House illustrations from A to Z

House illustrations Index for U - Z

Use the House illustrations Index pages to find specific images. For example, if you would like to find illustration images of "electrical wires", you could use the find feature of your web browser to search for "electrical" or "wires" on the House illustrations Index pages. Then you can use the House Illustration navigation menus for the specific category to find and view the image. Use the "Sort Gallery By" links above the illustrations to sort in ascending/descending order. You can also type the image description text and-or the image four-digit ID number in our site Search box to find the specific category for that exact house illustration image (A/C-Heat Pumps, Electrical, Exterior, Heating, Insulation, Interior, Plumbing, Roofing, Structure).

Click to go to section: U - V - W - X - Y - Z

U
UFFI Insulation Holes in Siding 1752
Undercoursing - Wood Shingles 0020
Underground Electrical Service 0514
Underground Oil Storage Tank 0824
Underpinning 0231
----- Timing of Concrete Pours 0232
Undersized Fill Lines for Oil Storage Tanks 0827
Unheated Areas - Insulation in Floors Above 1394
Unheated Houses - Frost Slab-on-Grade - Floating Slab 0206
Unvented Space Heater 1164
Unvented Wall Furnace 1159
Upflow and Downflow Furnaces 0753
Upper Sash Problems on Windows 2055
Upstand on Metal Valley Flashing 0061

V
Vacuum Relief Valve for Water Heaters 1560
Valley - Closed Cut or Half Woven 0063
Valley and Hip Rafter 0415
Valley Flashing 0053-0064
----- Asphalt Shingles 0056
----- Metal 0057
----- Cutting the Point 0062, 0087
----- On Roofs 0053-0064
Valleys Roof Slope 0054
Valve for Zone Control of Boiler 0871
Valve Gas Shut-Off 0724
----- for Water Heater 1573
Valve Leaks on Radiators 0896
Valve Tempering on Combination Heating System 0819
Vapor Barrier
----- and Air Conditioning Ductwork 1260
----- Incomplete or Wrong Location 1369
----- Location 1339
----- vs. Air Barrier 1332
Vapor Diffusion 1316
Vapor Retarders 1332 - 1340
Vaporization - Latent Heat of 1301
Variable Anticipator on Thermostat 0764
Variable Thermostat Anticipator 0764
Vehicle Doors for Garages 1865
Veneer Masonry vs. Solid Masonry 1753
Veneer versus Solid Masonry Walls 0395
Veneer Wall 0390 - 0399
----- Brick 0341, 0392
----- Masonry Tie Detail 0391
----- with Steel Lintel 0346
Vent and Fill Piping for Oil Storage Tanks 0825
Vent Connection at Chimney for Wood Stove 1057
Vent Connection for Wood Stoves 1055
Vent Connector
----- and B-Vent - Combustible Clearances 0770
----- Clearance from Plastic Supply Pipe 1554
----- Clearances for Wood Stoves 1049
----- Combustible Clearances - Wood Furnace 1022
----- Extending too far into Chimney 0773, 0987
----- for Wood Stove 1055
----- Length for Gas Furnace 0768
----- Loose at Chimney 0988
----- or Flue Obstructed 0989
----- Section Joints in Wood Furnaces 1023
----- Size on Furnace 0771
----- Slope - Gas Burner 0767
----- Slope for Wood Stoves 1054
----- Support and Slope for Wood Furnaces 1024
----- Support for Gas Furnace 0769
----- Wall Shields for Wood Stoves 1050-1051
Vent Dampers - Automatic on Gas Furnaces 0812
Vent Height - Minimum for Wall Furnaces 1157
Vent Location Problems for Oil Furnaces 0845
Vent Metal - Connection of Pieces 1000
Vent-Chimney Connections on Gas Furnaces 0772
Vented Rain Screen Principle 1763
----- Weep Holes 0393
Ventilating Roofs to Prevent Ice Dams 0007
Ventilation
----- Attic - Recommended Amount 1346
----- Helps Reduce Attic Heat 1341
----- Layer for Wood Shingles 0028
----- Prevents Ice Dams 1342
Ventilation-Cooling Air for Wood Furnaces 1014
Ventilator - Heat Recovery 1323
Venting Cathedral Roofs 1347
Venting
----- for High Efficiency Furnaces 0806
----- for Wall Furnace 1155
----- Gas Furnaces 0766-0774
Venting Homes 1349 - 1357
Venting Living Spaces 1349 - 1357
Venting Mansard and Gambrel Roofs 1348
Venting Roofs 1341 - 1348
Vents 0952
----- Power - Attic 1374
----- Roof - Types and Location 1343
----- Turbine 1344
----- Wet Insulation Below 1363
Vermont Slate 0030
Vertical Foundation Cracks 0250
Vertical Joints in Panel Siding 1796
Vertical Siding
----- Butt Joint Detail 1789
----- Strapping 1792
Vinyl Siding
----- Flashing below Windows 1803
----- J Molding around Windows 1804
----- Mounting Blocks 1802
----- Nailing too Tightly 1801
Vulnerable Areas - Roofs 0005

W
Walkouts from Basements 1873 - 1879
Walkway Steps - Exterior 1927
Wall
----- Bearing - Holes and Notches in Top Plates 0369
----- adding Insulation to Solid Masonry 1382
----- Analyzing Crack Size 0222
----- Assemblies 1745
----- Bearing and Partition - Identifying 0379
----- Bowing of Masonry 0357
----- Brick Veneer 0341, 0392
----- ----- Bowed in Older Home 0358
----- ----- Construction Detail 0390
----- ----- Detail 0277
----- ----- Masonry Tie Detail 0391
----- ----- with Lintel 0346
----- Cavity 0340
----- Condensation 1747
----- Crack Shapes 0224
----- Cracking
----- ----- caused by Surfaces Sliding 0350
----- ----- Common Locations 0234
----- ----- due to Brick Expansion 0361
----- ----- Lintel-related 0356
----- ----- Planes of Movement 0351
----- ----- Rotational Settlement 0233
----- ----- Types 0349
----- Drying Potential 1384
----- Extending above Ceiling Joists 0345
----- Furnace
----- ----- Clearances from Combustibles 1154
----- ----- Direct Vent 1158
----- ----- Firestop Spacers 1156
----- ----- Gas Fired 1153
----- ----- Minimum Vent Height 1157
----- ----- Unvented 1159
----- ----- Venting 1155
----- Gable for Roof 0420
----- Knee - Insulating 1365
----- Lateral Support for Masonry 0312
----- Lintel Loads
----- ----- in Masonry 0400
----- ----- in Wood Frame 0401
----- Loading Bearing with Lintel 0371
----- Marks due to Thermal Bridging 1326
----- Masonry
----- ----- Lateral Support 0344
----- ----- Bowing 0313
----- ----- Bowing due to Tie Failure 0360
----- ----- Veneer 0390-0399
----- ----- with Diagonal Brick Bond 0343
----- ----- with Wood Lintel 0347
----- Non-load Bearing 0330
----- of Chimney 0960
----- Offset Bearing 0388
----- over a Trimmer 0331
----- Parapet - Prone to Damage 1754
----- Partitions 0330
----- Plate Overhang 0373
----- Retaining 1930 - 1939
----- Rot Location 0380
----- Shields - For Wood Stove Vent Connectors 1050-1051
----- Sill
----- ----- Anchor Spacing 0281
----- ----- Anchors 0278
----- ----- Crushing 0283
----- ----- Gaps 0282
----- ----- should be above Grade 0279
----- Slope for Smoke Chamber and Fireplace 1083
----- Solid Masonry 0339
----- Stability - The One-third Rule 0263
----- Strength - Stud Sizes and Spaces 0372
----- Terminology - Brick 0342
----- Veneer versus Solid Masonry 0395
----- Weep Holes in Brick Veneer 0394
----- with Arch Outside and Wood Lintel Inside 0348
----- with Planters or Gardens against it 1751
----- Wood Frame 0366 - 0389
----- Racking Resistance 0376
Wall-Roof Anchoring 0409
Warm Chimneys are Best 0954
Water - Super Heated 0849
Water Blender on Radiant Hot Water Heating 0899
Water Cooled Air Conditioner
----- Missing Backflow Preventer 1231
----- Testing 1230
Water Entry at Electrical Service Entrances 0526
Water Flow
----- and Pressure in Supply Plumbing 1500-1511
----- can wear out Plumbing Pipes 1508
Water Hammer
----- in Plumbing System 1553
----- in Steam Heating 1118
Water Heater
----- 18 Inches from Polybutylene Pipe 1555
----- Dip Tube 1564
----- Drip Leg on Gas Piping 1572
----- Electric 1567
----- ----- Element Sequencing 1568
----- ----- External Tank 1563
----- ----- Floating Tank 1563
----- Gas 1562
----- ----- Piping Support 1571
----- ----- Shut Off Valve 1573
----- Ice on Gas Regulator 1569
----- in Garage 1872
----- Oil Fired 1561
----- Plumbing 1559-1664
----- Poor Gas Meter Location 1570
----- Recovery Rate 1566
----- Sacrificial Anode 1559
----- Scorching at Gas Burner 1575
----- Teflon Tape at Connections for Gas Piping 1574
----- Vacuum Relief Valve 1560
Water Leakage
----- at House-Wall Penetration of Electrical Service Conduit or Cable 0527
----- due to Soil Conditions 1881
Water Level Gauge for Steam Heat 1120
Water Level in Expansion Tank for Hot Water Heating 0881
Water Pressure in Boiler Set too Low 0863
Water Services Piping Separated from Sewer Pipe 1532
Water Sources Heat Pump - Open Loop 1275
Water Supply Factors 1500
Water Supply Pressure Drops as Flow Rate Increases 1501
Water Table - High 2074
Water-cooled Air Conditioning - Schematic 1214
Waterlogged Pressure Tank - Pump Short Cycling 1530
Watts per Square Foot Required for Electric Heat 1135
Web - Bracing of Compression Members in Trusses 0434
Weep Holes
----- Vented Rain Screen Principle 0393, 1763
----- below Grade 1749
----- for Retaining Walls 1939
----- in Brick Veneer Walls 0393
Weight of Water on Flat Roofs 1917
Well
----- Bladder Type Pressure Tank 1529
----- Bored 1514
----- Casings for Drilled 1516
----- Centrifugal Pump 1523
----- Deep and Shallow 1520
----- Draw Down Test 1512
----- Drilled 1515
----- Drilled with Submersible Pump 1527
----- Dug 1513
----- Foot Valve 1512
----- Location 1519
----- Piston Pump 1526
----- Pits 1517
----- Pressure Tank Components and Pump Controls 1528
----- Pumps - Types 1522
----- Shallow with Single Line Jet Pump 1524
----- Static Head 1518
----- Two Line Jet Pump 1525
----- Water Logged Pressure Tank - Short Cycling 1530
Wet Basement
----- and Crawlspaces 2067 - 2082
----- Clues - Part 1 2076
----- Clues - Part 2 2077
----- Interior Drainage System 2081
----- Problem Causes 2067
Wet Crawlspaces and Basements 2067-2082
Wet Insulation below Roof Vents 1363
Whole House Fan 1266
----- Inadequate Attic Venting 1267
----- with no Insulating Cover 1376
Wide Selvage Roofing 0103
Width of Stairwell 2028
Wind Scouring on Flat Roofs 0094
Wind Washing of Insulation 1328
Winders on Stairs 2026
Window 1713 - 1720
----- and Door Capillary Break 1816
----- and Door Frame Deformation 1818
----- and Door Putty (Glazing Compound) 1815
----- and Stair in Basement 2069
----- Awning and Hopper 1716
----- Bow, Bay and Oriel 1720
----- Casement 1714
----- Components 2038
----- Curved Tops 1719
----- Double and Single Hung 1713
----- Drain Holes 2040
----- Electrical Wire Clearance Around 0517
----- Energy Efficiency 2042
----- Exit Sizes 2057
----- Fall Protection 2039
----- Fanlights 1719
----- Faulty 2054
----- Flashing over 2053
----- Flashing Pan 2041
----- Flashings 1819
----- Frames - Thermal Breaks 2046
----- Glass Locations 2044
----- Glazing Types 2036
----- Gothic 1719
----- Installed Backwards 2052
----- Jalousie or Louver 1717
----- Leaks - Look behind Window Treatments 2001
----- Lintels Sagging or Missing 2050
----- Moves 1817
----- Mullion 1718
----- Window 1713 - 1720 - continued
----- Muntin 1718
----- Palladian 1719
----- Sash 1718
----- Shapes 1719
----- Sill - Capillary Break 1816
----- Slider 1715
----- Terms 1718
----- Types 2037
----- Upper Sash Problems 2055
----- Well Drain Problems 1925
----- Wells 1921 - 1925
----- ----- Damage 1923
----- ----- Extend or Add when Re-grading 1922
----- ----- Skylight and Solarium from the Inside 2036 - 2058
Wire - Damaged 0512
Wire and Fuse Sizes - Electric 0561
Wire Arrangement in Electrical Distribution Panels 0557
Wire Clearances
----- around Windows 0517
----- from Ducts and Pipes - Electrical 0594
Wire Fuse and Heater Sizing for Electric Heat 1136
Wire Sizes - Common 0529
Wire Support - Electrical within Steel Studs 0593
Wires not Well Secured to the House 0518
Wires Securement to the House 0518
Wiring
----- Exposed Electrical 0597
----- for Electric Space Heaters 1141
----- for Garbage Disposals 0627
----- for Multi-wire Branch Circuits 0616
Wood Appliance Below Oil Appliance on Same Floor Level 0994
Wood Beam
----- Bolting through Built-up 0303
----- Air Gaps at Ends 0275
----- Lateral Support 0309
----- Nailing of Built-up 0302
Wood Engineered for Floors 0332
Wood Fireplaces 1060-1095
----- Combustible Clearance Requirements 1062
----- Design Problems 1064
----- in Basements 1063
----- Three Kinds 1060
Wood Floors - Allowable Deflections 0273
Wood Foundations - Preserved 0216, 1811
Wood Frame
----- Bearing Wall - Top Plate T-connection 0368
----- Bearing Wall in Basement 0375
----- Party Wall 2015
----- Wall 0366 - 0389
----- Wall Lintel Loads 0401
----- Wall on Stone Foundation 0214
----- Wall Racking Resistance 0376
Wood Furnace 1013 -1033
----- (Downstream Series) - Add-on 1029
----- Add-on - (Divider Plate Method) 1030
----- Barometric Damper 1021
----- Boiler, Fireplace and Stove 1011
----- Combustible Return Ducts 1028
----- Combustion Air Damper Arrangement 1015,1016
----- Combustion Chamber 1018,1019
----- Components 1013
----- Duct Arrangement Allows Reverse Flow 1032
----- Duct Clearances 1027
----- Fan-Limit Switch 1026
----- Forced Draft 1017
----- Heat Exchangers 1020
----- Joining Vent Connector Sections 1023
----- not Downstream 1031
----- Thermostat Conditions 1025
----- Vent Connector
----- ----- Combustible Clearances 1022
----- ----- Support and Slope 1024
----- Ventilation-Cooling Air 1014
Wood I Joists 0442
Wood Lintel
----- End Bearing 0406
----- in Solid Masonry 0347
----- Inside and Arch Outside 0348
Wood Piers - Things to Look for 0266
Wood Retaining Walls 1934
Wood Roofing Application - Synthetic Ventilation Layer 0028
Wood Shake
----- Application 0024
----- Nailing Details 0025
----- Typical Lengths 0020
----- Typical Thickness 0020
Wood Sheathing Application - Spaced Planked Sheathing 0023
Wood Shingle
----- and Shake 0020
----- and Shake Siding 1784
----- Application 0021
----- Application - Synthetic Ventilation Layer 0028
----- Curling, Cupping and Splitting 0029
----- Edge Grain 0019
----- Flat Grain 0019
----- Nailing Details 0022
----- Nailing Details - Siding 1785
----- over Plywood Sheathing 0021
----- Siding 1786
----- Typical Lengths 0020
----- Typical Thickness 0020
Wood Siding 1779 - 1792
----- Cut Back Bottom 1787
----- Horizontal 1779
Wood Space Heaters 1034-1059
Wood Stairs
----- Rot 2030
----- Rot - Exterior 1831
Wood Stove 1034 - 1059
----- Advanced Combustion 1039
----- Catalytic - Bypass Damper 1041
----- Catalytic Combustors 1040
----- Clearance from Oil Tanks 1053
----- Components 1034
----- Convective 1038
----- Dampers - Testing 1059
----- Don't Confine 1036
----- Floor Protection 1043-1047
----- Unlisted - Combustible Clearances 1048
----- Vent Connector 1055
----- ----- at Chimney 1057
----- ----- Clearances 1049
----- ----- Drawbands or Adjustable Connectors 1056
----- ----- Slope 1054
----- ----- Wall Shields 1050-1051
Wood-Oil Furnace 1033
Wood-Soil
----- Clearances 0381
----- Contact 1924
----- contact for siding 1810
Woven Valley 0063, 0064

X
(there are no X index entries)

Y
Yankee Gutter 1895

Z
Z flashings 1798
Zone Control
----- with Pumps on Boiler 0870
----- with Valves on Boiler 0871

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