Roof Vs Ceiling Insulation

It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow.

Roof vs ceiling insulation.

A very energy efficient enclosure results. While ceiling insulation is a simple job for a diy er s new or existing build roof insulation can only be installed during the construction of a new roof. Ceiling insulation sits on top of your ceiling plasterboard whereas roof insulation also known as roofing blanket sits directly against the underside of your metal roof. If you do need to install insulation in the roof assembly take into account some rules.

Box out light fixtures. Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house. See the department of energy s doe ranges for recommended levels of insulation below. Roof is the top most part of the structure of a part while ceiling is what you look at when inside a room roof protects the inside of the building from heat cold and rains while a ceiling is mostly for aesthetic purposes.

Image courtesy of d7 spray foam insulation houston tx. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. It s more effective and easier to install insulation on the attic floor than in the roof assembly. Water is insulation s enemy.

Check garage walls and ceilings that are adjacent to conditioned spaces. Unless in air conditioned attics insulation is typically installed on the ceiling plane not on the sloped roof assembly. For example cathedral ceilings built with 2x12 rafters have space for standard 10 inch batts r 30 and ventilation. Turn off the electricity then remove an electrical outlet cover for a view of exterior insulation.

Unvented hot roof design cathedral ceilings are also an option. Looking upward through the open ceiling if the exterior wall and roof deck assemblies both contain spray foam then a continuous insulation and airtight layer is established from the base of the walls to the peak of the roof. The hot roof design allows more insulation to be installed in the roof cavity as the need for a vent space is eliminated. Exterior walls and floors.

Check behind knee walls which are walls between living spaces and the garage or attic. Wall insulation is not suited for use in a ceiling cavity space and wall insulation r values would not be adequate for your ceiling area.