<p><strong>Notes</strong></p><p>it is assumed that the below items of works will be completed by Carillion&nbsp;if stated otherwise GDC can quote to complete:</p><ul><li><p>All electrics, inclusive of the supply of 3 number non switch spurs,adjacent to the 2 sump/pump systems.</p></li><li><p>All plumbing and heating</p></li><li><p>All joinery, inclusive of stud walls/ portioning, door frames and skirting.</p></li><li><p>All fixtures, fittings and furniture.</p></li><li><p>All ventilation and associated ducting.</p></li><li><p>All decorating.</p></li><li><p>All floor finishes (carpet, vinyl etc.)</p></li><li><p>All protection and cordoning off of works areas.</p></li></ul><p><strong>please see below remedial actions ( gathered from previous intrusive survey)&nbsp;and costs&nbsp;to complete waterproofing of the basement area. ( there are 2 no. options - option 1&nbsp;for only accessible areas only and option 2 - to waterproof the whole basement area)</strong></p><p>Thank you for inviting us to forward our survey observations along with our specification and quotation for the installation of a Delta cavity drain membrane waterproofing system, to the basement area of the above property.</p><p>In accordance with BS8102: 2009 we believe the area is to be used for habitable purpose and this particular grade is classed as a Grade 3. This grade assumes there to be a dry environment, and as such is what our design is based upon, unless otherwise requested.</p><p>To comply with BS8102, it is also noted that the floor should be a structural slab. Although we have not excavated the floor to confirm if it is, it was noted to appear to be of sound type. Should the client wish to proceed with the slab as it is however, the client will be assumed to accept responsibility if said slab should fail structurally in the future.</p><p>To be fully compliant with BS8102: 2009 the complete basement would require fully waterproofing. It should however be noted that compliance with BS8102 is not mandatory and that if the client was to cover only part of the basement, they should be aware that if problems should occur via those areas not treated, then they would be accepting full responsibility for any such failure. We have presently forwarded our specification to include only those areas noted on the attached sketch along with the appropriate quotation. As discussed last week we have also forwarded our quotation for carrying out a full waterproofing system to the whole basement, should this be required.</p><p>Please find below our break down of works to be completed by both you the client and us GDC along with appropriate quotation, inclusive of materials and labour.</p><p><strong>Recommendations</strong></p><p><strong>Works by GDC</strong></p><p>1) GDC to excavate 2 No. 1100mm x 1100mm x 800mm deep voids to floor slab in preparation to install Delta double pump/sump with alarm. 100mm reinforced concrete walls and floor slab are to be formed. Once the sump/pump systems have been installed they will be back filled with concrete. Rainwater discharge pipes are to be fed to the nearest appropriate rainwater drainage system, by clients own labour. Client also to introduce 3 No. non switch spurs within one meter of sump area ready for gdc&nbsp;to attach wiring from sump/pumps/alarm.</p><p>2) GDC to form a 75mm deep x 100mm wide channel into existing floor slab as indicated, to accommodate pre-formed channels to external perimeter walls, leading back to newly formed sump/pump areas. Rodding eyes are to be installed to positions indicated on attached sketch, for servicing benefits.</p><p>3) GDC to apply lime inhibitor to concrete floor, to prevent potential lime build up and possible failure of system.</p><p>4) GDC to apply Delta 8mm cavity drain membrane to all walls and uprights of light well areas, to full height. The membrane is to also be wrapped around underside of steels/beam areas and sealed tight, ensuring falls to perimeter walls. Membrane to be fixed utilising Delta waterproof fixing plugs and sealed at all joints utilising waterproof tape or rope. 25mm x 50mm pre-treated battens are then to be screw fixed to waterproof fixing plugs and a 12.5mm plasterboard with skim applied to finish.</p><p>5) GDC to apply waterproof slurry to flat soffit areas, lapped approximately 300mm down walls where membrane is to be applied.</p><p>6) GDC to apply Delta 8mm cavity drain membrane to solid steps, with ply treads and risers inserted to complete.</p><p>7) GDC&nbsp;to lay Delta 20mm cavity drain membrane to floor areas, sealed at all lap joints and to wall/floor junctions, utilising Delta Corner Tape. A 70mm fibrous screed is to be applied to all of floor areas.</p><p>8) All exposed areas of steel/RSJ which are to be wrapped in the cavity drain membrane are to be cleansed of any visible rust and primed, prior to applying a waterproof slurry.</p><p>9) Remove all resultant debris from GDC&nbsp;works and leave site clean and tidy.</p><p><strong>Please note</strong></p><p>Should the client request additional fixing points, then this item should be discussed prior to works commencing. We suggest a site meeting be arranged with all parties prior to commencement of the contract, to discuss a programme of works as appropriate.</p><p>&nbsp;</p><p><strong>Quotation options</strong></p><p><strong>option 1 - part of basement covered in sketch</strong></p><p>Our quotation for the above specification of works by GDC &nbsp;is as&nbsp;follows&nbsp;For the sum of &pound;122,678.00p + VAT.</p><p>&nbsp;</p><p><strong>option 2 - complete basement area.</strong></p><p>Should the client request the complete basement area be waterproofed, we have</p><p>estimated our quotation to be................................For the sum of &pound;292,323.00p + VAT.</p><p>&nbsp;</p><p><strong>Client to note</strong></p><p>It is the responsibility of the client to ensure the drainage is serviced/maintained regularly on a minimum 6 monthly basis. We will be pleased to discuss this with you if requested and recommend an appropriate servicing company</p><p>At present we are assuming there to be sufficient foundation for the floor to be removed to accommodate the drainage channel. Should it be found, not to be the case, then we will discuss an alternative approach with the client to agree, prior to works continuing.</p><p>Upon receipt of full and final payment, we will forward our <strong>10-year Guarantee </strong>for waterproofing works completed by GDC&nbsp;, protecting you against the unlikely event of penetration of moisture through our system.</p><p>An insurance backed guarantee CGS (Construction Guarantee Scheme) is also available upon request, for a one off payment if required. We await your instruction.</p><p>&nbsp;</p><p><strong>General Note</strong></p><p>Under no circumstances should the membrane system be punctured, without prior notice and agreement from GDC. Failure to comply with this instruction may negate the benefit of any guarantee issued.</p><p>Appropriate heating and ventilation is essential to any basement area. We will be pleased to assist/guide you on such systems if requested.</p><p>We trust the above to be of benefit to you. Should you feel we have misunderstood or misinterpreted your instructions, or require further clarification, please let us know immediately.</p>