We want everyone to be able to use this website, including people who use screen readers, keyboard navigation or zoom.
What we do
- We aim to meet the Web Content Accessibility Guidelines (WCAG) 2.1 level AA.
- Every form field has a label, text contrast is measured at 4.5:1 or better, and every page works on a phone and with a keyboard.
- Calculation results are plain HTML tables, not images.
Tell us if something doesn't work
If any part of the site is hard to use, email orders@altheimandsons.com with the page and the problem. We will fix it or give you the same information another way, such as by email or phone.
Last reviewed October 27, 2026.