Roofing can be an expensive affair. When the time comes and you need to replace the entire roof or most part of the roof then there are two options that you have. The first one is to remove the old roof, repair below the roof and then install the new roof. The next option that you have is to do a roof overlay which means that you install the new roofing over the old one, these options should be discussed with a licensed roofer. Having an overlay helps you save some money at that time but can be expensive in the future. Here are some of the reasons why you should avoid doing a roof overlay.
Installation becomes difficult
Installing shingles over other shingles can be difficult. If you remove the old shingles you expose the framing where the new shingles can easily be placed on the surface. It takes skill to be able to install the overlay on the existing roof which if not properly done can cause more harm than good.
If you are replacing a big portion of your roof or the entire roof and you decide to do an overlay you have added tons of weight on the structure of your roof. You should ensure that you know how much weight the framing you have can be able to accommodate. Adding so much weight on the roof can cause it to cave in and if not it can cause the structure of the roof to become weak. Doing the overlay might require that your house is reinforced for the structure to really hold which might cut on the savings that you are really looking for.
Covering up problems
When you decide to do an overlay, you cover the old roof which might keep the old problems of your roof covered up there. For instance, if your roof had some rotten struts, doing an overlay means that you cover up the rotten struts underneath there which can really compromise the integrity of your roof. Ensure that the problems under the old roof are taken care of before it is covered up. If the structure underneath is not strong then the nails that intend to keep the roof in place will not be able to hold.
With a layover, your new roof has a shorter life span than it would if it was installed on its own. This is because of the precarious nature of the roof and the fact that it is being installed on another roof that could already be compromised. It is therefore important to do a complete roof installation when looking to maintain the lifespan of the roof as given by the manufacturer because the conditions then allow it.