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Guidance On Choosing Your Underlay

ACOUSTIC IMPACT SOUND REDUCTION
Higher the dB rating the better this is for impact sound reduction.
CARPET UNDERLAY OVER 40dB
Category dB Rating
TREDAIRE DREAMWALK PU Foam 46dB
TREDAIRE COLOURS RED Rubber 46dB
TREDAIRE COLOURS GREEN Rubber 44dB
CLOUD 9 CUMULUS PU Foam 43dB
DURALAY HALLMARK SUPREME Rubber 42dB
WOOD/LAMINATE UNDERLAY OVER 20dB
TIMBERMATE EXCEL Wood/Laminate 23dB
CUSH N WOOD Wood/Laminate 25dB
NOVOSTRAT SONIC GOLD Wood/Laminate 22dB
ENVOY ULTRA Wood/Laminate 22dB
THERMAL INSULATION
Higher the TOG rating the better this is for warmth.
CARPET UNDERLAY OVER 2.5 TOG
Category Tog Rating
ENVIROLAY 54oz Felt 3.42
ENVIROLAY 42oz Felt 3.25
CLOUD 9 CUMULUS PU Foam 3.10
CARPENTERS DEEPSTEP PU Foam 3.10
TREDAIRE DREAMWALK PU Foam 2.70
CLOUD 9 CIRRUS PU Foam 2.60
WOOD/LAMINATE UNDERLAY OVER 0.55 TOG
CUSH N WOOD Wood/Laminate 1.10
NOVOSTRAT SONIC GOLD Wood/Laminate 0.90
TIMBERMATE EXCEL Wood/Laminate 0.55
UNDERFLOOR HEATING
Lower TOG ratings are suitable for Underfloor Heating.
Category Tog Rating
Carpet Underlay
DURALAY HEATFLOW CARPET Rubber 0.75
Wood/Laminate Underlay
DURALAY HEATFLOW LAMINATE Wood/Laminate 0.35
NOVOSTRAT COMFORT SILVER Wood/Laminate 0.50
TIMBERMATE EXCEL Wood/Laminate 0.55
NOVOSTRAT SONIC GOLD Wood/Laminate 0.90
QUICK THERM Wood/Laminate 0.35
BUDGET UNDERLAY 
Excellent value underlays.
Category
Carpet Underlay
NOVOSTRAT GRAPHITE PU Foam
RELAY 8MM PU Foam
SPRINT 10MM PU Foam
ENVIROLAY 28oz Felt
ENVIROLAY 42oz Felt
DURALAY STEP 65 Waffle
Wood/Laminate Underlay
NOVOSTRAT COMFORT 2mm Laminate
NOVOSTRAT COMFORT SILVER Laminate
ENVOY ULTRA Laminate
FIBREBOARD Laminate
LAMI-MATE XL Laminate