Welcome to Kratt Lumber

Kratt Lumber Company was founded at a time when there were about a dozen other full-service lumberyards in town. Those other yards have disappeared over the years, but Kratt Lumber has survived and is now in the hands of a third-generation owner, Michael Kratt.

  • The Infinity Difference
  • Our Products
  • Hassle-Free Experience

The Infinity Difference

Infinity® replacement windows and doors are made from Ultrex fiberglass material so strong and durable it is superior to other window materials. Best of all, it makes Infinity products virtually maintenance free.

Advantages of Ultrex® Fiberglass

Strong, stable, durable and virtually indestructible, Ultrex is possibly the perfect material, creating windows and doors that leave other materials in the dust.

  • Patented mechanically bonded acrylic cap, virtually indestructible surface.
  • 8x stronger than vinyl, 3.5x stronger than wood.
  • 500x less thermal conductivity than aluminum.
  • Low thermal expansion (essentially the same as glass) for better seals, longer life.
  • Strength allows for narrow better looking profiles and more visible glass area.

Infinity Products are designed for the homeowner who wants low-maintenance replacement windows with the traditional appearance of a wood window.

Hassle-Free Experience

Infinity® makes your entire replacement window and door project simple and hassle-free. In fact our indepenedent infinity retailers offer a one-stop shop shopping experience, providing knowledgeable expertise from initial consultation all the way through full-service delivery and installation.

A local expert will give you a thorough in-home consultation or showroom tour of Infinity products and services.

A window replacement professional will measure your existing windows and doors for accurate replacement specifications.

You'll then receive a detailed project quote that you can review with your retailer and have all of your questions answered.

Removal of your old windows and doors is followed by convenient and professional installation of your custom replacement windows and a thorough clean-up of the area.

Schedule your FREE in-home consultation from a local expert today!
(608) 788-2600 Request Consultation Now


* Required field
Information will remain confindential.
Privacy Statement
Kratt Lumber Co.
1714 S 16th St
Lacrosse, WI 54601
608-788-2600
© 2014 Marvin Windows and Doors