Insulation of the foundation polystyrene - how to get it right

By Admin | Construction & Tips
13 April 2016

It's only going to build a house, it is worth thinking about how to safely and efficiently insulate and protect from moisture his future foundation.As a rule, the extra money and time is not available.That leaves a lot "for later" is so important.Construction of the house is coming to an end, and "things are there" - non-insulated foundations and remains intact.

takes several years, and it is clear that an error is made, which adversely affected the entire load-bearing structure of the building.We should take care of the basis of this design before, but now there is only a sad shrug.Insulation of the foundation polystyrene - a popular modern thermal insulator, is the most practical and effective way to basement insulation.Today we tell about how to make an insulation by means of this material including the preparatory work and the process of warming.

How to insulate the foundation polystyrene


  1. clean and align the foundation
  2. Protecting the foundation from
  3. Making foundations warm
  4. Protecting insulation
  5. Video: Warming foundation - Part 1
  6. Video:Insulation of the foundation - part - 2

clean and align the foundation

When our foundation of the house is ready, you can begin to clean up the cap.Armed with a rough synthetic brush and begin to pick out of the fine pores of the foundation every single grain of sand and dirt particles.Working up until the surface is sufficiently clean.

As a rule, the foundation not only the walls are not very smooth, but the corners are far from ideal.If the differences are large enough foundation, the foundation to make a geometrically correct, you can align the surface of the lighthouse.To this end, through a meter and a half from each other it is necessary to fix the guide beacons.Now you need to prepare the mortar, for which we take 4 parts sifted sand and 1 part cement brand M500.Dilute the mixture with water until the consistency is not very thick dough, we put it on the wall with a trowel.Working from top to bottom.Keep in mind that if too much water weight will slip from the walls, unable to dry.

line the walls of the foundation should be in stages, each time giving time for drying the solution in less than a day or two.If the walls are not really broken, it will take only two layers - the top of which will serve for the final alignment of the surface.The smoothness of this layer can be given by a two-meter building are generally made of aluminum.Working with this tool, it is necessary to keep him on the wall in waves.Every 5 or 6, this operation is repeated.

In the case where the deviation from the norm of the walls is 2.5 centimeters or more, conducted by a reinforcing mesh-netting.It is attached to the wall brackets made of metal.However, you can do without the grid, taking, for example, is not very thick (8 to 10 millimeters in diameter) reinforcement rods.They are connected with each other by the binding wire.

done, foundation walls finally become smooth.Then we wait for about a month, so that all excess moisture has evaporated from the foundation.Now it's time to put a layer of a special spatula acro glue.This adhesive is suitable for use with porous materials, so they glue styrofoam plates to reduce the adhesion surface.Then arrange waterproofing.

Protecting the foundation from moisture

mainly for this purpose always use liquid bitumen, which is rolled around the roller foundation.Here are just working with this material is not very convenient.He has to constantly warm, otherwise it quickly solidifies, and then long melted.Causing the bitumen, it is necessary to wear a respirator or mask, since vapors are harmful substances.And after it difficult to wash.Hot showers with ordinary soap does not help - but the asphalt is easily dissolved with acetone.

You can, however, and sheets TECHNONICOL foundation isolate - this is the way to many are adopting, rejecting the bitumen at all.Technonikol glue ordinary gas burner.Mount these lists, of course, conveniently, only moisture they rescue many times worse than the bituminous coating.After all, the microscopic pores and cracks of the foundation will be able to cover only a good bitumen.Therefore, sometimes it is necessary first to apply the coating, and only the top - TekhnoNIKOL.

sale bitumen usually in the form of bars.They need to melt, which takes the barrel of the metal volume 200 liters under her bottom enclose a few bricks to make a gap for heating.Besides bitumen bars, poured into a barrel of used engine oil (or diesel or gasoline).It gives the composition of the desired flexibility, allowing the cold bitumen layer will not crack.In 130 or 150 kilograms of bitumen take 50 liters of oil.The weight is applied to the underground part of the foundation, with the two sides and on the front side - on the ground of it.

Sheets TECHNONICOL sticking bitumen after curing.They must constantly smooth to squeeze out excess air.We are conducting work downward, driving the gas burner at a certain distance from the sheets.It is best to keep the distance of about 20 or 25 centimeters, or material poplavitsya.When all the sheets are glued promazhem their joints with mastic.That's all - now can be done with foam plastic insulation of the foundation.

Waterproofing of the basement
Apply bituminous waterproofing is possible with the help of a special roller or spray.


warm foundation for the beginning decide what material we insulate our home base.Usually used for this purpose polystyrene which is commonly referred to in the foam.It can be either ordinary or extruded, the foam having a dense structure.The second option is preferable, because the usual foam fragile, and it is easy to crumble, even when a small effort.And he has too large thermal conductivity, and by exposure to sunlight it is baked.

polystyrene obtained by extrusion, is not very high density - 35 kilograms per cubic meter.He is an excellent insulator and protects against moisture, is hard enough.Though he is in 2 times more expensive than regular foam, but in this case it is better not to save.Otherwise, you can pay as insulation.It should be noted that as the polystyrene plates are available with smooth side surface, and the projections for the tool joint.The latter are very comfortable - they form a plane with virtually no joints, so these plates longer in vogue.On the walls of the foam sheets should be stacked vertically to each other.

Apply the adhesive on the polystyrene
glued sheets of polystyrene foam can be with a special bitumen mastic, or by a conventional glue for polystyrene.

For mounting plates from expanded polystyrene need dowel-nails, so-called "umbrella", as well as plastic nails.In this way thermal bridges can be avoided.Dimensions dowels have to calculate on the basis of what we use polystyrene foam thickness.Thus, for the sheets 5 centimeters thick have to buy umbrellas length of 12 centimeters and a diameter - 1 cm.In one square meter of the plate must be 5 or 6 pieces of dowel.

We work with a drill-puncher.Since the walls are made from concrete, the rotation fit together with the impact mode.Drill centimeter diameter type SDS / plus should have a length of 16 centimeters.The drilled plate 5 or 6 holes - one in each corner, and one or two in the center.

Drill a hole under the poppet dubel

many holes do not need to.After that, all the way to score all the necessary plugs.Then comes the turn of the nails.By the way, after the installation of dowels needed to cover all the resulting dents acro glue.Dries it 6 hours, no less - and then, if the weather is dry and warm.

Horizontal stacking sheets
last sheet to do a lot of pieces, and therefore the joints, it is best to lay horizontally.

When we assemble a layer of expanded polystyrene, we can notice that the surface of the wall does not stand out above the foundation.Therefore, we begin to warm the wall so that the wall hung a little above the base of the house.A layer of insulator take not very thick - 2.5 centimeters or 3. Finally, add the layer of expanded polystyrene insulation is supposed to be solid, with no holes or gaps.If you take a plate with a locking compound to achieve this is simple - hard grappling with each other, they form an even layer.

Trim off any excess
If the foundation is above the hill, then with the help of anyone, even blunt hacksaw cut away excess foam polystyrene.

Protecting insulation

last stage of extruded polystyrene insulation of foundations - overlaying the reinforcing layer.It will be held at the same acro-adhesive.By the way, it is best manifested themselves like glue manufactured in Poland.He is inexpensive and keeps perfectly.For each square meter of the walls take on 3 or 4 kilograms acro-adhesive, though, whether accurately mounted plates.And the stock take a couple of bags on the safe side.

Stucco styrofoam
Stucco styrofoam performed just as it is done in the insulation of facades.

for fiberglass mesh reinforcement is used.And it must be a front that is applicable for external works.Grid for interior work, though less expensive, but can not withstand the weather, collapsing after 7 years, maximum - 10. Believe me - absolutely not worth the small savings serious unpleasant consequences that will occur.

mesh pieces are cut to length and glued lap, calling each other by 10-15 centimeters.This will prevent cracked, chipping and wire mesh on the sides.We should not forget that in order to reduce the number of seams grid should be placed horizontally with respect to the plane of the wall.Clay smear in two steps - first, by gluing the net to the plate, pass it on construction trowel.One day, at least, conduct Finish alignment.To reinforce the corners, install perforated metal corners.When will another day, take grater hard foam and smooths all roughness using sandpaper.Then after 3-5 days, applied to the surface primer.To do this it is best to take a soft cushion, not foam.

finished, carefully and meticulously inspect it.It is necessary to check whether we have that house wall protrudes over the wall of the foundation is not less than 3 centimeters.With such a ratio of the cap is formed a makeshift canopy that will not allow moisture to penetrate beneath the base and destroy it.The best option: the total thickness of the plaster and heat insulation on the walls - 3,5 cm.It is necessary to know at the very beginning, erecting walls.If we make a small displacement of the first row of bricks or blocks on the outer side, the desired result is achieved.

As you can see, the technology foundations of polystyrene insulation cooking resembles certain "layer cake".In this way possible to achieve quality of waterproofing and naturally insulation.It then remains only perform blind area around the building and do the finishing work.Cap can be finished, for example, the facade tiles, decorative stone oblitsevat or dye inks that are not afraid of water.

Video: Warming foundation - Part 1

Video: Warming foundation - part - 2

Add a question not received an answer to your question?It was not clear moments?
Ask our experts and visitors:

+ Add new question

Case material:
Heaters Penoplex - technical specifications, properties and fields of application
What better mineral wool or foam - differences and best scope
Wall insulation foam
Wall insulation foam hands - detailed instruction
Video selection: Winterizing a balcony or loggia
Video selection: Winterizing a balcony or loggia with their hands
The thermal conductivity of expanded polystyrene
What determines the thermal conductivity of expanded polystyrene
Vapor - a party to a heater it correctly laid
Vapor - a party to a heater it correctly laid and other features of the application of membrane
The warm walls inside the apartment or house
The warm walls inside the apartment or house and how to do it correctly
Styrofoam characteristics
Styrofoam - characteristics and selection criteria