How to properly insulate the roof of a house: key points methods

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

One of the main conditions affecting the comfort of a home or cottage is a warm, reliable and durable roof.It must be good to keep warm, protected from moisture, protected from the wind.In addressing this problem, how to insulate the roof, do not skimp on the materials used.The roof is exposed to harsh conditions, experiencing greater extremes of temperature, the effect of rainfall, significant physical exertion by the wind.


Highlights roof insulation↑

roof insulation is one of the important stages of heat insulation of the entire building.It was the final design of the structure performs a basic function of protecting the interior from adverse external influences.High-quality thermal insulation of the roof will provide tangible cost savings during further operation of premises, reduction of heating costs.After

about 20-30% of heat loss occurs through the roof.

When deciding on how to properly insulate the roof of the house, should first determine the function of the attic space.If the attic is not planned to do the living room, the inside of the roof insulation is not mandatory.In this situation, it should be well insulated attic floor only to protect the room from the top floor of exposure to cold and heat loss.In a situation where the attic is arranged Floor attic, insulation of the roof from the inside is a must event.

Warming of the attic
Warming attic performed if you intend to use it as a dwelling

method of work also depends on the roof construction and the stage on which insulation is made.The design can be sloped or flat, each of them has its own peculiarities when working.When choosing a method should take into account the current stage of construction as warm roof preferably at the design stage.The technology of work is the same for both the wooden building, and brick.

should be noted that prior to insulate the roof of a wooden house, you need to carefully examine all the details of the roof trusses for moisture, rot and signs of various injuries.Wooden structures necessary to process antiseptic heavily damaged areas should be subject to replacement.Elements of electrical wiring, under the roof, also require careful examination.

materials for thermal insulation of the roof at home ↑

modern market offers a huge selection of materials for the insulation, the most common include fiberglass and polystyrene plates, foam concrete, foam glass, mineral wool.Each type of insulation is characterized by different thermal conductivity, water vapor permeability, strength and other properties.Widely used mineral wool, favorably differs from other heaters on their qualitative characteristics.Their use is acceptable for most types of roofs.

mineral wool slabs positioned as a fire-resistant material having low thermal conductivity, good waterproofing and noise absorbing properties.They during operation hardly deformed.

How to insulate flat roof ↑

for flat roof insulation is used two ways:

  • principle with profile ceiling - the insulation is laid on top;
  • principle suspended ceiling - insulation egged on the inside surface of the ceiling.

Perform insulation works on the outside is easier and more convenient option.Please note a few highlights, including the need to highlight the ability of the support structure supporting the weight of roofing material and insulation.It is possible that warming on the basis of the ceiling with profile will be sufficient to achieve comfortable living conditions in the house.Priority works by this method is more appropriate in the circumstances.Operation of premises in the cold season will make a conclusion whether to make insulation from the inside, based on the principle of suspended ceiling.

for insulation from the outside of the roof, which has a flat shape, better use of basalt rock wool.The choice of quality materials is especially important at this stage, as well insulate the roof is not possible without this component.

Phased flat roof insulation occurs in the following sequence:

  • With vapor impermeable film is laid a layer serving as a barrier to vapor;
  • arranged over the film layer of the mineral wool insulation;
  • waterproofing It is placed in a coil coating of roofing material, synthetic materials;
  • Laying bulk material - insulation.
Thermal insulation of a flat roof outside
Insulation of flat roof outside

Important!If work is carried out in the period of precipitation, it is necessary to take into account that the waterproofing coating must immediately be laid on insulation, without allowing the latter covered by water, snow, ice.When large areas need to take measures to prevent precipitation on the surface of the roof.

Before starting work on the insulation of the roof, thoroughly clean the surface from dust and debris.In the presence of large irregularities may require alignment.Insulating panels are glued using a special cold mastic or adhesive.In order to achieve uniformity of the coating to be installed in rockwool with poluperekrytiem seams.Laying additional layer of plates is allowed to improve thermal insulation, with plate are located "in the Extension", and the joints are glued shut.Using this technology allows you to avoid "cold bridges".

Recently, the spread of the fire gets a method of laying a waterproofing.On the slab of rockwool is laying a cement-sand screed thickness of more than three centimeters.After the concrete becomes strong, the working surface was cleaned of dirt and excess sagging.The carpet is glued waterproofing under short-term exposure to fire, without altering its protective properties.Laying material is carried out with the imposition of ten centimeters, which provides strength and integrity of the coating.

How to insulate a pitched design ↑

pitched roofs of houses or cottages often serves as a basis for creation of the attic provides additional square meters of living space.For attic insulation inside to satisfy more stringent requirements.

insulated roof design called "roof pie" because consists of several layers: a ventilation circuit by coating a layer of waterproofing, another ventilation circuit (not always like it), and the insulating layer vapor barrier.

Устройство "кровельного пирога"
device "roofing pie»

Waterproofing helps protect the house from moisture.If water under the roof insulation starts to lose its properties, structures made of wood will rot.Further, the air under the roof insulation and the outside may be significantly different, the temperature difference is the cause of condensation of moisture in the air on the cold structures.Also, condensation may occur inside the heater, but the ventilation device allows to avoid loops.Under the influence of the supply air removes water vapor from the roof without condensation.The waterproofing layer covers the building joists and secured to them by means of staples.

Availability ventilation circuit on the roof is a prerequisite for its functioning.Admission of fresh air must be arranged through the gap located on the overhang of the cornice, extractor through the ventilation unit on the slope of a ridge.Note that all nodes must be ventilated design.Ventilation device does not cause any problems for conventional gable roofs.For roofs with intricate geometry of this task we are faced with certain difficulties, because the free movement of air interfere with a variety of obstacles: air vents, chimneys, windows and other structural elements.

next layer arranged insulation.The main characteristics of the material affecting the quality of the works on warming, are the thermal conductivity and stiffness.The material should hold its shape does not deform under the influence of environmental conditions.

Insulation of pitched roof inside
Insulation of pitched roof inside

layer of insulation is placed on the moisture vapor barrier layer that is attached to the rafters.As the material for its construction devices typically use membrane film.

final stage in the roof insulation becomes finish "roofing pie" from the inside.The finished surface should sheathe plasterboard or chipboard for further pasting wallpaper or perform other finishing works.

Video: detail of roof insulation ↑

roof insulation is an important part of the construction process, which allows to achieve comfortable living conditions.Proper execution of work will provide an increase in the term flawless operation of the entire roof structure, get rid of unnecessary repairs.