Exterior Roof Insulation Retrofit

Install rigid foam on the roof.

Exterior roof insulation retrofit.

Choosing details and materials. More insulation on the exterior is good. A site built ventilated sip roof sandwich. Article by william smith.

Install rigid foam over the walls. Performance imperatives for high r value roof retrofit using insulating sheathing above the roof deck plus cavity insulation in roof framing. 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. Because old roofs were often framed with 2x6s.

Strip siding and roofing. Not only do we withstand hail damage but our roof boards maintain their bond to the roof membrane lowering the likelihood of a catastrophic roof failure. Exterior roof insulation retrofit vented roof march 2020. Exterior roof insulation retrofit unvented roof covering the roof of an old house with a blanket of insulation makes the house more comfortable and it cuts energy use.

Exceptional dimensional stability and rated for extreme hail rockwool stone wool insulation roof boards have meet both the fm severe hail and the ul 2218a standard for impact resistance. One of the main benefits of tackling an insulation retrofit on the exterior of buildings is that it provides continuous insulation around the envelope of the building. Foam roofing roofing felt types of insulation sips panels roof panels rustic modern cabin roof sheathing hip roof. To create continuous insulation spanning the enclosure installation on the outside of the wall assembly is the most effective explains nrel.

How to insulate house walls from the outside. Over the foam you will need something to nail the roofing to usually a solid sheet of plywood or osb. It may look easy to go buy some packs of rigid insulation panels down at the. Flash windows over rigid foam.

The following measures are necessary to ensure high levels of performance for this roof retrofit strategy. Install housewrap and roof underlayment. People also love these ideas. It makes a lot of sense if the rafter cavities are already insulated and it is most affordable when the roof needs replacement.

To save a step i would recommend using a nailbase panel foam preadhered to osb or sometimes plywood on one side only see photo facing page.