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Are thicker curtains better?

Thicker curtains can often be better at blocking light, reducing noise, and providing insulation compared to thinner curtains. However, thickness is not the only factor to consider when choosing curtains. The material, number of layers, lining, and overlap are also important.

Are thicker curtains better?

Key factors that impact curtain effectiveness

When evaluating curtains, here are some key factors to consider:

Light blocking ability

  • Thicker fabrics tend to block light better. Options like velvet, wool, and blackout fabrics often have a tighter weave and prevent light from passing through.
  • Lined curtains also improve light blocking ability compared to unlined curtains. An inner blackout lining is ideal for maximum light blocking.
  • More overlap when curtains are closed prevents light leakage at edges. Curtains that overlap by 6-12 inches when closed perform better.

Noise reduction

  • Thicker and heavyweight fabrics like velvet help absorb sound rather than let it pass through. This reduces outdoor noise and echos.
  • Curtains with blackout linings also provide mass to absorb noise. The air pockets created between the layers absorb more sound energy.
  • Proper overlap and closure prevent gaps where noise can enter. Curtains designed to seal tightly when closed perform best for sound absorption.

Insulation ability

  • Thicker curtains maintain indoor temperatures better by preventing heat or cold from escaping. Dense fabrics like wool and velvet lined with cotton work well.
  • More layers create pockets of air that add insulating effects. Lined curtains perform better than single layer options.
  • Complete closure with overlapping or sealing curtains minimizes air leaks that reduce insulating ability.


  • Thicker lined curtains often have a more luxurious, elegant draped appearance compared to lighter curtains.
  • Too thick curtains can look bulky, dominate a room too much or not let enough light in during the day. Personal preference plays a role.

So when choosing curtains, consider all these factors rather than thickness alone. The best balance depends on your specific goals, room size, and aesthetic preferences.

How thick should curtains be?

There is no universal ideal curtain thickness. The best thickness depends on factors like:

  • Room size
  • Windows size
  • Noise or light control needs
  • Budget
  • Visual weight and appearance preferences

As a general guideline, here are typical thicknesses and when they work well:

  • Sheer curtains: 20-60 grams/square meter. Best for small windows, letting in light. Not optimal for insulation or noise blocking.
  • Light-filtering curtains: 61-120 g/m2. Provide some privacy and moderate insulation. Lightweight appearance suitable for most rooms.
  • Blackout curtains: 121-400 g/m2. Excellent at blocking light for media rooms or bedrooms. Can be heavy so work with larger windows and high ceilings.
  • Thermal/insulated curtains: 200 g/m2 or more. Best choice to reduce heat loss/gain and muffle noise. Often made of wool, velvet, dense cotton. Appear luxurious but require proper support.

Again, lining type and construction play a big role too in determining overall functionality. The most effective noise blocking and insulating curtains often combine thick heavyweight fabrics with blackout linings.

Sheer curtails offer minimal soundproofing or light blocking ability. While blackout thermal curtains excel at insulation and noise control. Choose weight and thickness depending on your specific needs.

Do thicker curtains fade faster?

Thicker curtains do not inherently fade faster than thinner curtains. What matters most is the fabric type and quality. Some key points regarding thickness and fading:

  • Thicker fabrics like wool, velvet, brocade, heavy cotton inherently hold up better against fading from sun exposure over years of use.
  • Lined curtains provide added protection since the outer layer protects the inner lining from fading. Good quality blackout and thermal linings improve durability.
  • Heavier fabrics sag less from their own weight compared to flimsier sheers over time. Less sagging reduces stress and wrinkling that can weaken fibers.
  • With proper side hemming and construction, thicker curtains maintain pleats well and do not tear as easily when opened/drawn. Sturdy seams prolong life.
  • In hot climates, thicker dark curtains can retain heat against windows causing material breakdown over many years. Proper ventilation helps.
  • Overall, well-made 100% cotton, wool, synthetic or blended fabrics in heavier weaves support pleats the best and resist wear. Durability exceeds 5 years.
  • Regular proper cleaning according to material guidelines improves lifespan regardless of thickness.

So focus more on quality construction and fabrics rather than thickness alone when gauging longevity. With periodic care, both sheer and thick curtains can last many years depending on level of light exposure and usage. Choose based on decorative needs, noise blocking and insulation ability.

Do thick curtains help keep a room warm?

Yes, thick well-made curtains significantly improve a room’s thermal insulation and ability to retain heat in winter. Some ways thick curtains help insulate rooms:

  • Thick fabrics like wool, velvet, and brocade have higher densities with tighter weaves. This prevents drafts from permeating while reducing convection to retain heat.
  • Lined curtains add further insulation value with trapped dead air space between layers. Blackout and thermal linings work well to prevent heat loss.
  • Complete closure with overlapping or enveloping curtains reduces gaps that allow warm interior air to escape.
  • Added mass of thick heavy curtains increases overall R-value and improves the room’s ability to stay warm naturally.
  • Proper ceiling to floor hanging provides more coverage with thicker materials that cannot be achieved using sheer curtains. Prevents more conductive and radiant heat loss through windows.
  • Heavy fabrics like velvet also absorb radiant heat from interior sources better and secondary re-release it back into a room during the day.
  • Insulated curtains help reduce drafts in older homes with leaky windows, providing noticeably warmer rooms in winter.

For best results, use lined curtains made of heavier fabrics that completely cover windows. Supplement with tightly sealed blinds or shades to further reduce convection. Make sure curtains can be fully drawn closed without gaps to maximize heat retention.

Do thick curtains help keep a room cool?

Thick curtains can help rooms stay cooler in summer. However, their effectiveness depends on material and proper use:


  • Better solar heat gain reduction – Thicker fabrics, especially layered or lined options, reflect more intense sunlight. This reduces radiant heat passing into rooms.
  • Increased insulation – Trapped air pockets between curtain layers slows hot outdoor air permeating indoors. Reduces conduction.
  • Reduced gaps – More overlap and complete closure minimizes convection currents of hot outside air entering rooms.


  • Heat absorption – Darker colors and opaque thick fabrics absorb and hold heat gained during days. Must be ventilated properly at night.
  • Airflow blocking – Closed thick curtains can prevent cross breezes across windows during the day unless windows are open behind them.
  • Night insulation – Benefits blocked if drawn open letting warmer air filter back in before sunrise.

Tips for success

  • Choose light colored fabric facing outdoors
  • Use white plastic or aluminum blinds behind curtains
  • Ensure curriculum layout allows windows to stay open with curtains drawn
  • Open windows at night to ventilate heat buildup
  • Close tightly during peak heat and sunlight hours

So thick curtains can help but have some limitations. Must be used properly in conjunction with shades and window ventilation for best results.

Key takeaways

  • Thicker curtains typically provide better noise blocking, light blocking, and insulation compared to thinner sheer curtains
  • Consider all factors not just thickness when choosing curtains: layers, lining type, fabric density, construction quality, ability to seal, and appearance
  • Room size, window dimensions, and decorative goals dictate ideal thickness more than specific thickness targets
  • Well made thick curtains do not fade faster, sag more or tear easier than thinner types with proper construction and materials
  • Both thick and thin curtains require regular proper cleaning and ventilation for maximum lifespan


Thicker curtains that fully cover windows clearly offer more functionality in terms of light blocking ability, noise reduction, and insulating effects. However, curtain choice still depends on striking the right balance for a given room based on window exposure, aesthetic goals, usage needs, natural light desires, and heating costs. Sheers cannot replace the light blocking ability of lined dense velvet drapes. But heavy drapes may sag over time, obstruct views, or overwhelm a small space meant to feel light and airy. Regardless of your curtains goals, be sure to follow material guidelines for cleaning, ventilation and hanging to maximize their lifespan and benefits over the years. With some smart compromises and care, any curtains can function better and for longer staying beautiful while keeping rooms comfortable.


  1. Do heavier curtains cause mold or mildew?
    Not inherently, mold depends more on humidity and ventilation. Ensure good airflow behind heavier curtains, clean as directed, and allow sunlight exposure when possible.

  2. What curtains insulate the best?
    Multiple layered options with thermal blackout linings, made of velvet, wool, thick woven cotton fabrics. Ensure complete and tight closure.

  3. How much do thick curtains reduce noise?
    Around 10-15 decibels typically. Blackout and thermal linings add further sound dampening. Approaches 20db reduction for loud outdoor noises.

  4. Should living room and bedroom curtains be different thicknesses?
    Usually yes, lighter filtered options suit brighter daytime gathering rooms. Heavier blackout curtains aid sleeping in darker bedrooms.

  5. Do thick curtains save on AC costs?
    Yes potentially 15-25% for rooms with sun exposure during hot periods. Solar gain reduction, conduction decrease and convection control all contribute to lower cooling load demands.

  6. Do thick curtains help reduce heating bills?
    Absolutely, easily 10-20% reduction. Lower loss of warm interior air while increasing insulation reduces natural gas use noticeably during winters.

  7. Do I need thick curtains in basement rooms?
    Not always necessary given less temperature extremes and sun exposure. Focus any investment on basement foundation wall insulation improvements first before window treatments.

  8. Should I choose thicker curtains if I already have blinds?
    Blinds already reduce solar gain and block some light/noise. Thicker curtains then help further insulate. Lighter filtered curtains likely suffice if room darkening not essential.

  9. How often should I vacuum thick curtains
    Regular light vacuuming when cleaning floors every 2 months removes surface dust and dirt. For deeper cleaning follow label instructions 1-2 times a year.

  10. Can you tailor thick curtains to make them lighter?
    Removing inner blackout lining will reduce weight and thickness. However other layers and fabrics likely need replacement instead of alteration to properly provide desired lighter filtration.

  11. I have vaulted ceilings – should I avoid thick curtains?
    Not necessarily. Go floor length rather than attempting to match ceiling height. Anchor track mounted curtains instead of free hang. Or break room visually into ceiling zones using rod lengths.

  12. How do I calculate curtain yardage needs?
    Height x Width x 2 is the standard equation.  But consider added layers of width from overlaps and potential shrinkage especially for lined thicker fabrics. Grommets and rings add further yardage.

  13. Should curtain support extend past window edges?
    Yes approximately 6 inches further on either side to allow for proper return spacing so curtains don’t bunch inward when opened. Ensure smooth side gliding.

  14. Do faux silk curtains provide any soundproofing?
    Very minimal. Acoustical absorption and performance relies more heavily on fabric density, Porosity, layers and weave tightness rather than imitation luxury appearances.

  15. Where should curtain seams be oriented?
    Vertical orientation allows more airflow which limits heat buildup issues for any thick curtains. Structurally stronger to handle frequent opening/closing as well compared to horizontal seams.

  16. How high should ceiling mounted thermal curtains hang?
    Within 18 inches of ceiling is ideal. Provides sufficient stacking space when open without leaving excessive convection gaps across middle portion of windows which undermines energy efficiency.

  17. Should I iron thick curtains?
    Iron on low heat as needed, but minimize direct ironing to avoid damaging heavy fabrics or linings over time. Steam refresh instead or lightly iron just hem allowances.

  18. Do back tab curtains provide good insulation?
    Back tab attachment leaves space gaps, losing efficiency. Go curtain panel with overlaps or sealed side tracks instead for true floor-to-ceiling insulation capability covering entire window.

  19. Where is the best place to buy quality thick curtains?
    Specialty drapery showrooms offer high-end customization with luxury fabrics and proper construction detailing. Or quality branded options found online through reputable retailers.

  20. What width rods should I use for heavy curtains?
    Sturdy 1-3 inch diameter standard or continental rods properly support heavier fabrics. Reduce sagging and curvature compared to smaller skinny rods.

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