The most effective insulation of the basement - outside or inside?

By Admin | Garden And Buildings / Construction And Repair
11 May 2016

As the saying goes: "The owner - a gentleman."That is why everyone decides for himself how to build, when, out of nothing.But if you deal with such matters can be yourself, in order to answer such questions: "Do I have to do the insulation of the walls and the foundation, and if you need insulation foundation outside, whether to do the same inside?" - Need opinionspecialist, because only trained professionals can look to determine the degree of "usefulness" in a particular case.And let's find out how best to insulate the foundation - inside or outside?


opinion of experts on options for basement insulation ↑

The majority of builders agree that the best way to insulate outside the foundation.Not to be unfounded, they cause eno

ugh strong arguments in favor of this method.

  1. Regardless of the type of insulation used and the type of foundation, external insulation to protect the foundation from frost, preventing the penetration of low temperatures inside the building.
  2. outer insulation has a positive effect on the quality of the concrete, and the design of the foundation in fact, saving their strength for years to come.
  3. also the outer insulation is an additional barrier to groundwater, helping to protect the waterproofing of the foundation from moisture.
  4. Apart from the lower part of the foundation of the outer insulation resists temperature changes that occur in the upper basement of the house at the change of seasons.

But there are times when the insulation of the foundation from the outside is not possible, then certainly no dilemma before the owner is not necessary and only one thing - to insulate the inside.In fact, the benefits are not so much, but to be honest, only three:

  1. Thermal insulation inside the basement positive effect on the microclimate of the cellar and the whole house.
  2. Internal insulation to protect the foundation from ground water.
  3. internal heater prevents condensation build up in the basement.

In principle, there are positive aspects, but there are also negative:

  1. Yet outside the foundation freezes.
  2. Due to changes in temperature and frost heave occurs deformation and foundation cracks around its perimeter.

What good is that the foundation you built so carefully, in a few years will start to crumble and fall apart?

As warm than the foundation inside ↑

So, you decide to spend warming of the foundation from the inside, it seems you had a good reason.For insulation the inner surface of the basement from the basement or sub-floor is best used penopolituretan, since it is much easier to work in a confined space and time for similar work will take much less.

insulation process itself is very simple - you need to spray polyurethane foam on the entire inner surface of the foundation, with the hooking part of the basement wall.For greater confidence in their actions in the same way, you can insulate the floor and ceiling.Then you definitely protect the basement from the cold and moisture.That should take place only after finishing work on the walls, ceiling and floor.

You can also use foam and extruded polystyrene.

Thermal insulation inside the basement
Thermal insulation foam from inside the house basement

Materials and Methods insulation outside the basement ↑

as insulating materials, in this case, you can use foam, expanded polystyrene and polyurethane foam.Last applied in the same manner as in the insulation inside the basement, just before spraying polyurethane foam, will need to do some preparatory work to expose the lower part of the foundations of the house.

Insulation of the foundation with polyurethane foam
Warming outside the house foundation with polyurethane foam

expeditious way - polystyrene insulation ↑

For insulation foam or polystyrene foam will need to release the entire foundation of the earth.To do this around the house dug a trench to a depth of foundation width of about 40-50 cm.Then the surface is carefully trimmed from the remains and leveled the ground (if, of course, necessary).On clean, dry wall is applied waterproofing, and then a special adhesive or bitumen mastic attached sheets of insulation.The joints between them filled with foam (this technique will protect the foundation from moisture).

Insulation of the foundation outside the building
Warming polystyrene foundation outside the building

Important: the upper sheets of insulation should be at ground level to rise by about 40 cm - is the protection and the foundation and walls of the possible rise of groundwater.

After all the work for gluing sheets of polystyrene foam or completed, you can start filling the trench.On its bottom is covered with a layer of sand (10 - 12 cm), then you can put a piece of insulation (but you can not put), after - a layer of gravel (60 - 70 cm), and then you can pour concrete, you can sleep in the same sand,and it is possible to roll up the asphalt.If you are a creative person and love all original and unusual, it is possible to decorate all stone or tiles.

Technology performance insulation boards with the help of insulation you can see in the video:

Providing insulation using expanded clay ↑

Another way of warming the basement from the outside - is the use of expanded clay.However, this method has already been partially goes into oblivion, as it is quite cost and inefficient, although our parents in the construction of houses to use it.

process of expanded clay insulation in many ways similar to the insulation foam.Digs a trench width of not less than 1 meter to the full depth of the foundation.At the bottom of the trench laid a waterproofing material, and fall asleep on top of expanded clay granules.The layer should be thick enough, because expanded clay has a very weak thermal insulation properties.Over haydite laid roofing and poured sand or earth.

External insulation of the foundation of expanded clay
external insulation of the foundation expanded clay

If you decide to save at work and spend foundation insulation with their hands, you can use for this purpose is not only modern materials, but also those that were used by our ancestors.However, the good of straw, peat, leaves or pine needles will not be enough, because if these are available, the natural "insulation" really helps to combat cold and frost, unless the person would look for a replacement?

Warming foundation, what would you say no, it is necessary in any case, because the weather conditions in Russia is so unpredictable that even the weather forecasters are not able to answer the question of what awaits us tomorrow.Even if you live in Sochi and the Krasnodar region, where the temperature is generally remained stable near zero, do not risk, and the loans of their home, or then it will be too late.