The first layer on top of the plywood or OSB roof deck is underlayment. For this, we chose a self-healing ice-and-water membrane to protect the shallow-pitched roof deck. The tricky part in laying ...

Pitched roof – there are two options: warm or cold loft insulation. Flat roof – there are three options available: warm deck, cold deck or inverted roof. The simplest and cheapest roof insulation is ...