Noise roof of the house - raise the acoustic comfort of their homes

Noise roof - what material to choose?

competent selection of acoustic material requires a basic knowledge in the field of building acoustics.If you just listen to other people's advice, do not understand the essence of the process of absorption of sound waves, there is no guarantee of an effective solution to the problem of noise isolation.In order to choose the right material for insulation, it is necessary to pay attention to two key indicators:

• index absorption
• dynamic modulus of elasticity

absorption index shows what part of the total radiated sound energy material is consumed, that is, how effectivehe worked as a sound insulator.This quantity is evaluated by laboratory tests in the range of audio frequencies from 125 Hz to 4000 - mostly noise spectrum in residential buildings.

good insulation of the roof is only possible with the use of materials in which this parameter is less than 0.6. example, wood absorption index of 0.07-0.15, while the mineral wool - from 0.7 to 0.9.Foam, despite the good insulating qualities, in this series looks quite modest - 0.15-0.25.Therefore, it can not be recommended for sound insulation of the roof.

Dynamic modulus measured in MPa and characterize the elastic properties of the material.The higher it is, the worse the material absorbs sound.This is understandable, because the dense material better reflects sound than loose.For example, comparing the slab of glass basalt or with their modulus 0,045-0,25 with foam, which figure is from 0.5 to 1.3 can be inconclusive in favor of fibrous materials.

design soundproof roof house

pick up a good sound-insulating material, and we simultaneously solve the problem of thermal insulation, because any loose fibrous material, and retains heat well.However, it is now in question.After buying quality mater next step is to choose the optimal design for the installation.

main factors on which depends the roof insulation home, are:

• good acoustic isolation in the junction points to the rafters and interior paneling of the attic;
• gap between the sound-insulating material and enclosing the roof structure;

Accordingly, all the constructive-protection barrier must be made according to these two requirements.

installation soundproofing metal

The insulating material is typically set in between the rafters.On top of it is bordered by the crate, so the requirement to ensure the gap between the metal tile and soundproofed automatically.

However, insulation of metal will not work in full force, if we do not eliminate the influence of "acoustic bridges" - the rafters, which transmit vibrations to the roof lining of the walls of the attic.As a result, we get a large resonating surface and insulation will not be able to reduce its vibration.

solve this problem will help insulating gasket from any elastic material, ranging from the usual felt and ending with polyethylene foam.We will install the insulating strip on the rafters and drywall, paneling or OSB panels, which is sheathed attic, will not transmit the external noise in the house.

In conclusion, I want to mention another factor, which is not directly dependent on the house roof insulation, but which should be considered at the stage of roofing.

Faulty installation sheets leads to their deformation under the influence of temperature, wind and precipitation, causing rattling and squeaking.Therefore, to deal with this problem, it follows from the first screw, swirling in the crate.