Insulation retrofit under low-slope roofs
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Insulation retrofit under low-slope roofs by Myer J. Rosenfield

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Published by Construction Engineering Research Laboratory, U.S. Army, Corps of Engineers, National Technical Information Service, distributor in Champaign, Ill, [Springfield, VA .
Written in English


  • Roofs -- Thermal properties.,
  • Insulation (Heat)

Book details:

Edition Notes

Statementby Myer J. Rosenfeld, Donald E. Brotherson.
SeriesTechnical report -- M-308., Technical report (Construction Engineering Research Laboratory) -- M-308.
ContributionsBrotherson, Donald E., Construction Engineering Research Laboratory.
The Physical Object
Pagination26 p. :
Number of Pages26
ID Numbers
Open LibraryOL17550084M

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Technical description. Section detail. Roof insulation. Insulation to existing room, replace ceiling thin. Suggested installation sequence: Preparation of roof and loft space: Remove any existing loose material and prepare in accordance with manufacturer's requirements. Any alterations to cabling, existing ventilation, and other fixtures, affected by the work to be agreed with contract. Phenolic foam eaves insulation: To BS EN or Agrément certified. For all works to existing roofs refer to Approved document C (resistance to contaminants and moisture), with reference to Section 2, and section 6. Approved Document F (ventilation) should be referred to with regards to ventilation to existing roofs and over eaves ventilation.   For larger roofs, you may need to provide direct framing-to-framing contact. But even though an unconditioned roof won’t benefit from being covered in foam, it will need to be detailed so that it aesthetically matches the rest of the roof retrofit work. It needs to be furred out with something so the trim details will later : Michael Maines. Retrofit room in roof insulation is now established as a common energy efficiency measure in the domestic sector. This guide is intended to supplement Annex B12 of PAS to offer more specific advice. This document identifies the main viable methods that can be deployed and seeks to offer guidance on appropriate installation techniques.

Single-ply roof manufacturers may also have minimum requirements for roof deck properties, depending on how the roof insulation and roof membrane are attached. Roof insulation or single-ply membranes that are adhered, rather than mechanically-attached, are more sensitive to excessive deflection.   Flat Roof Insulation Installation The rigid foam board insulation we used was 2″ thick and came in 4′ x 8′ sheets. Once the roof demo was complete and the flat roof was cleared of any remaining debris, some rotted 2x material around the perimeter of the roof was replaced. There is a requirement when refurbishing a roof to have a minimum U-value of W/m²K in England and Wales, but for a complete re-roof in Wales the minimum U-Value required is W/m²K. When specifying the insulation for the pitched roof it is important that the thickness of insulation used achieves the required U-value.   Eric Dymond lives in a s Baltimore row house that needs a new roof. He plans on replacing the low-slope, built-up roof with an EPDM membrane, and the question is how to insulate it correctly. Currently, the built-up asphalt roof is installed over Homasote (or something similar) and a roof deck made of wood planks.

  Unvented roof systems, where the insulation and air barrier are applied directly to the underside of the roof deck, are common in applications where designers are seeking cost-effective and energy-efficient roof assemblies. However, designers of compact roof assemblies must consider vapor permeance and arrangement of the roofing materials to produce acceptable hygrothermal .   For anyone living below the Mason Dixon line it is never worth the expense to retrofit an old house with wall insulation. One situation where it is okay to insulate the walls is if you remove all the siding and apply a new housewrap and then go over that . 3. Install no more insulation than can be covered during the same working day. 4. Taper roof insulation to drain sumps using tapered edge strips. If insulation layer is 1 ½” or less, taper 12” from the drain bowl. If insulation thickness exceeds 1 ½”, taper 18” from the drain bowl. InsulFoam Single-Ply (SP) Fire-Rated Single-Ply Roof Insulation with Factory Laminated Glass Facer. Ideal for low-slope roofing. InsulFoam SP is an engineered insulation consisting of a superior closed-cell, lightweight and resilient expanded polystyrene (EPS) with a durable and stable, factory-laminated coated glass facer.