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How to insulate the veranda yourself: increasing the frost resistance of the summer structure

How to insulate the veranda yourself: increasing the frost resistance of the summer structure


In a harsh climate, the owners do their best to insulate the house or summer cottage. For example, a veranda is placed to protect the front door. This is a kind of vestibule, where cold outside air and warm air from the interior are mixed. But, when insulating a house, they do not always take into account that additional insulation will not interfere with the veranda. Otherwise, the unheated room will freeze and damp, which is why the finish will quickly become unusable. With the right approach, the veranda is insulated even at the construction stage. But it happens that the house was not built, but bought, and not in its best form. In this case, the insulation of the veranda from the inside with their own hands is carried out as needed. The main thing is to know where the cold creeps into the room, and to take all possible protective measures.

We eliminate the cold from the ground: we insulate the foundation

Usually the veranda is placed on the same type of foundation as the main building - monolithic concrete or concrete slabs. This material does not at all block the cold that comes from the ground in winter, therefore it is able to freeze through. Heat loss through the foundation reaches 20%.

There may be several options for how to insulate the base of the summer veranda.

Backfilling the internal space with earth or expanded clay

These options are possible only at the stage of the construction of the veranda, when foundation work is underway. Having removed the formwork, the entire internal platform is covered with earth or expanded clay. Land will be cheap, especially if there is a lot of excess soil left during construction. True, its quality of heat saving is low.

Expanded clay interlayer does not allow moisture and frost to sink into the concrete slab

Expanded clay has higher thermal insulation, but you will have to buy it. You can make a double layer: first fill the soil, and the second half - with expanded clay pebbles.

Pasting with expanded polystyrene

For Russian lands, where 80% of soils are heaving, external insulation of the foundation with expanded polystyrene is necessary. When thawing and freezing, such soils expand in volume and can deform the foundation. A layer of insulation will become an insulator that will relieve the base from direct contact with the ground, and also block frost. Expanded polystyrene plates are pasted over the entire outer surface of concrete, including the base.

For warming the veranda with your own hands, suitable: foam, extruded polystyrene foam and liquid polyurethane foam. All these are varieties of polystyrene, which differ in properties and method of application. The cheapest one - Styrofoam... It retains heat well, but will crack on moving soils. In addition, the foam pulls moisture from the ground, therefore, during its installation, an additional waterproofing layer is created (from the soil). Extruded polystyrene foam due to its dense structure, it does not saturate moisture, is not afraid of soil movements, has high frost resistance and has been serving for more than half a century. But it is expensive.

Before gluing expanded polystyrene, it is necessary to cover the entire foundation with waterproofing mastic.

Both versions of polystyrene are laid on the outside of the foundation, excavating it to the very base. In this case, the first row is placed on a gravel bed. Before laying, the foundation is coated with bitumen-polymer mastic (for waterproofing), and when it dries up, polystyrene foam plates are glued. The adhesive must be polyurethane. It is applied in dots or by smearing the entire sheet. The joints between the plates are also taken on glue so that there are no cold bridges and gaps for moisture penetration.

The newest way of external insulation - polyurethane foam spraying... It is brought to the construction site in the form of liquid components and sprayed onto the foundation with special equipment. After curing, the coating becomes dense, monolithic and very durable. In terms of characteristics, this material is not inferior to its extruded counterpart, but the cost of work is more expensive.

With sprayed insulation, the best quality of thermal insulation, because there are no joints

To keep your feet warm: floor insulation

In addition to the foundation, the floor is closest to the ground. Its insulation is a must if you do not want to see black spots of dampness in the corners.

Most often, concrete floors are poured on verandas. If you plan to heat the veranda using a warm floor system, then you should take care of it already at the stage of filling the subfloors. It is better to choose an electrical system that you will turn on as needed. The water floor can freeze at very low temperatures, and you will have to wait for spring to thaw, or dismantle the coating to warm up the pipes.

If there was an old tile on the veranda, then you can put insulation directly on it

Consider how you can insulate the floor on an unheated veranda:

  1. The entire subfloor is covered with crushed stone, and from above - with sand and tamped tightly.
  2. Reinforcement bars or a mesh are laid out (so that the concrete does not burst) and a concrete screed is made 5 cm thick.
  3. When the fill is tired, we create a waterproofing. The easiest way is to coat the screed with a water-repellent mastic. But it's cheaper - to lay sheets of roofing material and fasten them together with bitumen mastic (or warm it up with a burner and roll it in).
  4. On top of the waterproofing, logs impregnated with an antiseptic are mounted, and insulation is laid out between them. The best option is mineral wool with a foil-coated side. The foil does not release infrared radiation from the veranda, with which most of the heat evaporates. Rolls of insulation are placed after all the logs are installed.
  5. Can also be insulated with expanded polystyrene. Then the joints between the plates must be blown out with polyurethane foam, and when it dries, cut off the excess.

After that, boards or decking are laid, because both materials are warm. The board must be treated in every possible way against decay and painted with a protective compound. In addition, natural wood is very afraid of poor ventilation. To avoid dampness, it is necessary to make ventilation vents in the foundation, which should be located below the floor level.

Insulation is laid with foil facing up so that it reflects heat back to the veranda

Decking does not require ventilation in the underground, because it is not afraid of dampness and temperature extremes

Decking is also a board, but already processed with compounds at the factory. It is made of larch, which is not afraid of frost or moisture. Open terraces are lined with such material, so it is all the more suitable for a veranda. True, the cost of such a floor will not be cheap.

We put heat protection for the walls

The walls have a large area of ​​contact with the street, so we will consider how to insulate the veranda with our own hands from the outside and from the inside. Outside, insulation is performed if the wall material looks unpresentable. Those. it can be blocks, an old tree, etc.

External insulation

a) For wooden walls:

  1. We close up all the cracks in the building.
  2. We fill the tree with a vertical crate of beams with a step of up to half a meter. It is better to measure the width of the insulation and fill it exactly to its size. Then all the slabs will fit snugly against the crate.
  3. We insert mineral wool between the beams, securing the dowel-umbrellas.
  4. On top we fix the waterproofing film with a stapler.
  5. We decorate with clapboard or siding.

After laying the mineral wool, it is necessary to attach a waterproofing film to the crate with a stapler

b) For block walls:

  1. We glue the polystyrene foam plates on the walls with a special adhesive, additionally strengthening the dowel-umbrellas.
  2. We coat the same glue on the top of the slabs and fix the reinforcing mesh on them.
  3. After drying, we cover the walls with decorative plaster.
  4. We paint.

Choose an adhesive specially for laying polystyrene foam boards

All layers of the insulation cake are hidden under decorative plaster.

We warm ourselves from the inside

If the outside of the veranda looks aesthetically pleasing, and you do not want to change its appearance, then you can carry out internal insulation. But, before insulating the veranda from the inside, it is necessary to carefully seal all the cracks (in a wooden building).

Work progress:

  1. Stuff the crate.
  2. They fix a waterproofing film with a stapler, which will not let moisture from the street into the insulation.
  3. A metal frame is mounted from profiles, on which drywall is then fixed.
  4. The frame is filled with mineral wool.
  5. Cover the insulation with a vapor barrier film.
  6. Plasterboard is mounted.
  7. Apply a topcoat (putty, paint).

The distance between the metal profiles must match the width of the insulation sheets

We check the tightness of the installation of windows, doors

Large heat losses can come from windows and doors. If there are old wooden windows on your veranda, but you do not want to change them to double-glazed windows, then you need to thoroughly check their tightness:

  • First of all, we pay attention to the quality of the glazing of the veranda: for this we pull each glazing bead.
  • If they are cracked or loose, then it is better to take out all the glass, clean the grooves and coat them with silicone sealant.
  • Then we insert the glass back and apply the sealant along the edge.
  • Press with glazing beads (new!).

Walk with an ordinary metal ruler at the joints of the frame and the window opening. If in some places it passes freely, then these slots must be sealed with polyurethane foam. Check the front door in the same way. If you bought a non-insulated version, then you yourself will have to insulate the canvas from the inside and upholstery with leatherette.

Sealing the glass on both sides with sealant will make it windproof

All places where the ruler moves freely must be foamed.

Eliminate warm air leaks through the ceiling

It remains to figure out how to insulate the ceiling, because through it a significant part of the heat evaporates from the wooden veranda. Especially if the front door opens. A stream of cold air rushing inward instantly squeezes up warm air.

The best option is to lay out foil-coated foam polymer between the beams, which will simultaneously keep heat and prevent moisture from passing through.

You can also choose mineral wool, but then the roofing material is put in the first layer for vapor barrier, and on it - insulation plates.

Roofing material is laid under mineral wool for waterproofing

After such a thorough insulation, your veranda will withstand any frost, even if it is unheated.

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How to properly insulate the veranda from the inside and from the street - we keep warm in the extension

The country veranda (closed and open), if desired, can turn from summer to winter, i.e. from cold to warm. From the veranda, you can make an entrance hall, a corridor in the house, a full room or a winter garden, a greenhouse, in general, a warm room that can be used all year round. Therefore, it will be useful to learn how to insulate a veranda for winter living. Below is a step-by-step instruction with photos, drawings and diagrams.

How to insulate a veranda inside and out


Features of the extension

A veranda in a country house or in a private house is a room glazed from all sides or partially, which was either built immediately or added later to the already finished house. In summer, when it's warm outside, this is the best place to relax, unwind or have family gatherings.

Due to the fact that the veranda has many large windows, the whole circle will be at a glance - this will allow you to admire nature, sitting in an armchair or on a comfortable chair. And if the veranda is insulated, then this type of rest can be extended in winter. Plus, you can organize a beautiful winter garden or greenhouse.


Choosing a material for insulation

This procedure can be performed independently; it does not require special repair qualifications. In addition, a high-quality insulated veranda is protected from the appearance of mold, fungi and black spots, which lead to warping of the wood and simply spoil the appearance of the room. Even before the start of thermal insulation work, you need to make sure that the windows and doors in our extension do their job well - they do not have cracks, cracks in the window panes, they fit tightly to the frame, etc. If frosty drafts are walking on the veranda, no insulation will help her.

It is easiest and cheapest to buy foam sheets, but they have a significant thickness (up to 12 cm), thereby significantly narrowing the insulated room. In addition, it is difficult to cut polystyrene precisely due to its thickness; it will be necessary to provide a large margin for losses during cutting. Mineral wool roll insulation retains heat better and is much easier to install. You can buy premium materials for thermal insulation like Insulate, Isover or Ursa, with an outer foil layer or with double-sided metallization. They retain heat the best, but the price of such insulation will be more than tangible.

In conditions of severe frosts and large rooms, a combined version of insulation is used - first roll insulation is mounted on the wall, then sheet foam. The layered construction retains heat well even with a large veranda.

Yes, any isolation should be decorated outside! Not only for aesthetic reasons, but also for the sake of long-term use. Modern thermal insulation materials are not resistant to mechanical stress (however, the old ones cannot be called durable either). So you need to stock up on plywood, clapboard or wall panels for finishing the walls and ceiling of the insulated veranda. But with the floor, options are possible (see below)


Watch the video: How to cool your house on the cheap