Winchester UD Show Home

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Information about Winchester UD Show Home
Real Estate

Published on February 24, 2009

Author: bigbuilder

Source: slideshare.net

Description

Ever wonder why if universal design is just good design most builders don't do it? The simple answer is cost. A key component of universal design is having a zero-step entry into the home. Unfortunately, making it happen generally requires more excavation and concrete work, which gets pricey. See a side-by-side comparison of a zero-step entry and a traditional step-up entry.

A Comparison- Showhome’s Visit-able No-Step Entrance and a Traditional Homes’ Step-Up Entrance

Visit-able No-Step Entrance was Created by Thickening, Heightening and Recessing the Foundation

Foundation and Floor Framing for a Traditional Step–Up Entrance (left) and Showhomes’ Visit-able No-Step Entrance (right) 8" 12"

Detailed Comparison – Visit-able No-Step Entrance and Traditional Step-Up Entrance

Detail and Cost of Executing Showhome’s No-Step Visit-able Entrance Traditional Step-up Feasibility and Cost are not Nearly as Site and Lot Dependent Normal Depth of Excavation Normal amount of excavation Less likely to hit rock or as much rock Less likely to hit high water tables Less likely to require hung sewer and ejector pump for basement baths Normal Concrete Work 8” thick concrete foundation wall Normal height foundation wall and basement headroom Forming single concrete ledge Single row of foundation anchors No special membrane flashing required Normal allowable tolerances in concrete work Normal Sighting, Drainage and Grading Normal yard drainage Normal tolerance above localized yard flooding Normal tolerance and care in house sighting and grading No increase in possible need for retaining walls Normal Need for Weather/Durability Protection Normal step- up and traditional door threshold heights do not make a porch roof or other weather resistive measures nearly as essential Normal Flexibility for In-Process Flooring Changes Normal height thresholds provide flexibility for in- process finished flooring changes Visitable No- step Feasibility and Cost are Highly Site and Lot Dependent $$$ Deeper Excavation Excavate more earth –rebalancing of lot & site cut and fill Greater potential for encountering rock Greater potential for hitting high water tables Greater potential to have the basement slab elevation below sewer level in the street and require “hung sewer” and ejector pump for basement bath $$$ Extra Concrete Work 12” thick concrete foundation wall 20” taller foundation wall or less headroom in basement or combination of the two. Taller wall requires additional reinforcing bar Forming of two concrete ledges Two rows of foundation anchors Special membrane flashing to help protect recessed framing from decay or insect damage Reduced allowable tolerances in concrete work $$ Special Sighting, Grading and Drainage Drainage boxes and buried downspout extensions Reduced tolerance above localized yard flooding Reduced tolerance-extra care required in house sighting and grading Increase possible need for retaining walls Extra Need for Weather/Durability Protection Increase susceptibility to weather infiltration at threshold because of no step-entrance and low threshold. Requires a porch roof or other weather resistive measures to help ensure long term durability Limited Flexibility for In-Process Flooring Changes Low accessible threshold provide little tolerance for finished flooring changes Additional Dollar Cost Impact Code: $ > $500.00 < $1,000.00, $$ 1,000.00 < $5,000.00, $$$ > $5,000.00

Traditional Step-up

Feasibility and Cost are not Nearly as Site and Lot Dependent

Normal Depth of Excavation

Normal amount of excavation

Less likely to hit rock or as much rock

Less likely to hit high water tables

Less likely to require hung sewer and ejector pump for basement baths

Normal Concrete Work

8” thick concrete foundation wall

Normal height foundation wall and basement headroom

Forming single concrete ledge

Single row of foundation anchors

No special membrane flashing required

Normal allowable tolerances in concrete work

Normal Sighting, Drainage and Grading

Normal yard drainage

Normal tolerance above localized yard flooding

Normal tolerance and care in house sighting and grading

No increase in possible need for retaining walls

Normal Need for Weather/Durability Protection

Normal step- up and traditional door threshold heights do not make a porch roof or other weather resistive measures nearly as essential

Normal Flexibility for In-Process Flooring Changes

Normal height thresholds provide flexibility for in- process finished flooring changes

Visitable No- step

Feasibility and Cost are Highly Site and Lot Dependent

$$$ Deeper Excavation

Excavate more earth –rebalancing of lot & site cut and fill

Greater potential for encountering rock

Greater potential for hitting high water tables

Greater potential to have the basement slab elevation below sewer level in the street and require “hung sewer” and ejector pump for basement bath

$$$ Extra Concrete Work

12” thick concrete foundation wall

20” taller foundation wall or less headroom in basement or combination of the two. Taller wall requires additional reinforcing bar

Forming of two concrete ledges

Two rows of foundation anchors

Special membrane flashing to help protect recessed framing from decay or insect damage

Reduced allowable tolerances in concrete work

$$ Special Sighting, Grading and Drainage

Drainage boxes and buried downspout extensions

Reduced tolerance above localized yard flooding

Reduced tolerance-extra care required in house sighting and grading

Increase possible need for retaining walls

Extra Need for Weather/Durability Protection

Increase susceptibility to weather infiltration at threshold because of no step-entrance and low threshold. Requires a porch roof or other weather resistive measures to help ensure long term durability

Limited Flexibility for In-Process Flooring Changes

Low accessible threshold provide little tolerance for finished flooring changes

Conclusions A visit-able no-step entrance is part of a holistic system design process Designing and building a visit-able no-step entrance is highly situational dependent, and requires significant flexibility for homebuyers, design professionals and builders to execute properly The flexibility necessary to properly execute visit-ability is best provided for by voluntary visit-ability programs such as, Design for Life Montgomery

A visit-able no-step entrance is part of a holistic system design process

Designing and building a visit-able no-step entrance is highly situational dependent, and requires significant flexibility for homebuyers, design professionals and builders to execute properly

The flexibility necessary to properly execute visit-ability is best provided for by voluntary visit-ability programs such as, Design for Life Montgomery

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