<p>The existing flat roofing above the front of the store is split into two levels and totals some 210 m2&nbsp;in all.&nbsp;Core samples showed that original felt roof comprised of a concrete substrate, vapour check layer,&nbsp;30mm insulation, 3 layers of BUR, this has subsequently been upgraded with a two layer felt overlay&nbsp;system, a significant amount of water was found on the concrete substrate on the lower roof<br />
area.&nbsp;This lower section has to be stripped, then renewed with a new felt system with a 110mm thick insulation&nbsp;to comply with the current Building Regulations, sufficient and suitable breather vents&nbsp;should be installed to enable the trapped moisture to escape.&nbsp;The core sample taken on the higher section did not reveal any trapped moisture, however, we&nbsp;cannot discount the possibility that some moisture could be trapped in other areas, furthermore if a&nbsp;roof has already been overlaid it is not good practice to install additional layers, we would therefore&nbsp;recommend that this area is also stripped and renewed with the same specification as the lower&nbsp;roof.</p>

<p><br />
The existing perimeter kerb detail is in poor order, (plywood base water damaged), once this been&nbsp;removed a purpose made galvanised steel flashing should be installed over the void to provide a&nbsp;firm base for the new waterproofing, rather than raise the height of kerb we would recommend infilling&nbsp;the void with a mineral wool type insulation to avoid any cold spots, a new colour coated purpose&nbsp;made flashing can then be installed to complete the edge of the new roof and marry up with&nbsp;the existing signage.&nbsp;We understand that a new door is to be installed for access onto the roof. (Separate cost for this to be sent).&nbsp;</p>

<p><u><strong>Scope of Works</strong></u></p>

<p>To supply, erect and subsequently dismantle a two board wide working platform along the front elevation, including for obtaining and payment of all fees&nbsp;for a Pavement License from the Local Authority. This will provide edge protection&nbsp;for ourselves and to prevent any materials or equipment falling, it will be bridged across doorways and erected and struck to keep inconvenience&nbsp;to your clients normal operations to a minimum.</p>

<p><br />
To strip off in stages the existing roofing system back to the original concrete substrate remove all&nbsp;surface water and using a propane gas torch dry the concrete as far as practical, then apply the&nbsp;following new Index Building Products Limited, torch-applied, high performance felt system which&nbsp;is covered by a 20 Year Insurance Back Guarantee.</p>

<p><br />
Debris will be bagged up and removed from site early by vehicle, prior to the store opening (skip&nbsp;not practical), several visits would be required to prevent a build up of debris on the roof. Materials&nbsp;and equipment would be delivered early mornings and raised to roof before the store opens.&nbsp;Primer: Indever Bituminous primer and allow to cure, Vapour Barrier: Vapour Diffuser felt&nbsp;Vapour Diffuser is the&nbsp; membrane designed by Index to resolve the problem&nbsp;of vapour diffusion while guaranteeing an optimal adhesion in time, also on&nbsp;uneven surfaces. The underside has a series of large bitumen bubbles covering approx. 35% of the surface with the exception of the overlapping side strip. The bubbles protrude from the membrane 3.5&divide;4 mm and once they&nbsp;have been heated with the torch, become thick adhesive bitumen rivets that&nbsp;adapt to the uneven substrate, forming a strong bond.&nbsp;Insulation: 110mm thick PIR Boards laid in Index Adhesive.<br />
Base Layer: 3mm Helastopol P felt, Cap Sheet: Proteaduo Mineral Surface felt&nbsp;Breather Vents: Install at the a rate of one per 8 m2 of roofing Aluminium Vents (25 No in all)&nbsp;Details: Form all perimeter upstands, kerbs, change in level upstand and all other&nbsp;associated roofing details to complete the new roof to the Guarantee&nbsp;Standard.</p>

<p><br />
Front Parapet: Once removed, infill the void with mineral wool insulation.&nbsp;Supply and fix a new 0.9mm thick galvanised steel flashing over the void. Supply and fix the base layer and cap sheet over the new flashing.&nbsp;Supply and fix a purpose made, colour coated flashing, manufactured from&nbsp;0.7mm thick galvanised steel with a PVF colour coated to suit the&nbsp;existing signage.</p>

<p>Budget Cost for Door/window = &pound;4,000.00</p>
