Introducing the SIS Isolation Door
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| Core | Seals | |
| The heart of the door is the custom viscoelastic core designed for incredible mass with maximum damping. We achieve superior STC ratings with minimal thickness and weight. Many sound doors use 300 pounds of solid wood to get a good rating. Our door accomplishes the same level of performance with half the weight and over 1/2" thinner. | A heavy duty automatic door bottom is fully mortised into the bottom of each door. Installed and sized to fit to maximize the performance of the automatic door bottom. The sides and top of the door are custom fitted with a heavy duty adjustable door stop system that guarantees a perfect seal along the entire height and width of the door. | |
| Sizing | Jamb | |
| The standard size for our SIS Isolation Door is 3' wide with the standard 6' 8" height. We can custom build the door size to meet your requirements at no additional cost up to 42" in width and 7' in height. Unlike every other door manufacturer, custom sizes will not extend the lead time on the door you order from us. | Thick, quality, hardwood is used to create the frame of the door and for the custom sized door jambs. All door jambs are cut to fit the exact thickness of your wall. No need for jamb extensions with our doors. | |
Door Features
- Measures 2" for overall thickness
- Weighs 220 pounds
- Customized core to maximize mass and damping
- Door skins adhered using custom viscoelastic adhesive
- Constructed with advanced methods to eliminate the possibility of slab delamination
- Built to order with a maximum width of 42 inches and maximum height of 7 feet
- Standard birch finish for paint finish or stain finish (other wood finishes available at minimal cost)
- Includes 3 heavy duty ball bearing Baldwin hinges in a finish of your choice
- Includes heavy duty fully mortised automatic door bottom
- Automatic door bottom is adjustable without removing the door from the hinges or removing the door bottom from the door
- Includes full set of heavy duty adjustable door stops with low profile cover pieces for a finished wood appearance
- Thick hardwood material used so hinge screws won't strip from of the weight of the door
- Quality hardwood used ready for staining or painting
- Customized to fit the depth of your wall up to 12" at no additional cost
- Adjustable door stops: STC 52
- Automatic door bottom: STC 52
- Slab: Estimated STC 49 (Official testing coming soon)
- This door is not UL rated. Materials used to construct the door are rated for low flame spread and safe for general construction.
- Includes a 12-pack of TotalSeal Putty Pads (STC 61) to seal the perimeter between the jamb and framed opening
- Includes 1 tube of Green Glue Sealant to fill in remaining gaps around perimeter of the jamb
- Includes written warranty from Sound Isolation Store
Ours vs. Theirs
| SIS Isolation Door | Competitor's Acoustic Door | |||
| STC Rating: | STC 49 | STC 40 to STC 49 | ||
| Acoustical Seals: | Heavy duty, fully adjustable, and rated for STC 52. Low clearance adjustable stop covers included. |
Light duty or heavy duty, rated for STC 40 to STC 52. Bulky adjustable stop covers included. |
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| Weight: | ~220 pounds | ~300 pounds | ||
| Slab Thickness: | 2" | 2 3/4" | ||
| Slab Construction: | Dense interior with damping compound skinned with hardwood. Hardwood frame for lifetime support. |
Solid wood |
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| Jamb: | Thick hardwood jamb sized to fit the actual thickness of your wall up to 12" with no additional charge. | Thick hardwood jamb sized for 2" x 4" wall or 2" x 6" wall. Jamb extensions required. | ||
| Hardware: | Highest quality Baldwin commercial hinges with all finishes available. |
Heavy duty hinges included in brushed nickel finish only. | ||
| Finish: | Basic model is ready for stain or paint. Other wood species available at additional cost and little to no increase in lead time. |
Basic models are typically ready for stain or paint. Other wood species are limited and costly. Lead times are increased significantly with custom wood finishes. | ||
| Sizing: | Standard size is 36" x 80". Widths available from 24" to 42" at no additional cost. Maximum height of 84" at no additional cost. Custom sizes do not increase lead time. | Standard size is 36" x 80". Very few options for custom door widths and door height. Custom sizing increases lead time significantly. | ||
| Installation Kit: | Includes enough TotalSeal Putty Pads and Green Glue Sealant to seal the perimeter of the jamb to the framed opening. As well as written instructions and tips to ensure a successful installation. | Written installation instructions and tips included. | ||
| Price: | $2,275 base price plus minimal $250 flat rate freight | Typically $2,900-$3,800 plus freight |
Lead Time
Our SIS Isolation Door is the quickest shipping sound rated door on the market today. Shop around and you will discover lead times between 2 to 3 months from ordering with other door manufacturers. Some companies charge hundreds of dollars more to deliver your door within a month of ordering. Most of our doors are received by the customer within 2-3 weeks of ordering depending on transit time and complexity of customizations.
Warranty and Guarantees
From Sound Isolation Store:
Every door comes with an industry standard 1 year guarantee ensuring successful door function and a high quality slab/frame construction. As with all Sound Isolation Store products, we guarantee the lowest total price for our SIS Isolation Door. If you are quoted for a lower price from another manufacturer then we will beat that price. Guaranteed!
From Hardware Manufacturers:
The hinges shipped with the door include the Baldwin standard lifetime mechanical warranty. The automatic door bottom and adjustable door stops include a 3 year guarantee against defects in material or workmanship.


