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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 GCNgNRbZqL6LL4hgxv6xsA==

<SEC-DOCUMENT>0001140361-08-001330.txt : 20080114
<SEC-HEADER>0001140361-08-001330.hdr.sgml : 20080114
<ACCEPTANCE-DATETIME>20080114183141
ACCESSION NUMBER:		0001140361-08-001330
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080110
FILED AS OF DATE:		20080114
DATE AS OF CHANGE:		20080114

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTERFACE INC
		CENTRAL INDEX KEY:			0000715787
		STANDARD INDUSTRIAL CLASSIFICATION:	CARPETS AND RUGS [2273]
		IRS NUMBER:				581451243
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			0102

	BUSINESS ADDRESS:	
		STREET 1:		2859 PACES FERRY RD
		STREET 2:		STE 2000
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30339
		BUSINESS PHONE:		7704376800

	MAIL ADDRESS:	
		STREET 1:		2859 PACES FERRY RD
		STREET 2:		STE 2000
		CITY:			ATLANTA
		STATE:			2Q
		ZIP:			30339

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTERFACE FLOORING SYSTEMS INC
		DATE OF NAME CHANGE:	19870817

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PARNELL LINDSEY KENNETH
		CENTRAL INDEX KEY:			0001201033

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-12016
		FILM NUMBER:		08529533

	MAIL ADDRESS:	
		STREET 1:		C/O INTERFACE, INC.
		STREET 2:		2859 PACES FERRY ROAD, SUITE 2000
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30339
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-01-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000715787</issuerCik>
        <issuerName>INTERFACE INC</issuerName>
        <issuerTradingSymbol>IFSIA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001201033</rptOwnerCik>
            <rptOwnerName>PARNELL LINDSEY KENNETH</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2859  PACES FERRY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>OVERLOOK III, SUITE 2000</rptOwnerStreet2>
            <rptOwnerCity>ATLANTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30339</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-01-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>85000</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>156730</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">A substantial number of such shares are restricted shares subject to a risk of forfeiture under certain circumstances.</footnote>
        <footnote id="F2">This award is higher than the typical award in prior years because it is made pursuant to a three-year performance program.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Lindsey K. Parnell</signatureName>
        <signatureDate>2008-01-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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