How old should my house be before the roof needs to be done over.....

Depende da sua localidade e do tipo de madeira que foi utilizada. O clima também influencia no tempo de manutenção. Seria necessário contratar um especialista para avaliar as condições atuais e prever as futuras manutenções.

Has nothing to do with the age of the house. All depends on the type of roof you have and the quality of materials used and climate. What type of roof do you have so we can offer additional advice?

Most roofing should last at least 20 years but it really depends on the quality and installation. My house and roof are both 10 years old and I have no issue, yet!

It's not the age of the house, but the age of the roof to be the determining factor. Most shingles have a 10 or 15-year warranty. If there are a couple of layers of shingles, you may need to have the tar paper and shingles replaced next time.

I have found that whatever the warranty period is, subtract 5 years, lol.

Check for curling shingles, tar "granules" coming off, shingles lifting, soft spots when walking on the roof, holes, leaks inside. Some roofing companies, will come and do a check, and may add a bit of caulk if necessary.

Some people may not agree with me, but I don't let roofers shingle over old shingles. I have everything stripped down, and the plywood replaced where necessary.

BTW, more expensive isn't better. I overpaid for my 2nd last "20 year "roof, from a well-known, reputable company. It was an "eco-friendly" shingle that caused my roof to leak at the 10 year mark. Everyone else in the neighbourhood with that type of shingle, had the same problem. It went downhill from there.

I had a few quotes for a new roof. The one guy came out, and repaired all the problems without me asking (I wasn't home). I asked him what I owed him, and he wouldn't take a cent. He said his conscience wouldn't allow him to leave with all those problems. I ended up going with him. He wasn't the cheapest, but I really appreciated his work ethic. I paid less than 1/3 the price of the previous roof 10 years later, and I had much better service, and a much better product.

Here is a good checklist:

https://www.angieslist.com/articles/7-warning-signs-you-need-new-roof.htm

It depends on the type of roof and how long it has been since it was installed.

Thank u very much. U were very helpfull.