Reinsulating Roof From Outside

Box out light fixtures.

Reinsulating roof from outside.

Insulation level are specified by r value. If anyone has a better idea or sees a problem with my idea i m all ears. The later is used in new construction as the interior board serves as an inner wall. Does anyone have any experience with this or know of a source for used insulated metal roof panels.

Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance. A site built ventilated sip roof sandwich adding exterior foam on an old roof is a good idea whenever a reroof is planned it is a once in 50 year opportunity to bring the house up to higher level of energy performance. I will need to insulate from the outside. Just make sure there is no rot in the roof deck before closing that all in with nice warm insulation.

The higher the r value the better the thermal performance of the insulation. Rigid foam board is just above the roof deck or an exterior insulation option. Exterior roof insulation retrofit vented roof september 17 2015 überroof. Adding extra insulation to the exterior walls of an older home when renovating or remodeling is a great way of improving a home s walls thermal performance and reducing energy use while reducing heating bills carbon footprint and improving a building s comfort level.

Install nailbase for cladding. Water is insulation s enemy. To make installation of the foam easiest screw a board over the very bottom of the existing roof edge. I m thinking insulated roof panels probably 4 with new metal over.

4 strap with 2x4s and then i was considering cross strapping with 1x4s to help create better cross ventilation as on the back of the roof there are skylights and then the. The table below shows what levels of insulation are cost effective for different climates and locations in the home. Install rigid insulation board in multiple layers with joints offset vertically and horizontally between adjacent layers. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be.

It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. 3 add r31 of foam to roof to create the correct inside to outside ratio of insulation as currently there are faced r30 fiberglass batts on the interior of the rafter bays. The foam insulation can be put directly over the shingles or the shingles removed if there is a weight consideration. This video shows you how to use knauf insulation rock mineral wool rmw for sarking insulation installed above rafters and covered with homeseal lds weather.

How to insulate house walls from the outside. This house is located in florida. R value is a measure of insulation s ability to resist heat traveling through it. Because old roofs were often framed with 2x6s.