R value is a measure of insulation s ability to resist heat traveling through it.
Reinsulating roof from outside.
I m thinking insulated roof panels probably 4 with new metal over.
The later is used in new construction as the interior board serves as an inner wall.
It may look easy to go buy some packs of rigid insulation panels down at the.
This house is located in florida.
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.
Insulation level are specified by r value.
Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance.
The higher the r value the better the thermal performance of the insulation.
Install rigid insulation board in multiple layers with joints offset vertically and horizontally between adjacent layers.
Water is insulation s enemy.
Rigid foam board is just above the roof deck or an exterior insulation option.
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.
It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow.
It typically has 3 variations.
The foam insulation can be put directly over the shingles or the shingles removed if there is a weight consideration.
Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
If anyone has a better idea or sees a problem with my idea i m all ears.
Does anyone have any experience with this or know of a source for used insulated metal roof panels.
Because old roofs were often framed with 2x6s.
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.
Just make sure there is no rot in the roof deck before closing that all in with nice warm insulation.
I will need to insulate from the outside.
To make installation of the foam easiest screw a board over the very bottom of the existing roof edge.
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.
Install nailbase for cladding.
Exterior roof insulation retrofit vented roof september 17 2015 überroof.
Box out light fixtures.
