Measuring it is the only way to find out its r value.
Roof insulation dos and don ts.
If the insulation is at or below the level of the joists add more insulation.
Don t assume your home has adequate insulation.
Insulation don ts now that you have been advised on what you should do in order of ending up with a successfully implemented insulation project it is time to move on to some insulation don ts.
Firstly although some alternative insulation materials can do the trick and be less expensive such as cork or denim insulation please note that.
Do check your attic s level of insulation.
Do remove damaged insulation.
Replace it with new insulation.
It requires an expert and certified installer to do it.
Don t use insulation materials that are not approved for use in loft spaces.
Wet or compressed insulation has no value for keeping your home warm.
Attic insulation do s and don ts.
Use only certified and accredited companies to recommend the type of materials your loft would need for proper insulation.
Do not carry out loft insulation yourself.
Some insulation materials such as fiberglass do provide cheaper cost but not in the long run because they tend to produce air gaps that can reduce the r value of the insulation.
When using can foam insulation here are some do s and don ts to consider.