How To Insulate Your Roof From The Outside

To insulate above your roof sheathing the usual approach is rigid foam.

How to insulate your roof from the outside.

Source a stress skin panel company or prepare build your own. To make installation of the foam easiest screw a board over the very bottom of the existing roof edge. Installing insulation that acts as a vapour barrier on the outside will not serve you well except if you add enough of it to the point where about 2 3rds of the total insulation is on the outside. Split your insulation so half goes in front of and half goes behind electrical wires.

In new construction adding insulation on the exterior of the basement walls will do the following. Insulating an existing metal roof from the outside 1. Either eps or polyiso would be more environmentally friendly. Compressing insulation reduces its.

With interior insulation the entire space between the rafters is filled with insulating material and then covered with a plasterboard or wood panel finish that is then painted or wallpapered. But insulation from the outside or sarking has its advantages. I would start with determining the age of the structure. You must determine the load limitations on the existing roof trusses and understand they may require augmentation to.

At that point what you are doing is building a r e m o t e wall read more about that here. Minimize thermal bridging and reduce heat loss through the foundation protect the damp proof coating from damage during backfilling provide some protection against moisture intrusion make the. Fill the stud cavity from top to bottom and side to side. The most important steps you can take.

However xps is the least environmentally friendly option because it is manufactured with a blowing agent with a high global warming potential. The foam insulation can be put directly over the shingles or the shingles removed if there is a weight consideration.