Why West Facing Rooms Overheat
Afternoon sun hits west walls when outdoor temperatures peak, so rooms on that side often run hotter than the rest of the house. West facing rooms need strategies that block sun before it enters, slow heat through walls and roofs and remove heat that gets in. Inland Sacramento summers bring long stretches of heat, which makes this a common complaint here.
The National Weather Service Sacramento office publishes local climate data for reference.
Exterior Shading First
Blocking sun outside the glass works better than inside blinds. Awnings, exterior shades, patio covers and trees all help. Because low afternoon sun comes in at an angle, side shading may matter too.
Window Glass for West Facing Rooms
Glass with a lower solar heat gain rating blocks more heat. The article on solar heat gain explains ratings. So replacing west windows may help more than replacing others.
Insulation and Air Sealing
Walls and ceilings in west rooms absorb heat all afternoon. Better insulation slows that flow. The article on insulation and air sealing explains options.
- Exterior shades or awnings
- Lower solar gain glass
- Attic and wall insulation
- Reflective roofing where suitable
Cooling Options
Ducts may not deliver enough air to hot rooms. The Department of Energy home cooling guidance describes fans, heat pumps and other options. A ductless unit can serve a single hot room.
West Facing Rooms and Interior Choices
Light colored finishes reflect more light. Also, cellular shades can slow heat inside. Then the room feels cooler.
Landscaping for Shade
Trees on the west side can shade walls and windows. Because trees take time to grow, plant early. The article on tree protection covers protecting existing trees.
Using Night Air
Cooler nights let owners flush heat from the house. The article on whole house fan explains one method.
West Facing Rooms and Furniture Placement
Furniture placement affects comfort too. For example, a desk or bed right next to a hot window feels worse than one across the room. So move seating away from west glass during summer afternoons.
Also, rugs and fabrics can fade in strong sun. Because of that, UV blocking glass or shades protect belongings as well as comfort.
West Facing Rooms and Costs
Simple changes cost little, such as shades or moving furniture. However, new glass or added insulation costs more. So try low cost steps first. Then measure the room temperature to see what still needs work.
Making a Plan
Measure temperatures, note sun hours and start with shading. Combining methods makes west facing rooms usable all day.