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