Silo Structure - Need clarity on links & number of tiers
I am building a Silo site and understand the basic philosophy about separating the site into different categories, 
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in which the content in each category doesn't link to any content in another category, to help give each category title (category keyword) lots of link-juice.
 
However, I have what you could describe as a 4 Tier site, and I am wondering if this is one tier too many. For example:

TIER 1 ... Home page
TIER 2 ... Category
TIER 3 ... Sub-category
TIER 4 ... Wordpress blog posts

Q1: Does the 4 tier example above, have too many tiers for SEO purposes?

Q2: Should the TIER 1 / Home page include links to TIER 3 / Sub-categories

Thank you for reading
 
As far as I am aware, this should not be an issue. I'm not sure if "tier" is the correct use of terms here. Do you mean your site structure as in

//homepage
//homepage/category/
//homepage/category/sub-category
//homepage/category/sub-category/blogposts

In which case, the folder structure will not make a difference. Each page will be crawled individually and given it's own ranking - but the most important for page for SEO purposes, will still be your homepage. After that, the rest will all be treated as individual pages on your site.
 
Yes, your structure list is the same as mine. I think I may have adopted the 'Tier' terminology from SiteSell.com, I hear folks use it from time to time. 

I appreciate that each page will be crawled separately, but the Tier 4 keywords provide link-juice to the Tier 3s, and the Tier 3 & 4s combined provide link-juice to the Tier 2 keywords. 

So long as I can link to any other pages on my home page (and not just Tier 2 'Categories'), I will be happy to include links to 'Latest blog posts' which will be Tier 4 pages.
Thank you for replying.

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