Typically we are 4-6 weeks out from project approval to install unless we agreed on a different date. The Weather can and does affect our installs tremendously, it is not because we are unwilling to work in the rain, but rather when we work in the rain it causes excessive collateral damage to yards and ruts with mud. Also - although it may not rain on your projected install date, if we have several days of rain the week prior, it can push all our following projects out as well.
When we have a structure install deadline, we will typically look to schedule our site work 1-2 weeks prior to any structure install. In all of our years of doing site work for structures, we have not yet missed a deadline - we take them very seriously.
Even during the last 7 days prior to install, weather can and does throw us curves. Sometimes if we plan to be on-site first thing in am, it can be pushed out. I will always do my best to keep you informed via call, text, or email - whichever is preferred. We work with very heavy machinery and sometimes things break, hoses blow, or trailer tires decide to go flat.