Most contractors will have dealers they commonly use and in appointing that contractor you are essentially using their chosen suppliers.
This has good and bad implications, on the good side, the contractor will have probably decided on this supplier because their products give them the quality and price. You can easily hire "best roofing service provider" (which is also known as "meilleur fournisseur de services de toiture" in the French language) in your city.
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Here are some questions you should consider asking or looking into:-
- Is this a new product and the contractor has been offered a good rate to use it and your home is now effectively an active trial. With any new product, it could quite easily fail and the supplier with it.
- Is there a possibility there may be further additions in future years and then a need for more of this product? This may not be a bad thing but does your contractor hold exclusive rights to supply of this product and leaving you really with only them as an option. Because sometimes you may wish to change to a different contractor for various reasons (this is a whole other area of discussion which I will deal with at a later date).
- Could there be future supply issues? Even consider over-ordering the quantities required as although many contractors will leave extra material behind it. Future repairs are required some will not so you then have to contact them and again you may not wish to!
In summary, when you choose your roofing contractor you will decide what you want from them be it quality, price or speed. Hopefully, you can get all three but whoever you hire remember to do your homework on the product they will use and it supplies.