Foil insulation for walls inside and out

The material is one of the types of insulation with the addition of a layer of foil.

The presence of foil significantly increases the insulating properties of any type of insulation. Being an excellent reflector, it is able to repel up to 95% of heat without releasing it from the room. Also, the addition of foil improves the waterproofing properties of insulation. It is durable, not subject to destruction by fungus, dampness and corrosion.

Various types of foil insulation are used for thermal insulation of floors, walls, ceilings, roofs, attics, and are used in thermal insulation of heating mains.

Types and cost

Foamed polyethylene

It is a multilayer material of a roll type, where aluminum foil is present on one or both sides. May also have a layer of glue under the protective film for ease of installation. It is used for insulation of all types of structures, as well as insulation of pipes, ducts, ventilation systems. Available in the range from 0.2 to 1 cm in thickness. The standard thermal conductivity of the material is 0.038 W / (mK)

Pros:

1. A thin layer of material does not reduce the usable area of ​​the room.
2. The flexible texture of polyethylene allows to insulate structures of broken and curved shapes.
3. Easy to install.
4. It is light weight.
5. It is characterized by high rates of thermal insulation.

Minuses:

1. Does not provide sound insulation.
2. Easy to tear.

Foiled Polystyrene

It is a polystyrene plate with an additional layer of foil. It is usually used when installing underfloor heating systems.

Pros:

1. It is light weight.
2. It is a good heat insulator.
3. Resistant to biological and chemical destruction.
4. Not suitable for insects and small rodents.
5. Practically does not absorb liquids.

Minuses:

1. The plate shape allows you to mount the material only on a flat surface.
2. The dense structure prevents air exchange in the walls.

Foil mineral wool

Available in the form of plates, cylinders and rolls of mineral wool 5-10 cm thick with a layer of foil. It is used more often for non-residential premises - attics and roofs, chimneys, baths, saunas, etc. The service life is 10-20 years, after which the insulation gradually coalesces, reducing the thermal insulation of the room.

Pros:

1. Resistance to temperature fluctuations.
2. Incombustibility.
3. The loose structure of the mineral wool allows it to be mounted on curved or simply uneven surfaces.
4. Good thermal insulation performance.

Minuses:

1. A high degree of water absorption, which leads to wetting of the material, the loss of its heat-insulating qualities, and in winter to freezing and violation of the integrity of the structure.
2. The presence of small particles in the glass wool makes it inconvenient to install - it is necessary to protect the eyes, respiratory organs and skin, and after warming, carefully clean the room and isolate the insulation from it.
3. Formaldehyde resins in cotton wool are considered to be carcinogenic, so it is important to prevent the room from contacting the insulation.
4. Such a heater has a significant thickness, i.e. with internal insulation it will significantly reduce the usable area.

Basalt wool

Also. like mineral, it is available in the form of sheets, rolls and plates. It is mainly used to minimize heat loss on the roof and walls. The composition includes a melt of basalt or other metamorphic rocks close to it in composition.

Pros:

1. Not combustible.
2. It has a relatively low price.
3. Not subject to decay.
4. Extremely unloved by rodents.
5. Resistant to chemical attack.
6. Due to the loose structure allows the walls to "breathe".
7. It has high sound insulation performance.

Minuses:

1. Although the basaltic component of cotton wool is non-allergenic, binders can cause individual intolerance.
2. It is inferior in terms of thermal insulation to most other insulation options.
3. Over time, cakes, which reduces thermal insulation properties.
4. During installation and operation, it crumbles and dusts.

Folgoizol

Foiled Isolon is a thin and flexible roll material., among the components of which are mineral filler, bitumen, rubber, antiseptic. It is used mainly in roofing works, for insulation of pipes, foundations, pools.

Pros:

1. The material can be painted.
2. The flexible form allows installation on uneven surfaces.
3. It is environmentally friendly, therefore it is used even in the food industry.
4. Waterproof, i.e. acts simultaneously as a material for heat and waterproofing.
5. Durable.
6. It can be operated in a wide temperature range without losing the quality of thermal insulation.
7. Not susceptible to decay, corrosion, fungus.

Minuses:

1. Relatively high price.

Price

Prices for foil insulation can vary depending on the characteristics and characteristics of the material, manufacturer, season, etc., but on average:

1. For polystyrene foam - from 200-250 rubles / m^2.
2. For mineral and basalt wool - from 100 rubles / m^2.
3. For polyethylene - from 20-25 rubles / m² for one-sided foiling, from 50 rubles / m² for bilateral, from 60 rubles / m² with one-sided foiling on one side and an adhesive coating on the other.
4. For foilizol - from 150 rubles / m^2.

Mounting technology

Materials:

• insulation;
• glue;
• masking tape / plain or foil tape;
• screws with plastic dowels;
• nails
• polyurethane foam;

Instruments:

• knife;
• screwdriver;
• hammer;

Stages of the work:

1. All types of insulation are mounted on a dry surface cleaned from any contaminants with embedded cracks. Polystyrene foam boards, in addition to all this, also need smooth walls. To do this, they should be leveled with plaster, and after it has completely dried (3-4 days), sand.
2. For the installation of mineral or basalt wool, a frame of wooden or metal battens is arranged in the room, the remaining heaters are mounted directly on the walls. If this is a self-adhesive polyethylene, then the protective film, material is carefully removed from it spreads over the surface of the wall, while swelling and the presence of air bubbles should not be allowed under the heater.
3. Styrofoam is better to install simultaneously on glue and screws. The glue is applied to the entire surface of the sheet, or partially - with large spots or wide stripes. Screws are screwed in the amount of 4 pieces per square meter. Insulation sheets are mounted from bottom to top and are staggered.
4. Polystyrene insulation is usually then plastered and painted either sheathed by siding or wood paneling.
5. All types of foil insulation are mounted butt-to-butt, gaps are glued with foil tape or sealed with mounting foam or heat-insulating mastic.

If the material has an adhesive base, then additional means for fastening are not necessary. For polystyrene foam, glue or screws are used, the roll insulation is fastened with small nails, or it is also planted on the glue. Mineral wool usually just fits snugly between the slats of the frame.

Tips

1. You can attach a piece of foil insulation in the space behind the batteryso that the heat from it does not go into the wall, but is reflected back into the room.
2. When working with foil polyethylene caution should be exercised, as material is easily torn even by hand.
3. To achieve maximum thermal insulation between the heater and the finish of the room it is recommended to leave an air space of 1.5 - 2 cm.
4. If the insulation has only one foil side, it should be turned inside the room.
5. Do not save on materials for insulation. Heating a cold house or changing a heater will cost more than once a perfect expenditure on quality material.
6. Any material should "get used" to the microclimate of the room, for this he must be allowed to lie down for at least a few hours.
7. Calculate the required material thickness simple formulas in regulatory documents will help.