (average is R38). Those living up north want anything from R49 to R60. This helps insulate against the extreme cold weather.

❓ How thick should external wall insulation be?

👉 between 50 and 100mmThe thickness of the insulation needs to be between 50 and 100mm and is usually installed where there are severe heating problems or the exterior of the building requires some form of other repair work providing the opportunity of adding insulation.

❓ Can external wall insulation cause damp?

👉 Gaps in insulation will also lead to drastic temperature differentials, which can cause condensation to form where warm internal air hits the cold section of wall – ultimately leading to damp and mould issues.

❓ How do you insulate exterior walls from the outside?

👉 To add insulation to any exterior wall, holes are drilled between the studs of the existing walls. Then, spray foam, cellulose, or another form of loose-fill insulation can be blown in to fill up the wall cavities. Finally, the holes must be plugged up and refinished to match the rest of the wall.

❓ How do I Weatherproof my house for winter?

👉 Weatherproofing Your Home In 8 Inexpensive Ways

  1. Weatherproof your door and window frames to reduce cold air intake.
  2. Ensure storm windows are installed correctly.
  3. Add honeycomb cellular shades.
  4. Get a programmable thermostat.
  5. Create a door draft stopper.
  6. Snuggle your water tank with a water heater insulating blanket.

❓ Do you need vapor barrier with faced insulation?

👉 Since vapor barriers are only additional protection and not required to finish faced insulation, they are not always necessary. In fact, in some parts of the United States, it is better to not add vapor barriers as they can do more damage than good to your insulation.

❓ What type of insulation is best for exterior walls?

👉 Spray foam insulation is another popular option for exterior walls. Like fiberglass and cellulose, spray foam insulation is highly effective at keeping heat inside your home. However, it does this without any of the downsides associated with fiberglass and cellulose, such as shifting.

❓ What is external wall insulation?

👉 External wall insulation is fast becoming one of the most popular ways to insulate a home. It’s perfect for solid wall buildings, where cavity insulation is impossible and internal insulation would mean sacrificing too much space.

❓ Can you insulate exterior walls from the outside?

👉 Insulating exterior walls from the outside effectively can be harder than it looks... Fitting extra insulation to an older home when renovating can be a great idea, but when insulating exterior walls from the outside take care to do it right. Ecohome investigates the easiest ways to retro-fit insulation to walls.

❓ What are the different types of insulation?

👉 Loose-fill and blown-in types of insulation include fiberglass, cellulose, and mineral slag or rock wool. It conforms to any size or shape space without disturbing the structure or finishes and is great for filling irregularly shaped areas, especially those around obstructions like pipework in exterior walls.


Video Instruction: How To Install Styrofoam Insulation On A Home's Exterior