It may make just as much sense to upgrade a home systemas to repair it or incur ever-more-frequent and expensive maintenance for an inefficient, obsolete or dying system. For a DIY project, it is also useful to establish limits .
![Rock wool Vs. glass wool](https://www.shubhinsulations.com/wp-content/uploads/2016/12/Rock-wool-Vs.-glass-wool-262x203.png)
It may make just as much sense to upgrade a home systemas to repair it or incur ever-more-frequent and expensive maintenance for an inefficient, obsolete or dying system. For a DIY project, it is also useful to establish limits .