Exterior

Better Homes and Gardens: Masonry and Concrete
Collection of step-by-step tutorials with diagrams for building and finishing several types of masonry walls. Covers pouring wall footings, planning brick walls, building garden walls, applying stucco, working with mortar, and building forms.
http://www.bhg.com/bhg/category.jhtml?categoryid=/templatedata/bhg/category/data/Hie_Basics_MasonryAndConcrete.xml

Buildeasy.com
Collection of free plans and step by step tutorials with an emphasis on outdoor structures. Also includes a question and answer forum.
http://www.buildeazy.com/

Easy2.com: Insulating an Unfinished Attic
Step-by-step guide with diagrams, an animation, and an explanation of the importance of proper air flow.
http://www.easy2diy.com/cm/easy/diy_ht_index.asp?page_id=35720160

Exposed Aggregate
Illustrated step by step guide to exposed aggregate concrete finishing.
http://members.shaw.ca/bomr/ExposedAgg.html

The Fence Doctor
Brief FAQ on fence issues; including material selection and installation.
http://www.78fence.com/FAQ/

Fine Homebuilding - Roofing
Articles on sheathing, laying out shingles, retrofitting skylights, and sizing gutter systems.
http://www.taunton.com/finehomebuilding/pages/fh_feat_roof.asp

My DIY Projects
Homeowner details renovation of the exterior pointing, vertical hung tiles and a bay window.
http://www.simonawhite.pwp.blueyonder.co.uk/DIY.html

Picnic Table Plans
Dimensions, plans, and instructions for building from scratch.
http://www.bconnex.net/~zirgo/picnic.html

Roof Help
Articles on maintenance, repair, and replacement. Illustrated tutorials on determining slope and re-roofing.
http://www.roofhelp.com/HowdoI.htm

Roofing Glossary
Glossary with short descriptions for many roofing terms.
http://www.needhamre-roofing.com/Glossary.htm